S-7760A53XX-HCT1 datasheet(19/53 Pages) SII

Part #	S-7760A53XX-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.

19

This IC goes in the status to reset the circuits when the power supply voltage decreases less than the level of the

detection voltage of the circuit for prevention malfunction by low voltage (1.75 V Typ.). And the DO7 to 0 pins go in “L”.

After that, when the power supply voltage increases more than the level of the release voltage of the circuit for prevention

malfunction by low voltage (2.05 V Typ.), data is reloaded from the E

2PROM to the register, the values of DO7 to 0 pins go

back to its default.

Signal of low power

supply voltage

detection

2.05 V Typ.

Oscillation circuit

EN

DO3 pin

(When E

2PROM

CTR3 = 0)

Data loading

Time out

CTR3 register

(When E

2PROM

CTR3 = 0)

*1. Output from DO7 to 0 goes in “L” when the power supply voltage decreases more than the level of the detection

voltage of the circuit for prevention malfunction by low voltage.

*2. A period to define data is; the loading period from E

2PROM + the period to stabilize output from DO7 to 0 pin = within

100

µs.

DO2 pin

(When E

2PROM

CTR2 = 1)

CTR2 register

(When E

2PROM

CTR2 = 1)

Delay time by timer setting with DO2

Start condition

Device code

Reload instruction

ACK

Stop condition

SDA

SCL

1.75 V Typ.

*1

Reload starts

Period to define data

*2

TIMEN pin

Timer action starts by reloading

Exceeded the release voltage of

low supply voltage detection

(2.05 V); Timer action starts

Time out

Delay time by timer setting with DO3

Power supply voltage

VCCH / VCCL

Delay time by timer setting with DO3

Reload starts

Delay time by timer setting with DO2

Reload starts

Period to define data

*2

Figure 20 Data Loading and Timer Action Example 2

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S-7760A53XX-HCT1 Datasheet(PDF) 19 Page - Seiko Instruments Inc

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