S-7760A31XX-HCT1 datasheet(6/53 Pages) SII

Part #	S-7760A31XX-HCT1

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

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Manufacturer	SII [Seiko Instruments Inc]

Direct Link	http://www.sii.co.jp

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

S-7760A

Rev.1.3_00

Seiko Instruments Inc.

6

WP

Figure 8 WP Pin

DO

VCCL

Figure 9 DO Pin

Option Regarding High/Low Leveled Input Voltage for Pin

For the SDA, SCL and TIMEN pins, the two types of high/low leveled input voltage are selectable by option.

1. CMOS input type

The high/low leveled input voltage varies according to the power supply voltage.

The value is defined by the rate for power supply voltage as; VIH

≥ 0.7 × VCCH by high leveled input voltage, VIL ≤ 0.3 ×

VCCH by low leveled input voltage.

2. Low voltage input type

This option is effective when the power supply voltage at MPU is lower than the one of the S-7760A.

If using this option, setting a level-shifter for an interface signal is unnecessary.

Independent of the power supply voltage, the high/low leveled input voltage is constant, moreover, the value is also

constant unlike the definition by the rate as; VIH

≥ 1.5 V by high leveled input voltage, VIL ≤ 0.3 V by low leveled input

voltage.

The TIMEN pin is able to set as the RESX pin by option, however, also in this case the types regarding high/low leveled

input voltage are selectable.

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