SLx 24C64

Semiconductor Group

5

Preliminary 1998-07-27

Pin Definitions and Functions

Pin Description

Serial Clock (SCL)

The SCL input is used to clock data into the device on the rising edge and to clock data

out of the device on the falling edge.

Serial Data (SDA)

SDA is a bidirectional pin used to transfer addresses, data or control information into the

device or to transfer data out of the device. The output is open drain, performing a wired

AND function with any number of other open drain or open collector devices. The SDA

bus requires a pull-up resistor to

V

Chip Select (CS0, CS1, CS2)

The CS0, CS1 and CS2 pins are chip select inputs either hard wired or actively driven

to

V

acommonbus.

Write Protection (WP)

WP switched to

V

WP switched to

V

Table 1

Pin No.

Symbol

Function

1, 2, 3

CS0, CS1, CS2

Chip select inputs

4

V

SS

Ground

5

SDA

Serial bidirectional data bus

6

SCL

Serial clock input

7

WP

Write protection input

8

V

CC

Supply voltage