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Data Sheet

Main Memory Page Read Read Main Memory Page to Buffer Buffer to Main Memory Page Buffer 1 Write Buffer 2 Write
Transfer Compare Erase & Write Write
Buf1 Buf2 Buf1 Buf2 Buf1 Buf2 Buf1 Buf2 Buf1 Buf2
52H 54H 56H 53H 55H 60H 61H 83H 86H 88H 89H 84H 87H
0 0 0 0 0 0 1 1
1 1 1 1 1 1 0 0
0 0 0 0 1 1 0 0
1 1 1 1 0 0 0 0
0 0 0 0 0 0 0 0
0 1 1 0 1 0 0 1 1
1 0 1 1 0 0 0 0 1
0 0 0 1 1 0 1 0 1
r X X r r r X X
r X X r r r X X
r X X r r r X X
PA11 X X PA11 PA11 PA11 X X
PA10 X X PA10 PA10 PA10 X X
PA9 X X PA9 PA9 PA9 X X
PA8 X X PA8 PA8 PA8 X X
PA7 X X PA7 PA7 PA7 X X
PA6 X X PA6 PA6 PA6 X X
PA5 X X PA5 PA5 PA5 X X
PA4 X X PA4 PA4 PA4 X X
PA3 X X PA3 PA3 PA3 X X
PA2 X X PA2 PA2 PA2 X X
PA1 X X PA1 PA1 PA1 X X
PA0 X X PA0 PA0 PA0 X X
BA8 BFA8 BFA8 X X X BFA8 BFA8
BA7 BFA7 BFA7 X X X BFA7 BFA7
BA6 BFA6 BFA6 X X X BFA6 BFA6
BA5 BFA5 BFA5 X X X BFA5 BFA5
BA4 BFA4 BFA4 X X X BFA4 BFA4
BA3 BFA3 BFA3 X X X BFA3 BFA3
BA2 BFA2 BFA2 X X X BFA2 BFA2
BA1 BFA1 BFA1 X X X BFA1 BFA1
BA0 BFA0 BFA0 X X X BFA0 BFA0

Device Status

Opcode: 57H

After

  1. Main Memory Page to Buffer Transfer
  2. Main Memory Page to Buffer Compare,
  3. Buffer to Main Memory Page Program with Built-In Erase,
  4. Buffer to Main Memory Page Program without Built-In Erase
  5. Main Memory Page Program
  6. Auto Page Rewrite.

Check the device status by sending opcode 57H and then clocking bit 7 (the MSB) of the status register back out on the SO pin. If bit 7 is a 1, then the device is not busy and is ready to accept the next command. If bit 7 is a 0, then the device is in a busy state.

The user can continuously poll bit 7 of the status register by stopping SCK once bit 7 has been output. The status of bit 7 will continue to be output on the SO pin, and once the device is no longer busy, the state of SO will change from 0 to 1.

file: /Techref/atmel/at45d081.htm, 9KB, , updated: 1999/6/25 06:41, local time: 2024/11/22 08:58,
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