S-7760A00XX-HCT1 datasheet(32/53 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)

S-7760A

Rev.1.3_00

Seiko Instruments Inc.

32

4. 2 Initialization time

The S-7760A initializes at the same time when the power supply voltage is raised. Input instructions to the S-7760A

after initialization. The S-7760A does not accept any instruction during initialization.

Figure 35

shows the initialization time of the S-7760A.

Rise time (tRISE)

[s]

S-7760A initialization

time (tINIT) Max.

[s]

100 m

10 m

1.0 m

100

µ

10

µ

1.0

µ

1.0

µ 10 µ 100 µ 1.0 m 10 m 100 m

Figure 35 Initialization Time of S-7760A

5. Data hold time (tHD. DAT

= 0 ns)

If SCL and SDA of the S-7760A are changed at the same time, the timing which takes to reach this IC slightly lags

due to a load on the bus line. As a result, the change in the SDA precedes a falling edge of SCL so that S-7760A

may recognize a start/stop condition.

To avoid this, in the S-7760A, it is recommended to set the delay time of over 0.3

µs for a falling edge of SCL.

In its specs, it is described as the S-7760A works at 0 ns of data hold time, however, take account into the above

action in actual use.

SCL

SDA

tHD. DAT = 0.3

µs Min.

Figure 36 Data Hold Time

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S-7760A00XX-HCT1 Datasheet(PDF) 32 Page - Seiko Instruments Inc

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