DS4520 Datasheet, PDF (5/10 Pages) Maxim Integrated Products – 9-Bit I2C Nonvolatile I/O Expander Plus Memory

9-Bit I²C Nonvolatile
I/O Expander Plus Memory
Pin Description
PIN
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.
6
A0 I²C Address Input. Inputs A0, A1, and A2 determine the I²C slave address of the device.
7
A1 I²C Address Input. Inputs A0, A1, and A2 determine the I²C slave address of the device.
8
V_CC Power-Supply Voltage
9
SDA I²C Serial Data Open-Drain Input/Output
10
SCL I²C Serial Clock Input
11
A2 I²C Address Input. Inputs A0, A1, and A2 determine the I²C 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
Block Diagram
SDA
SCL
A0
A1
A2
V_CC
V_CC
I²C
INTERFACE
GND
EEPROM
64 BYTES
USER MEMORY
[00h TO 3Fh]
DS4520
I/O CONTROL
REGISTERS
PULLUP ENABLE (F0h-F1h)
I/O CONTROL (F2h-F3h)
I/O STATUS (F8h-F9h)
I/O CELL (x9)
V_CC
R_PU
I/O_n
[n = 0 TO 8]
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