s-24c02ci-t8t1u Seiko Instruments Inc., s-24c02ci-t8t1u Datasheet - Page 20

• Manufacturer Part Number: s-24c02ci-t8t1u
• Description: 2-wire Cmos Serial E2prom
• Manufacturer: Seiko Instruments Inc.

20
2-WIRE CMOS SERIAL E
S-24C01C/02C
Write Inhibition Function at Low Power Voltage
8. Address Increment Timing
The S-24C01C/02C has a built-in detection circuit which operates with the low power supply voltage, cancels Write when
the power supply voltage drops and power-on. Its detection and release voltages are 1.20 V typ. (Refer to Figure 23 ).
The S-24C01C/02C cancels Write by detecting a low power supply voltage when it receives a stop condition.
In the data trasmission and the Write operation, data in the address written during the low power supply voltage is not
assurable.
The timing for the automatic address increment is the falling edge of the SCL clock for the 8th bit of the read data in
read operation and the falling edge of the SCL clock for the 8th bit of the received data in write operation.
Power Supply Voltage
SCL
SDA
SCL
SDA
Detection Voltage ( − V
1.20 V Typ.
R / W = 0
R / W = 1
8
8
2
Figure 21 Address Increment Timing in Reading
Figure 22 Address Increment Timing in Writing
PROM
Figure 23 Operation at Low Power Voltage
ACK Output
ACK Output
DET
9
9
)
Seiko Instruments Inc.
Write Instruction cancel
D7 Output
D7 Input
1
1
Address Increment
Release Voltage ( + V
1.20 V Typ.
Address Increment
D0 Output
D0 Input
8
8
ACK Output
9
9
DET
)
Rev.2.0
_00_C