S-7760A00XX-HCT1 datasheet(31/53 Pages) SII

Part #	S-7760A00XX-HCT1

Description	PROGRAMMABLE PORT CONTROLLER (PORT EXPANDER WITH BUILT-IN E2PROM CIRCUIT)

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Manufacturer	SII [Seiko Instruments Inc]

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PROGRAMMABLE PORT CONTROLLER (PORT EXPANDER WITH BUILT-IN E2PROM CIRCUIT)

Rev.1.3_00

S-7760A

Seiko Instruments Inc.

31

Rise time (tRISE) Max.

[ms]

Power supply voltage(VCCH)

[V]

50

5.0

4.0

3.0

2.0

100

150

200

For example:

If your S-7760A’s supply voltage = 3.0 V, raise the power supply voltage to 3.0 V within 100 ms.

Figure 34 Raising Time of Power Supply Voltage

When initialization is successfully completed by the power-on-clear circuit, the S-7760A enters the standby status.

If the power-on-clear circuit does not operate, the followings are the possible causes.

(1)

Because the S-7760A has not completed initialization, an instruction previously input is still valid or an

instruction may be inappropriately recognized. In this case, S-7760A may perform the Write operation.

(2)

The voltage drops due to power off while the S-7760A is being accessed. Even if the master device is reset

due to the low power voltage, the S-7760A may malfunction unless the conditions for the power-on-clear

operation are satisfied.

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