CXA2108 查看數據表（PDF） - Sony Semiconductor

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CXA2108

Constant-Current Driver for Full Color LED Display

Sony Semiconductor 

Pin Description

Pin

No.

9, 56

Symbol

AGND

Reference

I/O voltage

level

— GND

8, 57 AVCC — 5V (Typ.)

12, 22, 42 DGND — GND

23, 43 DVCC — 5V (Typ.)

5, 60,

66, 70, IGND

75, 79

— GND

10,

53, 54

NC

—

21 CLK

I CMOS

51 XRST I CMOS

11 MODE I CMOS

34 to 41,

44

A0 to 8

I CMOS

45 A9

I CMOS

24 to 33 D0 to 9 I/O CMOS

CXA2108Q

Equivalent circuit

Description

Analog GND.

Analog power supply.

Digital GND.

Digital power supply.

GND for driver output.

DVCC

21 51 11

34 35 36

37 38 39

40 41 44 45

DGND

DVCC

Open.

This pin is not connected with the

internal circuits.

Clock input.

Driver operation is synchronized with

this clock.

Reset input.

The IC is initialized by inputting low

level. However, the memory is not

initialized. Input high level during

normal operation.

Output mode switching.

Upper/Lower mode for low level input.

Upper/Lower/RGB mode for high level

input. (See the Description of Operation.)

Address input.

These pins are used to input the internal

RAM (luminance data, brightness data

and drive current data RAM) address.

RAM selection.

The luminance data RAM is selected

when this pin is low, and the drive

current data RAM when high.

DGND

DVCC

24 25 26

27 28 29

30 31 32 33

Data I/O.

These pins are used to input and

output data to and from the internal

RAM (luminance data, brightness data

and drive current data RAM). See

Table 1. Read/Write Switching

Condition Correspondence Table for

the data I/O switching conditions.

DGND

–4–

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