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S-7760A Datasheet(PDF) 6 Page - Seiko Instruments Inc

Part No. S-7760A
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
Logo SII - Seiko Instruments Inc

S-7760A Datasheet(HTML) 6 Page - 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.
6
WP
Figure 8 WP Pin
DO
VCCL
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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