CM6327A_技术文档

CM6327A

USB Single-Chip Audio Solution for Mono Microphone

DESCRIPTION

FEATURES

The CM6327A is C-Media’s new Audio SOC IC

designed for advanced VoIP applications. It boasts

a high-performance mono ADC, as well as I2C

interface, that allows for communication with

various microprocessors and DSPs. The CM6327A

offers low-noise, high-quality speech input,

important when it comes to recording or



USB specification 2.0 full speed-compliant and

USB IF-certified

USB audio device specification 1.0- and USB HID

specification 1.1-compliant

Supports control/interrupt/isochroous data

transfers

USB suspend/resume and remote wake-up

support

broadcasting conference calls or public speeches.

Embedded USB transceiver and power-on reset

circuit

Also, the CM6327A integrates all essential analog

modules, including 1-ch ADC, PLL, regulator and

USB transceiver modules, along with an EEPROM

that allows you to customize the product string,

PID and VID. Sampling rates of 8/11.025/16/22.05/

32/44.1 and 48 KHz, high-quality 16-bit resolutions

and user-friendly general purpose inputs and

outputs for customized functions are supported. In

addition, many features can be programmed using

an external EEPROM and MCU, which are easily

controlled via the HID software interface.



Single 12MHz crystal input with on-chip PLL

Supports series number string for operation

system detection



Serial EEPROM programming interface supports

customized VID/PID/product and manufacture

strings

EEPROM interface supports 24C02 data format

BLOCK DIAGRAM

CM6327A

GPIO/LED

PC

USB

Interface controller &

signal processing

16-bit

48KHz

PGA

USB host

interface

Regulator

ROM

Register

I2C

Internal PLL

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Rev. 2.0 ︱ Page 1

CM6327A

USB Single-Chip Audio Solution for Mono Microphone

TABLE OF CONTENTS

1

2

3

Description and Overview ................................................................................................ 4

Features ..................................................................................................................... 4

Pin Descriptions ............................................................................................................ 6

3.1

3.2

3.3

Pin Assignment by Pin Number................................................................................. 6

Pin-Out Diagram.................................................................................................. 6

Pin Signal Descriptions .......................................................................................... 7

4

5

6

Block Diagram .............................................................................................................. 9

Ordering Information.....................................................................................................10

USB Audio Topology and Descriptions..................................................................................11

6.1

6.2

6.3

6.4

USB Audio Topology .............................................................................................11

Device Descriptors ..............................................................................................11

Configuration Descriptors......................................................................................12

Standard HID Interface Descriptors..........................................................................13

7

Function Block Descriptions:............................................................................................14

7.1 I2C Interface: ....................................................................................................14

7.1.1

Master Mode: ..........................................................................................14

Slave Mode: ............................................................................................15

EEPROM Data Format.................................................................................19

7.1.2

7.1.3

8

Electrical Characteristics:...............................................................................................21

8.1 Absolute Maximum Rating ...............................................................................................21

8.2 Operation Conditions.....................................................................................................21

8.3 Electrical Parameters ....................................................................................................22

9

Analog Performance ......................................................................................................23

9.1

9.2

ADC Frequency Response ......................................................................................23

ADC THD + N .....................................................................................................23

Reference .........................................................................................................................24

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Rev. 2.0 ︱ Page 2

CM6327A

USB Single-Chip Audio Solution for Mono Microphone

Release Notes

Revision

Date

Description

Updated the EEPROM data format

Address 0x09: Reserved

1.8

2010/4/26

2012/9/27

2012/10/1

Address 0x12 (Bit2): Reserved (0: Default)

Address 0x13: Reserved

1.9

Revised format

Updated the EEPROM Data Format

Address 0x02(Bit3):Reserved

Address 0x03(Bit7):Reserved

Address 0x0a:Reserved

2.0

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Rev. 2.0 ︱ Page 3

CM6327A

USB Single-Chip Audio Solution for Mono Microphone

1 Description and Overview

This is a highly integrated single-chip USB audio solution that is built for a wide range of USB audio

controller and applications. Based on our experiences designing and manufacturing PC USB Audio

peripherals, as well as recommendations from vendors, C-Media has designed this single-chip solution to

make it easier for vendors to integrate their products, and increase their revenues.

The CM6327A is C-Media’s new Audio SOC IC designed for advanced VoIP applications. It boasts a

high-performance mono ADC, as well as I2C interface, that allows for communication with various

microprocessors and DSPs. The CM6327A offers low-noise, high-quality speech input, important when it

comes to recording or broadcasting conference calls or public speeches.

The CM6327A integrates all essential analog modules, including 1-ch ADC, PLL, regulator and USB

transceiver modules, along with an EEPROM that allows you to customize the product string, PID and VID.

Sampling rates of 8/11.025/16/22.05/ 32/44.1 and 48 KHz, high-quality 16-bit resolutions and user-friendly

general purpose inputs and outputs for customized functions are supported. Many features can be

programmed using an external EEPROM and MCU, which are easily controlled via the HID software interface.

2 Features



USB spec. 2.0 full speed-compatible and USB IF-certified

USB audio device class 1.0- and USB HID specification 1.1-compliant

Supports control/interrupt/isochroous data transfers

USB suspend/resume and remote wake-up support

Embedded USB transceiver and power-on reset circuit

Single 12MHz crystal input with on-chip PLL

Supports series number string for operation system detection

Serial EEPROM programming interface supports customized VID/PID/product and manufacture strings

for device name changes and configurations



EEPROM interface support 24C02 data format

Mono ADC input:

ADC sampling rate of 8K/11.025K/16K/22.05K/32K/44.1K/48KHz, and 16-bit resolution

Dynamic range: 96db, THD+N: -89~96db

Digital linear microphone gain control function (-16db~45db)

1.0Vrms input swing biased at 2.25V



Supports Microsoft HID functions

Supports I2C (master/slave) control interface for external controller used

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Rev. 2.0 ︱ Page 4

CM6327A

USB Single-Chip Audio Solution for Mono Microphone



I2C MCU read/write support 16 bytes data transfer bandwidth

I2C interface support extra interrupt pin INT

MCU/EEPROM/GPIO control via HID/vender command interface

USB audio topology has 1 input terminal, 1 output terminal, 1 selector unit and 1 feature unit

Supports 2 LED indicator pins:

1.

2.

On/Off/Operation

Recording mute



Supports 8 GPIO and 2 GPI pins

Isochronous transfer uses adaptive mode with Internal PLL for synchronization

Embedded power-on-reset block

Single 5V power supply with embedded 5V to 3.3V regulator

Industry standard LQFP-48 pin package

Compatible with Win2000/WinXP/Vista/Win7/MAC/OSX/Linux/Wii/XBOX360/PS2/PS3

Supports hardware SDK tool for third-party software development

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Rev. 2.0 ︱ Page 5

CM6327A

USB Single-Chip Audio Solution for Mono Microphone

3 Pin Descriptions

3.1 Pin Assignment by Pin Number

1

Signal Name

PDSW

13

14

15

16

17

18

19

20

21

22

23

24

Signal Name

N.C.

25

26

27

28

29

30

31

32

33

34

35

36

Signal Name

AVSS

37

38

39

40

41

42

43

44

45

46

47

48

Signal Name

AVDD

2

N.C.

HID_EN

N.C.

MIC_IN

N.C.

REGV_4V5

N.C.

3

TEST

4

GPIO_1

GPIO_2

GPIO_3

GPIO_4

LED_1

N.C.

VREF

GPI_1

5

I2C_SCLK

I2C_SDAT

I2C_INT

USB_DP

USB_DM

DVSS

VBIAS

N.C.

GPI_2

6

GPIO_5

GPIO_6

GPIO_7

GPIO_8

MUTE_REC

RM_Wake

DVSS

7

AVDD

AVSS

8

9

LED_3

10

11

12

XTAL_I

XTAL_O

N.C.

AVSS

REGV_3V3

DVDD5V

N.C.

AVDD

3.2 Pin-Out Diagram

PDSW

1

36

35

34

33

32

31

30

29

28

27

26

25

AVDD

N.C.

TEST

2

3

AVSS

AVDD

N.C.

GPIO_1

GPIO_2

GPIO_3

GPIO_4

LED_1

LED_3

XTAL_I

XTAL_O

N.C.

4

5

CM6327A

6

7

8

VBIAS

VREF

N.C.

LQFP-48

9

10

11

12

MIC_IN

AVSS

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Rev. 2.0 ︱ Page 6

CM6327A

USB Single-Chip Audio Solution for Mono Microphone

3.3 Pin Signal Descriptions

No.

1

Symbol

PDSW

N.C.

Type

OD, 5V

N.C.

Description

Power-down switch output

(0: Normal operation; 1: Suspend)

N.C.

2

Test mode select

3

TEST

DI, PD

(0: Normal Mode; 1: Test Mode)

General purpose I/O pin

LED (Play or Record)

LED (Mute Record)

4

5

GPIO_1

GPIO_2

GPIO_3

GPIO_4

LED_1

LED_3

XTAL_I

XTAL_O

N.C.

DIO

DO

6

7

8

9

DO

10

11

12

13

DI

Input pin for 12MHz oscillator

Output pin for 12MHz oscillator

N.C.

DO

N.C.

HID bottom function enable

(0: Disable; 1: Enable)

N.C.

14

HID_EN

DI, PU

15

16

17

18

19

20

21

22

23

24

N.C.

OD, DIO

DO

N.C.

I2C_SCLK

I2C_SDAT

I2C_INT

USB_DP

USB_DM

DVSS

I2C serial clock/EEPROM 24c02 serial clock

I2C serial data/EEPROM 24c02 serial data

I2C interrupt output

USB D+

AIO

USB D-

P

Digital ground

REGV_3V3

DVDD5V

AO

5V->3.3V regulator output

5V power supply to internal regulator

P

25

AVSS

P

Analog ground

26

27

28

MIC_IN

N.C.

AI

N.C.

AO

MIC input

N.C.

VREF

2.25V reference voltage output

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Rev. 2.0 ︱ Page 7

CM6327A

USB Single-Chip Audio Solution for Mono Microphone

29

30

31

32

33

34

35

36

37

38

39

40

41

42

43

44

45

46

47

48

VBIAS

N.C.

AO

N.C.

P

MIC bias voltage

N.C.

AVDD

5V analog power for analog circuit

Analog ground

AVDD

P

AVSS

P

AVSS

P

Analog ground

N.C.

P

N.C.

AVDD

5V Analog power for analog circuit

4.5V regulator output

N.C.

AVDD

P

REGV_4V5

N.C.

AO

N.C.

DI, PU

DIO

DI, PU

P

GPI_1

General purpose input pin (VU)

General purpose input pin (VD)

General purpose I/O pin

HID MIC Record Mute

GPI_2

GPIO_5

GPIO_6

GPIO_7

GPIO_8

MUTE_REC

RM_Wake

DVSS

Remote wakeup pin to make PC resume from suspend

Digital ground

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Rev. 2.0 ︱ Page 8

CM6327A

USB Single-Chip Audio Solution for Mono Microphone

4 Block Diagram

CM6327A

GPIO/LED

PC

USB

Interface controller &

signal processing

16-bit

48KHz

ADC

PGA

USB host

interface

Regulator

ROM

Register

I2C

Internal

PLL

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Rev. 2.0 ︱ Page 9

CM6327A

USB Single-Chip Audio Solution for Mono Microphone

5 Ordering Information

Operating Ambient

Temperature

Model Number

CM6327A

Package

Supply Range

48-Pin LQFP, 7mm × 7mm × 1.45mm (Plastic)

0°C to +70°C

DVdd = 5V, AVdd = 5V

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Rev. 2.0 ︱ Page 10

CM6327A

USB Single-Chip Audio Solution for Mono Microphone

6 USB Audio Topology and Descriptions

6.1 USB Audio Topology

FEA

SEL

IT

OT

MIC

USB STREAM

6.2

Device Descriptors

Offset

Field

bLength

Size

Value (Hex)

Description

0

1

2

1

2

1

12

01

Descriptor length

Device descriptor

USB 1.1-compliant

bDescriptorType

bcdUSB

2

0110

00

4

bDeviceClass

bDeviceSubClass

bDeviceProtocol

bMaxPacketSize0

idVendor

Device class specified by interface

Device subclass specified by interface

Device protocol specified by interface

Endpoint zero packet size

Vendor ID

5

00

6

00

7

10

8

0d8c

0134

0100

03

10

12

14

15

16

17

idProduct

Product ID

bcdDevice

Device release number

iManufacturer

iProduct

Manufacturer string descriptor index

Product string descriptor index

01

iSerialNumber

bNumConfigurations

00 or 03(*) Serial number string descriptor index

01 Number of configurations

Note 1: When valid EEPROM is detected, Vendor ID and Product ID will be replaced by the content of the EEPROM

Note 2: iSerialNumber will be valid only if the external EEPROM contains this info

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Rev. 2.0 ︱ Page 11

CM6327A

USB Single-Chip Audio Solution for Mono Microphone

6.3 Configuration Descriptors

Offset

Field

Size

Value (Hex)

Description

0

1

2

bLength

1

2

09

02

Descriptor length

bDescriptorType

wTotalLength

Configuration descriptor

007f～00dd

Total length of data returned for this configuration

Number of interfaces supported in configuration:

00: Control

4

bNumInterfaces

1

03

02: ISO-IN

03: INT-IN (HID)

5

6

bConfigurationValue

iConfiguration

1

01

00

Configuration value

Index of string descriptor describing this

configuration

Bus-powered with remote wakeup support: 8’ha0

(PWRSEL_1 = 1, HID_EN = 1)

a0 or

80 or

e0 or

c0

Bus-powered with no remote wakeup: 8’h80

(PWRSEL_1 = 1, HID_EN = 0)

7

8

bmAttributes

1

Self-powered with remote wakeup support: 8’he0

(PWRSEL_1 = 0, HID_EN = 1))

Self-powered with no remote wakeup: 8’hc0

(PWRSEL_1 = 0, HID_EN = 0))

Maximum power consumption from bus = 100mA:

8’h32 (50x2 mA) (PWRSEL_2 = 1)

bMaxPower

32

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Rev. 2.0 ︱ Page 12

CM6327A

USB Single-Chip Audio Solution for Mono Microphone

6.4 Standard HID Interface Descriptors

Offset

Field

Size

1

Value (Hex)

Description

0

1

2

3

4

5

6

7

8

bLength

09

04

02

00

01

03

00

Descriptor length

bDescriptorType

bInterfaceNumber

bAlternateSetting

bNumEndpoints

bInterfaceClass

bInterfaceSubClass

bInterfaceProtocol

iInterface

1

Interface descriptor

1

Interface number: 02

Alternate interface

1

Number of endpoints used by this interface

HID interface class

1

Subclass code

1

Protocol code

1

Interface string descriptor index

Class-specific HID Interface Descriptors

Offset

Field

Size

Value (Hex)

Description

Descriptor length

0

1

2

4

5

6

7

bLength

1

2

1

2

09

21

bDescriptorType

bcdHID

HID descriptor type

HID class version

0100

00

bCountryCode

bNumDescriptors

bDescriptorType

wDescriptorLength

No country code

01

One HID class descriptor

Report Descriptor

22

0032 / 001a HID class descriptor length in byte: 50 / 26 bytes

(Enable / Disable HID Button)

Standard HID Interrupt In Endpoint Descriptors

Offset

Field

Size

Value (Hex)

Description

0

1

2

3

4

6

bLength

1

2

1

07

05

Descriptor length

bDescriptorType

bEndpointAddress

bmAttributes

wMaxPacketSize

bInterval

Endpoint descriptor

87

IN endpoint, endpoint number: 7

Interrupt endpoint

03

0010

01

Maximum packet size: 16 bytes

1ms

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Rev. 2.0 ︱ Page 13

CM6327A

USB Single-Chip Audio Solution for Mono Microphone

7 Function Block Descriptions

7.1 I2C Interface

7.1.1 Master Mode

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Rev. 2.0 ︱ Page 14

CM6327A

USB Single-Chip Audio Solution for Mono Microphone

7.1.2 Slave Mode

“7-bit slave address = 7’b0111000”

On the MCU serial interface, the CM6327 serves as a slave device with bit rate up to 400Kbps (fast mode).

The MCU can write data to the CM6327A or read data from the CM6327A (no size limitations when using the

I2C Interface). Since the host side and MCU both have access to all the internal registers, access contention

when both host and MCU try to access the same register should be avoided upon application. The CM6327A’s

7-bit slave address is assigned as 7’b0111000.

When data is written by the MCU, the CM6327A will NOT transfer any interrupts to the PC until the INT bit of

the I2C control register has been set by the MCU. The USB host will keep polling the upward HID report every

1ms. When any button is pressed or released, or there is incoming MCU data, the CM6327A will transfer 16

bytes of HID report to the USB host.

In I2C Slave Mode, the CM6327A has one open-drain input pin (SCLK) from where it receives the serial clock

from the MCU, and one open-drain I/O pin (SDAT) from where it sends or receives serial signals to/from the

MCU. As shown below, SDAT should be stable when SCLK is high, and can transition only when SCLK is low.

START and STOP conditions shown below are the exception. Every transaction begins from a START, and

ends with a STOP, or another START (repeated START).

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Rev. 2.0 ︱ Page 15

CM6327A

USB Single-Chip Audio Solution for Mono Microphone

The figure below demonstrates a typical transaction. After every 8 bits sent by the transmitter, the receiver

should send one bit low for positive acknowledgement or one bit high for negative acknowledgement. After

the negative acknowledgement, a STOP or repeated START should follow. The next figure shows more

details about the acknowledgement bit. Note that SCLK is always driven by the master.

P

SDAT

Sr

MSB

Acknowledgement

Acknowledgment

Signal from Receiver

SCLK

Sr

or

P

S

or

Sr

2

1

8

9

3 - 8

9

1

7

ACK

START or Repeated

START Condition

STOP or Repeated

START Condition

Data Transfer on the MCU Interface

The figure below shows a complete data transfer. After a START, the MCU should send a 7-bit slave address

(7’b0111000) first, with the 8th bit denoting a read transfer when it’s high, or a write transfer when it’s low.

The first acknowledgement always comes from the CM6327A.

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Rev. 2.0 ︱ Page 16

CM6327A

USB Single-Chip Audio Solution for Mono Microphone

During the write transfer, the MCU continues acting as the master, and the transfer direction is not changed.

The following figure gives an example of one byte write transfer.

MCU write:

S

0x70

0

addr

0

Byte 0

0

Byte 1

0

….

0

Byte N

0

P

From CM6327A to MCU

START condition

From MCU to CM6327A

STOP condition

S

0

P

1

Positive acknowledge

Negative acknowledge

Byte N

One byte data

The CM6327A’s slave address is 0x70, which will also tell the CM6327A when it’s receiving a write command.

CM6327A regards the first coming data byte as the register address. The second data byte is the data

content that the MCU writes at the register address. The CM6327A will auto-increment the register address

to the next register address for the following data writes.

The figure below shows an example of a read transfer. The MCU read command cannot set the register

address, so the MCU must use a write command to set the register address first, and then start the read

command. Because the CM6327A auto-increments the register address, the second data byte will be the

register data on the next address.

MCU read:

S

0x70

0x71

0

addr

0

Byte 0

Byte 1

0

…..

0

Byte N

1

P

From CM6327A to MCU

START condition

From MCU to CM6327A

STOP condition

S

0

P

1

Positive acknowledge

Negative acknowledge

Byte n One byte of data

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Rev. 2.0 ︱ Page 17

CM6327A

USB Single-Chip Audio Solution for Mono Microphone

The figure below gives a complete picture of a typical transaction between the MCU and CM6327A. After a

START, the MCU should send a 7-bit slave address (7’b0111000) first, with the 8th bit denoting a read

transfer when it’s high, or a write transfer when it’s low.

MCU write:

S

0x70

0

addr

0

Byte 0

0

Byte 1

0

…..

0

Byte N

0

P

MCU read:

S

0x70

0

addr

0

0x71

Byte 0

Byte 1

0

…..

0

Byte N

1

P

From CM6327A to MCU

START condition

From MCU to CM6327A

STOP condition

S

0

P

1

Positive acknowledge

Negative acknowledge

Byte N One byte of data

During a write transfer, the MCU acts as the transmitter. The CM6327A will regard the first byte of data

received as the start register address. The following DATA bytes are the contents of the registers that the

MCU has requested. In a read transfer, two transactions are necessary. The MCU resets the start register

address by the first transaction, then direction changes for the MCU to receive data in the second

transaction.

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Rev. 2.0 ︱ Page 18

CM6327A

USB Single-Chip Audio Solution for Mono Microphone

7.1.3

EEPROM Data Format

Address

Description

0x00

0x01

Magic word (“C”, 8’h43)

Magic word (“M”, 8’h4D)

EEPROM Content Setting (EEPROM_OPTION_1)

bit0: Manufacture String Valid? (0: No, 1: Yes)

bit1: Product String Valid? (0: No, 1: Yes)

bit2: Serial Number Valid? (0: No, 1: Yes)

bit3: Reserved

0x02

bit4: Recording (ADC) initial control Valid? (0: No, 1: Yes)

bit5: ADC gain range Control Valid? (0: No, 1: Yes)

bit6: Disable Selector unit? (0: No, 1: Yes)

bit7: Enable Remote Wakeup? (0: Disable, 1: Enable)

Recording (ADC) initial-L (EEPROM_OPTION_2)

bit[5:0]: ADC(unit Fa) initial Volume L-byte

(6’h2E ~ 6’h00, 30~ -16dB, -1dB/step)

bit6: Mute_fa (ADC) initial Value (0: Un-Mute, 1: Mute)

bit7: Reserved

0x03

Recording (ADC) initial-H (EEPROM_OPTION_3)

(1)bit[3:0]: ADC (Unit Fa) initial volume H-byte

(4’hf ~ 4’h0, 15 ~ 0dB, -1dB/step)

0x04

Bit[4]: control ADC HP filter by EEPROM (0 : No, 1 : Yes)

Bit[5]: ADC HP filter enable (0 : Disable, 1 : Enable)

Bit[7:6]: Reserved

Recording (ADC) max range Control_L (EEPROM_OPTION_4)

bit[7:0]: ADC (Unit fa) max. Volume[7:0]

0x05

0x06

0x07

Recording (ADC) max. range Control_H (EEPROM_OPTION_5)

bit[7:0]: ADC (Unit fa) max. Volume[15:8]

Recording (ADC) min range Control_L (EEPROM_OPTION_6)

bit[7:0]: ADC (Unit fa) min. Volume[7:0]

Recording (ADC) min. range Control_H (EEPROM_OPTION_7)

bit[7:0]: ADC (Unit fa) min. Volume[15:8]

Reserved

0x08

0x09

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Rev. 2.0 ︱ Page 19

CM6327A

USB Single-Chip Audio Solution for Mono Microphone

0x0a

0x0b

Reserved

Manufacture string 1 length: this number doesn’t include the first 2 bytes of the

string descriptor, and its unit is one Unicode word (EEPROM_OPTION_A)

Product string 2 length: this number doesn’t include the first 2 bytes of the

string descriptor, and its unit is one Unicode word (EEPROM_OPTION_B)

Serial number string 3 length: this number doesn’t include the first 2 bytes of

the string descriptor and its unit is one Unicode word (EEPROM_OPTION_C)

VID (low byte) (EEPROM_OPTION_D)

0x0c

0x0d

0x0e

0x0f

0x10

0x11

VID (high byte) (EEPROM_OPTION_E)

PID (low byte) (EEPROM_OPTION_F)

PID (high byte) (EEPROM_OPTION_10)

misce reg (EEPROM_OPTION_11)

Bit0: Boot gain (volume boot gain 18dB; using digmic boost gain =18dB)

Bit1: Enable PLL adjustment (0: No, 1: Yes)

Bit2: Reserved (0 : default )

0x12

0x13

Reserved

0x14 ~ 0x4f

Reserved (60 bytes)

Manufacture string (X bytes): only fill one byte of Unicode in this content, HW

will add the other byte 0x00

0x50 ~0x(50+X-1)

0x(50+X)~

0x(50+X+Y-1)

0x(50+X+Y)~

0x(50+X+Y+Z-1)

Others

Product string (Y bytes): only fill one byte of Unicode in this content, HW will

add the other byte 0x00

Serial number string (Z bytes): only fill one byte of Unicode in this content, HW

will add the other byte 0x00

Reserved

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Rev. 2.0 ︱ Page 20

CM6327A

USB Single-Chip Audio Solution for Mono Microphone

8 Electrical Characteristics

8.1 Absolute Maximum Rating

Symbol

Dvmin

Parameter

Min. digital supply voltage

Value

– 0.3

Unit

V

Dvmax

Avmin

Max. digital supply voltage

Min. analog supply voltage

Max. analog supply voltage

Voltage on any digital input or output pin

Voltage on any analog input or output pin

Storage temperature range

Junction operating temperature (commercial)

ESD human body mode

+ 6

V

– 0.3

V

Avmax

Dvinout

Avinout

T_stg

+ 6

V

–0.3 to +5.5

-40 to +125

0~+115

4000

V

⁰C

V

Tj

ESD (HBM)

ESD (MM)

Latch Up

ESD machine mode

400

V

Class-3

200

mA

8.2 Operation Conditions

Operation conditions

Min

Typ

Max

Unit

Analog supply voltage

4.35

5.0

33

5.5

-

V

Digital supply voltage

4.35

Operation power consumption

Standby power consumption

Suspend mode power consumption

Operating ambient temperature

-

mA

uA

⁰C

28

-

410

-

0

70

*Notes: Test environment under 25^oC, 5.0V, 48K sample rate;

Max. output is playing 1K full-scale sine wave, typical output is playing music

www.cmedia.com.tw

Rev. 2.0 ︱ Page 21

CM6327A

USB Single-Chip Audio Solution for Mono Microphone

8.3 Electrical Parameters

Min

Typ

-

Max

-96

-

Unit

dB

THD + N (20 ~ 20KHz)

Dynamic range

-89

-

96

-

dB

Frequency response 48KHz

Frequency response 44.1KHz

Input voltage (rms)

20

-

20K

-

Hz

-

Hz

1.2

Vrms

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Rev. 2.0 ︱ Page 22

CM6327A

USB Single-Chip Audio Solution for Mono Microphone

9 Analog Performance

9.1 ADC Frequency Response

9.2 ADC THD + N

www.cmedia.com.tw

Rev. 2.0 ︱ Page 23

CM6327A

USB Single-Chip Audio Solution for Mono Microphone

REFERENCE



USB specification 2.0-compliant

USB audio device class specification 1.0-compliant

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Rev. 2.0 ︱ Page 24

CM6327A

USB Single-Chip Audio Solution for Mono Microphone

－End of Datasheet－

C-MEDIA ELECTRONICS INC.

6F., 100, Sec. 4, Civil Boulevard, Taipei, Taiwan 106 R.O.C.

TEL：+886-2-8773-1100

FAX：+886-2-8773-2211

E-MAIL：sales@cmedia.com.tw

Disclaimer:

Information furnished by C-Media Electronics Inc. is believed to be accurate and reliable. However, no responsibility is assumed by C-Media Electronics Inc. for its use, nor for any

infringements of patents or other rights of third parties that may result from its use. Specifications subject to change without notice. No license is granted by implication or

otherwise under any patent or patent rights of C-Media. Trademark and registered trademark are the property of their respective owners.

www.cmedia.com.tw

Rev. 2.0 ︱ Page 25


型号：	CM6327A
厂家：	C-MEDIA ELECTRONICS
描述：	USB Single-Chip Audio Solution for Mono Microphone
文件：	总25页 (文件大小：582K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

CM6327A [CMEDIA]

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