s-24cs16a Seiko Instruments Inc., s-24cs16a Datasheet - Page 19
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s-24cs16a
Manufacturer Part Number
s-24cs16a
Description
2-wire Cmos Serial E2prom
Manufacturer
Seiko Instruments Inc.
Datasheet
1.S-24CS16A.pdf
(46 pages)
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Rev.5.1
8. Address Increment Timing
Write Inhibition Function at Low Power Voltage
The S-24CS16A has a detection circuit for low power voltage. The detection circuit cancels a write instruction when the
power voltage is low or the power switch is on. The detection voltage is 1.85 V typically and the release voltage is 1.95
V typically, the hysteresis of approximate 0.1 V thus exists. (See Figure 22 .)
When a low power voltage is detected, a write instruction is canceled at the reception of a stop condition.
When the power voltage lowers during a data transmission or a write operation, the data at the address of the operation
is not assured.
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.
_00
SDA
SCL
SCL
SDA
Power supply
Detection voltage (−V
1.85 V Typ.
R / W = 0
voltage
R / W = 1
8
8
Figure 20 Address Increment Timing in Reading
Figure 21 Address Increment Timing in Writing
Figure 22 Operation at Low Power Voltage
ACK Output
ACK Output
DET
9
9
)
Seiko Instruments Inc.
Write Instruction cancel
0.1 V approximately
D7 Output
D7 Input
Hysteresis width
1
1
2-WIRE CMOS SERIAL E
Address Increment
Address Increment
D0 Output
D0 Input
Release voltage (+V
1.95 V Typ.
8
8
ACK Output
9
9
DET
)
S-24CS16A
2
PROM
19