SM3518 [SHARP]

4-Bit Single-Chip Microcomputer(For Data Bank Use); 4位单片机（用于数据银行使用）


型号：	SM3518
厂家：	SHARP ELECTRIONIC COMPONENTS
描述：	4-Bit Single-Chip Microcomputer(For Data Bank Use) 4位单片机（用于数据银行使用）
文件：	总3页 (文件大小：37K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

SM3518

4-Bit Single-Chip Microcomputer

(For Data Bank Use)

SM3518

DESCRIPTION

The SM3518 is a CMOS 4-bit single-chip micro-

computer for databank incorporating data memory

RAM, LCD driver (the output is adjustable in 16

steps for various contrast), key/switch input circuit,

8-bit parallel I/O port, 2 output ports and buzzer

output circuit. The chip also has memory expansion

controlling feature. One of two ports contains spe-

cial output circuit for infrared (IR) communication.

By connecting an external crystal, a 1Hz timer is

made possible for easier clock function.

FEATURES

• ROM capacity :

Program ROM 12 k x 23 bits

Character ROM 6 x 8 x 256 bits

Constant ROM 1 k x 4 bits

• RAM capacity :

Working RAM

Display RAM

Data RAM

256 x 4 bits

74 x 16 bits

3 k x 8 bits

• Memory expansion (external) : 1M x 8 bits x 3

• LCD display : 74 - segment x 16 - common

• I/O ports :

Parallel I/O

Input

8 bits

2 bits

Output

2 bits

Buzzer output

Key input

1 bit (4 kHz)

6 bits

• Standby release : 2 events (2 Hz signal, key input)

• Built-in oscillator :

System clock (built-in CR oscillator)

(external ceramic resonator)

Timer (built-in CR oscillator)

(external crystal)

1 MHz

32.8 kHz

32.768 kHz

• Instruction cycle time : 3 µs

• Operating temperature : –10 to +60°C

• Supply voltage : 2.5 to 5.5 V

• Package : 128-pin QFP (QFP128-P-2828)

[Test Sample only]

In the absence of confirmation by device specification sheets, SHARP takes no responsibility for any defects that may occur in equipment using any SHARP devices shown in catalogs, data books,

etc. Contact SHARP in order to obtain the latest device specification sheets before using any SHARP device.

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SM3518

SYSTEM COMFIGURATION EXAMPLE

(HIGH END DATA BANK)

Common signal

Segment signal

S1-S74

CE1-CE3

H¹-H16