S-7760A53XX-HCT1 datasheet(17/53 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.

17

Condition to Start Timer

Table 13 Condition to Start Timer

Option

Condition

Reload

TIMEN Pin

Bit TEN3 to 0

A

Start

→ Finish

“H”

Don’t care

B

Regular status

“L”

→ “H”

Don’t care

1

C

Regular status

“H”

Write “0”

→ “1”

2

D

Regular status

Don’t care

Write “0”

→ “1”

2 types of options are available for the condition to start a timer. Select either for each digital output port DO0 to 3;

if selecting option 1, the condition to start a timer is three, A/B/C.

If in option 2, the condition is D only. In D, the S-7760A does not react to reload and rising of TIMEN. By writing “1” in TEN,

not in TIMEN, the timer starts.

During power-on of power supply VCCH, the S-7760A automatically reloads (transmits data from the E

2PROM to the

register). In this case, TIMEN = “H” and it is in option 1, the S-7760A goes in the timer action after reloading. Thus the

sequential action is; after power-on of power supply VCCH, reload

→ timer. This is as well if the status changed from

detection to release of the low power supply voltage.

The timer action does not stop in the middle of its process even if setting TIMEN in “H”

→ “L” after the timer action has

started. In selecting “the option for internal oscillation circuit”, the oscillation circuit is generally being stopped, but the

oscillation starts when the condition to start a timer matches. And it stops by finishing the timer action (the final invert of

output).

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S-7760A53XX-HCT1 Datasheet(PDF) 17 Page - Seiko Instruments Inc

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