s-24c32c Seiko Instruments Inc., s-24c32c Datasheet - Page 9

• Manufacturer Part Number: s-24c32c
• Description: 2-wire Serial Eeprom S-24c32c/64c 32k/64k-bit
• Manufacturer: Seiko Instruments Inc.

Rev.2.0
Pin Functions
1. A0, A1 and A2 (Slave Address Input) Pins
2. SDA (Serial Data Input / Output) Pin
3. SCL (Serial Clock Input) Pin
4. WP (Write Protect Input) Pin
In the S-24C32C/64C, to set the slave address, connect each pin of A0, A1, A2 to GND or V
can set 8 types of slave address by a combination of A0, A1, A2 pins.
Comparing the slave address transmitted from the master device and one that you set, makes possible to select the
S-24C32C/64C from other devices connected onto the bus.
Be sure to connect to fix the address input pin to GND or V
Each A0, A1 and A2 pin has a pull-down resistor. In high impedance, these pins have the status when they are
connected to GND.
The SDA pin is used for the bi-directional transmission of serial data. This pin is a signal input pin, and an Nch open
drain output pin.
In use, generally, connect the SDA line to any other device which has the open-drain or open-collector output with
Wired-OR connection by pulling up to V
The SCL pin is used for the serial clock input. Since the signals are processed at a rising or falling edge of the SCL
clock, pay attention to the rising and falling time and comply with the specification.
The write protect is enabled by connecting the WP pin to V
GND or set in high impedance.
_00_H
Maximum value of
pull-up resistor
[k ]
CC
20
18
16
12
10
by a resistor ( Figure 9 shows the relation with an output load).
14
Figure 9 Output Load
8
6
4
2
0
Seiko Instruments Inc.
10
Value of load capacity
CC
CC
.
. When not using the write protect, connect this pin to
[pF]
f
SCL
2-WIRE CMOS SERIAL E
= 400 kHz
100
CC
. Therefore the users
S-24C32C/64C
2
PROM
9