s-24c04bphal Seiko Instruments Inc., s-24c04bphal Datasheet - Page 19

• Manufacturer Part Number: s-24c04bphal
• Description: 2-wire Cmos Serial E2prom
• Manufacturer: Seiko Instruments Inc.

1. Adding a pull-up resistor to SDA I/O pin and SCL input pin
2. Slave address
Rev.3.0
Using S-24C04BPHAL
Add a 1 k Ω to 5 k Ω pull-up resistor to the SCL input pin
functions of the I
*1. When the SCL input pin of the E
The S-24C04BPHAL does not have slave address pins (A0, A1, A2). Therefore two or more of this IC cannot
be used on the same bus.
However, slave addresses can be used without changing the communication software because they are
arbitrary addresses in communication with the master device.
connect the same pull-up resistor to prevent a high impedance status from being input to the SCL input
pin.
This protects the E
state pin when the microprocessor is reset when the voltage drops.
_00
SDA line
2
C-bus protocol. Normal communication cannot be provided without a pull-up resistor.
2
MSB
PROM from malfunction due to an undefined output (high impedance) from the tri-
1
0
2
PROM is connected to a tri-state output pin of the microprocessor,
Seiko Instruments Inc.
1
Figure 18
0
x
Don’t care
*1
and the SDA I/O pin in order to enable the
2-WIRE CMOS SERIAL E
x
P0
R/W
S-24C04BPHAL
ACK
LSB
2
PROM
19