s-24cs64a Seiko Instruments Inc., s-24cs64a Datasheet - Page 23

• Manufacturer Part Number: s-24cs64a
• Description: 2-wire Cmos Serial E2prom
• Manufacturer: Seiko Instruments Inc.

Rev.4.1
When initialization is successfully completed via the power-on-clear circuit, the E
standby status.
If the power-on-clear circuit does not operate, the following are the possible causes.
(1) Because the E
(2) The voltage may have dropped due to power off while the E
If the power-on-clear circuit does not operate, match the phase (reset) so that the internal E
is normally reset. The statuses of the E
when phase is matched (reset) are the same.
_00
may be inappropriately recognized. In this case, writing may be performed.
microprocessor is reset due to the low power voltage, the E
power-on-clear operation conditions of E
conditions of E
Power supply voltage
2
2
PROM, refer to 5.1 Raising power supply voltage .
PROM has not been initialized, an instruction formerly input is valid or an instruction
For example:
If your E
voltage to 5.0 V within 200 ms.
(V
[V]
Figure 27 Raising Time of Power Supply Voltage
CC
)
2
PROM supply voltage = 5.0 V, raise the power supply
2
Seiko Instruments Inc.
PROM immediately after the power-on-clear circuit operates and
5.0
4.0
3.0
2.0
2
PROM are satisfied. For the power-on-clear operation
Rise time (t
50
[ms]
100 150
2-WIRE CMOS SERIAL E
RISE
2
PROM is being accessed. Even if the
2
) Max.
PROM may malfunction unless the
200
2
PROM enters the
S-24CS64A
2
PROM circuit
2
PROM
23