S-25C020A Просмотр технического описания (PDF) - Unspecified

Номер в каталоге

Компоненты Описание

производитель

S-25C020A

105°C OPERATION SPI SERIAL E2PROM FOR AUTOMOTIVE

Unspecified 

Rev.3.0_01_C

105°C OPERATION SPI SERIAL E2PROM FOR AUTOMOTIVE

S-25C010A/020A/040A H Series

7. Write memory data (WRITE)

Figures 18 and 19 show the timing charts when inputting 1-byte data. Input the instruction code, the address and data

from serial data input (SI) after inputting “L” to the chip select ( CS ). To start WRITE (tPR), set the chip select ( CS ) to

“H” after inputting data or before inputting a rising of the next serial clock. Bit WIP and WEL are reset to “0” when Write

has completed.

The S-25C010A/020A/040A can Page Write of 16 bytes. Its function to transmit data is as same as Byte Write

basically, but it operates Page Write by receiving sequential 8-bit Write data as much data as page size has. Input the

instruction code, the address and data from serial data input (SI) after inputting “L” in CS , as the WRITE operation

(page) shown in Figures 20 and 21. Input the next data while keeping CS in “L”. After that, repeat inputting data of 8-

bit sequentially. At the end, by setting CS to “H”, the WRITE operation starts (tPR).

4 of the lower bits in the address are automatically incremented every time when receiving Write data of 8-bit. Thus,

even if Write data exceeds 16 bytes, the higher bits in the address do not change. And lower 4 bits in the address roll

over so that Write data which is previously input is overwritten.

These are cases when the WRITE instruction is not accepted or operated.

 Bit WEL is not set to “1” (not set to “1” beforehand immediately before the WRITE instruction)

 During Write

 The address to be written is in the protect area by BP1 and BP0.

 The WP signal is in “L”.

To cancel the WRITE instruction, input the clock different from a specified value (n = 16 + m  8 clocks) while CS is in

“L”.

19

Share Link: