s-25a080a Seiko Instruments Inc., s-25a080a Datasheet - Page 11

• Manufacturer Part Number: s-25a080a
• Description: 25?c Operation Spi Serial E2prom For Automotive Electric Component
• Manufacturer: Seiko Instruments Inc.

Rev.1.0
125°C OPERATION SPI SERIAL E
Pin Function
1. CS (Chip select input) Pin
2. SI (Serial data input) pin
3. SO (Serial data output) pin
4. SCK (Serial clock input) pin
5. WP (Write protect input) pin
6. HOLD (HOLD input) pin
This is an input pin to set a chip in the select status. In the “H” input level, the device is in the non-select status and its
output is high impedance. The device is in standby as long as it is not in Write inside. The device goes in active by
setting the chip select to “L”. Input any instruction code after power-on and a falling of chip select.
This pin is to input serial data. This pin receives an instruction code, an address and Write data. This pin latches data
at rising edge of serial clock.
This pin is to output serial data. The data output changes at falling edge of serial clock.
This is a clock input pin to set the timing of serial data. An instruction code, an address and Write data are received at
a rising edge of clock. Data is output at falling edge of clock.
Write protect is purposed to protect the area size against the Write instruction (BP1, BP0 in the status register). Fix
this pin “H” or “L” not to set it in the floating state.
Refer to “ Protect Operation” for details.
This pin is used to pause serial communications without setting the device in the non-select status.
In the hold status, the serial output goes in high impedance, the serial input and the serial clock go in “Don’t care”.
During the hold operation, be sure to set the device in active by setting the chip select ( CS pin) to “L”.
Refer to “ Hold Operation” for details.
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PROM FOR AUTOMOTIVE ELECTRIC COMPONENT
Seiko Instruments Inc.
S-25A080A/160A/320A
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