Rainbow-electronics DS4520 Manual do Utilizador descarregar pdf (Página 5)

DS4520

9-Bit I

C Nonvolatile

I/O Expander Plus Memory

_____________________________________________________________________ 5

Pin Description

NAME

FUNCTION

1 I/O_0 Input/Output 0. Bidirectional I/O pin.

2 I/O_1 Input/Output 1. Bidirectional I/O pin.

3 I/O_2 Input/Output 2. Bidirectional I/O pin.

4 I/O_3 Input/Output 3. Bidirectional I/O pin.

5 I/O_4 Input/Output 4. Bidirectional I/O pin.

6A0I

C Address Input. Inputs A0, A1, and A2 determine the I

C slave address of the device.

7A1I

C Address Input. Inputs A0, A1, and A2 determine the I

C slave address of the device.

Power-Supply Voltage

9 SDA I

C Serial Data Open-Drain Input/Output

10 SCL I

C Serial Clock Input

11 A2 I

C Address Input. Inputs A0, A1, and A2 determine the I

C slave address of the device.

12 I/O_5 Input/Output 5. Bidirectional I/O pin.

13 I/O_6 Input/Output 6. Bidirectional I/O pin.

14 I/O_7 Input/Output 7. Bidirectional I/O pin.

15 I/O_8 Input/Output 8. Bidirectional I/O pin.

16 GND Ground

DS4520

I/O CONTROL

REGISTERS

I/O CELL (x9)

I/O_n

[n = 0 TO 8]

PULLUP ENABLE (F0h-F1h)

I/O CONTROL (F2h-F3h)

I/O STATUS (F8h-F9h)

INTERFACE

SDA

SCL

GND

EEPROM

64 BYTES

USER MEMORY

[00h TO 3Fh]

Block Diagram

1 2 3 4 5 6 7 8 9 10

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