S-93C46C Datasheet, PDF (10/39 Pages) Seiko Instruments Inc – 3-WIRE SERIAL E2PROM

3-WIRE SERIAL E²PROM
S-93C46C/56C/66C/76C/86C
Rev.1.1_00
 Pin Functions
1. CS (chip select input) pin
This is an input pin to set a chip in the select status. In the "L" input level, this IC is in the non-select status and its
output is "High-Z". This IC is in standby as long as it is not in write inside. This IC goes in active by setting the chip
select to "H". Input any instruction code after power-on and a rising of chip select.
2. SK (serial clock input) pin
This is a clock input pin to set the timing of serial data. A start bit, an operation code, an address and a write data are
received at a rising edge of clock. Data is output during rising edge of clock.
3. DI (serial data input) pin
This pin is to input serial data. This pin receives a start bit, an operation code, an address and a write data. This pin
latches data at rising edge of serial clock.
4. SO (serial data output) pin
This pin is to output serial data. The data output changes at rising edge of serial clock.
5. TEST (test input) pin
This is an input pin in test mode. Connect to GND or the VCC pin, or set to open. Because this pin has a built-in
pull-down element, pull-down current flows when it connected to VCC pin.
 Initial Delivery State
Initial delivery state of all addresses is "FFFFh".
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