CDB8130_技术文档

CDB8130

Evaluation Board for CS8130

Features

Description

The CDB8130 evaluation board allows fast and easy

evaluation of the CS8130 infrared transceiver. The

board contains an RS-232 level shifter and DB-9 serial

connector to allow easy interfacing to a standard PC se-

rial (COM) port.

z Designed to conform to IrDA Physical Layer

Specification

z Interfaces to PC Serial Port

z Operates from +2.7 V to 5.5 V Power Supply

z Includes Evaluation Software

Additionally, the board is shipped with a complete set of

diagnostic and test software, as well as the Infrared Data

Association Link Access Protocol (IrLAP) reference

code.

ORDERING INFORMATION

CDB8130

VD+

VA+

AGND

DGND

RESET

Circuit

LEDs

and

RS-232

Level

Translator

9-Pin

Serial

Connector

CS8130

Diode

MAR ‘06

DS170DB5

http://www.cirrus.com

CDB8130

TABLE OF CONTENTS

1 CS8130 INFRARED TRANSCEIVER ........................................................................................ 3

1.1 Power Supply Circuitry and Grounding .............................................................................. 3

1.2 Reset Circuit ...................................................................................................................... 3

1.3 Optical Interface ................................................................................................................. 3

1.4 RS-232 Interface ................................................................................................................ 5

1.5 Header Interface ................................................................................................................ 5

1.6 Clock Selection .................................................................................................................. 6

1.7 Power Down ....................................................................................................................... 6

1.8 Status Indicator LEDs ........................................................................................................ 6

1.9 Software ............................................................................................................................. 6

2 REVISION HISTORY .............................................................................................................. 10

LIST OF FIGURES

Figure 1. CS8130 and RS-232 Level Translator ............................................................................. 4

Figure 2. Power Supply Circuitry..................................................................................................... 5

Figure 3. Reset Circuit..................................................................................................................... 5

Figure 5. Unused Gates and Resistors ........................................................................................... 7

Figure 4. Power Supply Circuitry..................................................................................................... 7

Figure 6. Component-side Silkscreen (Not to Scale) ...................................................................... 8

Figure 7. Component-side Trace Layer (Not to Scale).................................................................... 9

Figure 8. Solder-side Trace Layer (Not to Scale).......................................................................... 10

Contacting Cirrus Logic Support

For all product questions and inquiries contact a Cirrus Logic Sales Representative.

To find the one nearest to you go to www.cirrus.com

IMPORTANT NOTICE

Cirrus Logic, Inc. and its subsidiaries (“Cirrus”) believe that the information contained in this document is accurate and reliable. However, the information is subject

to change without notice and is provided “AS IS” without warranty of any kind (express or implied). Customers are advised to obtain the latest version of relevant

information to verify, before placing orders, that information being relied on is current and complete. All products are sold subject to the terms and conditions of sale

supplied at the time of order acknowledgment, including those pertaining to warranty, indemnification, and limitation of liability. No responsibility is assumed by Cirrus

for the use of this information, including use of this information as the basis for manufacture or sale of any items, or for infringement of patents or other rights of third

parties. This document is the property of Cirrus and by furnishing this information, Cirrus grants no license, express or implied under any patents, mask work rights,

copyrights, trademarks, trade secrets or other intellectual property rights. Cirrus owns the copyrights associated with the information contained herein and gives con-

sent for copies to be made of the information only for use within your organization with respect to Cirrus integrated circuits or other products of Cirrus. This consent

does not extend to other copying such as copying for general distribution, advertising or promotional purposes, or for creating any work for resale.

CERTAIN APPLICATIONS USING SEMICONDUCTOR PRODUCTS MAY INVOLVE POTENTIAL RISKS OF DEATH, PERSONAL INJURY, OR SEVERE PROP-

ERTY OR ENVIRONMENTAL DAMAGE (“CRITICAL APPLICATIONS”). CIRRUS PRODUCTS ARE NOT DESIGNED, AUTHORIZED OR WARRANTED FOR USE

IN AIRCRAFT SYSTEMS, MILITARY APPLICATIONS, PRODUCTS SURGICALLY IMPLANTED INTO THE BODY, AUTOMOTIVE SAFETY OR SECURITY DE-

VICES, LIFE SUPPORT PRODUCTS OR OTHER CRITICAL APPLICATIONS. INCLUSION OF CIRRUS PRODUCTS IN SUCH APPLICATIONS IS UNDERSTOOD

TO BE FULLY AT THE CUSTOMER'S RISK AND CIRRUS DISCLAIMS AND MAKES NO WARRANTY, EXPRESS, STATUTORY OR IMPLIED, INCLUDING THE

IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR PARTICULAR PURPOSE, WITH REGARD TO ANY CIRRUS PRODUCT THAT IS USED

IN SUCH A MANNER. IF THE CUSTOMER OR CUSTOMER'S CUSTOMER USES OR PERMITS THE USE OF CIRRUS PRODUCTS IN CRITICAL APPLICA-

TIONS, CUSTOMER AGREES, BY SUCH USE, TO FULLY INDEMNIFY CIRRUS, ITS OFFICERS, DIRECTORS, EMPLOYEES, DISTRIBUTORS AND OTHER

AGENTS FROM ANY AND ALL LIABILITY, INCLUDING ATTORNEYS' FEES AND COSTS, THAT MAY RESULT FROM OR ARISE IN CONNECTION WITH

THESE USES.

Cirrus Logic, Cirrus, and the Cirrus Logic logo designs are trademarks of Cirrus Logic, Inc. All other brand and product names in this document may be trademarks

or service marks of their respective owners.

IBM is a registered trademark of International Business Machines Corporation.

Temic is a registered trademark of Temic Telefunken Microelectronics, GmbH.

Hewlett-Packard is a registered trademark of Hewlett-Packard Corporation.

2

DS170DB5

CDB8130

tween +2.7V and +5.5V (defined by the power sup-

ply requirements of the CS8130.)

1 CS8130 INFRARED TRANSCEIVER

The CDB8130 provides an example application of

the CS8130 infrared transceiver. This application The evaluation board is split into two ground

is similar to an IR pod system that is designed to planes, an analog plane and a digital plane. The

plug into any standard RS-232 port, like the COM

port on the back of an IBM -compatible PC, to plane, and the RS-232 level translator, reset circuit,

CS8130 and IR components reside on the analog

®

provide an easy-to-use infrared interface.

and status indicator circuitry lie over the digital

ground plane. The ground planes are connected in

exactly one place at jumper J31, located near the

power supply connections.

Additionally, the board allows for easy interfacing

directly to the CS8130 through stake header J11 al-

lowing other applications to be easily realized.

Figure 1 shows the CS8130 and RS-232 level

translator connections.

1.2

Reset Circuit

Figure 3 shows the power-up and user-activated re-

set circuit. As shipped from the factory, this circuit

is not used. The RESET signal is instead supplied

by the RS-232 interface signal RTS. This configu-

ration allows the CS8130 to be reset under software

control.

A description of the CS8130 including register def-

initions, control pin assignments, and other useful

information can be found in the CS8130 data sheet.

1.1

Power Supply Circuitry and

Grounding

To derive the reset function from the power-

up/manual reset circuit instead, remove stake

jumper J9 (RTS) and install stake jumper J12 (RE-

SETSW). These jumpers are shown in Figure 1.

Figure 2 shows the power supply configuration of

the evaluation board. Power is supplied to the

board by two terminal blocks and a DC power jack,

J21, J22, and J23 (DCPWR). To operate the board

from a single power supply, stake jumper J20 must

be installed. In this configuration, power should be

supplied to the board through the VD+/DGND ter-

minal block (J21) or the DCPWR jack (J23).

1.3

Optical Interface

®

The CDB8130 is shipped with Temic and

®

Hewlett-Packard IR components installed. The

receiver PIN diode is Temic model BPV 22 NF.

Transmit LED D5 is a Hewlett-Packard HSDL-

4220, and D6 is a Temic TSHA5502.

A 3.3V regulator, U5, is supplied on the board. To

use this regulator, stake jumper J2 (USE REG)

should be installed. To bypass the regulator, J1

(NO REG) should be installed.

These components are not soldered in place. In-

stead, they are held by gold-plated pins. These pins

allow for any insertion and removal of other IR

components for performance and compatibility

evaluation.

To isolate the power supply driving the CS8130

from the supply powering the rest of the circuitry,

remove J20, and feed the CS8130’s power supply

into the VA+/AGND terminal block (J22). The rest

of the circuit should be powered through either the

VD+/DGND terminal block (J21) or the DCPWR

jack (J23).

The default configuration for the transmitter circuit

has one LED per output driver. One or both LEDs

can be active at the same time by programming the

appropriate register in the CS8130, allowing soft-

ware to control the transmitter output power.

Using the on-board voltage regulator, the evalua-

tion board may be powered from any DC voltage

between +4V and +6.5V. If the voltage regulator is

bypassed, the acceptable operating voltage is be-

Additionally, the transmit drivers on the CS8130

can be connected in parallel to share current. This

DS170DB5

3

CDB8130

4

DS170DB5

CDB8130

Figure 2. Power Supply Circuitry

1.4

RS-232 Interface

The CDB8130 is designed to connect to any stan-

dard RS-232 port through the female DB-9 connec-

tor marked “RS-232.” The MAX562 (U2) supplies

the voltage level translation function, taking the ±

12V RS-232 levels and translating them to standard

CMOS logic levels.

Table 1 shows the default mapping of UART sig-

nals to CS8130 pins.

CS8130 Pin

RXD

UART Signal

RXD

Direction

to UART

Figure 3. Reset Circuit

allows systems using only one LED to operate with

a much higher drive current than can be sourced by

using a single driver. To connect the transmitter

drivers in this way, install jumper J17.

TXD

to CS8130

to UART

FORM/BSY

D/C

CTS

DTR

to CS8130

RESET

RTS

The LED transmitter driver resistors (R3 and R4)

are optimized for a power supply voltage of 3.3V.

For operation at voltages greater than this, the val-

ues of these resistors must be increased.

Table 1. CS8130-to-UART Connections

1.5

Header Interface

If desired, the RS-232 level translator can be re-

moved from the circuit. The signals are discon-

nected by removing jumpers J5, J6, J7, J8, and J9.

DS170DB5

5

CDB8130

Removing J35 will disconnect power from the lev-

el translator.

it means when a LED is lit can be confusing. Table

2 should help clarify this.

All the digital signals on the CS8130, FORM/BSY,

D/C, TXD, RXD, EXTCLK, RESET, PWRDN,

and CLKFR can be accessed directly from header

J11. All digital input pins are tied to 47 kΩ pull-up

resistors through resistor set R1.

Name

LED1C

LED2C

PWRDN

RESET

RXD

LED On means. . .

Transmitter #1 active

Transmitter #2 active

Power down asserted

Reset asserted

Data being received by the CS8130

Data being transmitted to the CS8130

CS8130 in Control Mode

Auto detect ASK/TV TX ready

1.6

Clock Selection

TXD

The clock for the CS8130 can be supplied via a

crystal tied between XTALIN and XTALOUT (the

default configuration on the evaluation board) or

by an external clock supplied through the EXT-

CLK pin.

D/C

FORM/BSY

Table 2. LED Indicator Meanings

1.9

Software

To operate the CS8130 from an external clock

source, cut the trace under J3 (XTAL), and the

(XTAL) part of J4, then connect the center pin of J4

to the edge pin marked EXT.

The CDB8130 evaluation kit comes equipped with

software that can be used to evaluate and test the

CS8130. Additional software is currently under

development.

Note: the EXTCLK pin on the CS8130 can be ei-

ther an input or an output. If the CS8130 is being

clocked from a crystal, EXTCLK is an output. If

no crystal is present, EXTCLK is an input. This de-

termination of direction is made while RESET is

asserted.

See the documentation supplied with the CDB8130

evaluation kit for instructions on how to use the

software.

Software updates and new releases can be down-

loaded from the Crystal BBS. Contact the factory

for details.

The CS8130 can be operated from either a 3.6864

MHz or a 1.8432 MHz clock source. If operating

from a 3.6864 MHz source, jumper J18 (CLKFR)

must be installed. This brings the CLKFR pin on

the CS8130 low. If operating from a 1.8432 MHz

source, jumper J18 should be removed.

1.7

Power Down

Jumper J14 (PWRDN) controls the state of the

PWRDN pin on the CS8130. PWRDN is asserted

when J14 is installed.

1.8

Status Indicator LEDs

Key digital signals on the CS8130 are displayed on

indicator LEDs U6 (U8) and U7 (U9), shown sche-

matically in Figure 4. Because these LEDs are

driven through inverters, the interpretation of what

6

DS170DB5

CDB8130

Figure 4. Power Supply Circuitry

Figure 5. Unused Gates and Resistors

DS170DB5

7

CDB8130

Figure 6. Component-side Silkscreen (Not to Scale)

8

DS170DB5

CDB8130

Figure 7. Component-side Trace Layer (Not to Scale)

DS170DB5

9

CDB8130

Figure 8. Solder-side Trace Layer (Not to Scale)

2 REVISION HISTORY

Revision

DB4

Date

Changes

Initial public release

APR 2002

MAR 2006

DB5

Updated company contact information & legal statement.

10

DS170DB5


型号：	CDB8130
厂家：	CIRRUS LOGIC
描述：	Evaluation Board 评估板
文件：	总10页 (文件大小：687K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

CDB8130 [CIRRUS]

相关型号：

CDB82

CDB8415A

CDB8416

CDB8420

CDB8421

CDB8422

CDB8427

CDB87D10

CDB87D10NP-R23MC

CDB87D78

CDB87D78NP-R15MC

CDB8952