SAM7X256_14 Datasheet, PDF (127/662 Pages) ATMEL Corporation – ARM-based Flash MCU

 Assert Erase during a period of more than 220 ms
 Power-off the chip
Then it is possible to return to FFPI mode and check that Flash is erased.
20.3.4.7 AT91SAM7X512 Select EFC Command
The commands WPx, EA, xLB, xFB are executed using the current EFC controller. The default EFC controller is EFC0.
The Select EFC command (SEFC) allows selection of the current EFC controller.
Table 20-28. Select EFC Command
Step Handshake Sequence
1
Write handshaking
2
Write handshaking
MODE[3:0]
CMDE
DATA
DATA[15:0]
SEFC
0 = Select EFC0
1 = Select EFC1
20.3.4.8 Memory Write Command
This command is used to perform a write access to any memory location.
The Memory Write command (WRAM) is optimized for consecutive writes. An internal address buffer is automatically
increased.
Table 20-29. Write Command
Read/Write
DR Data
Write
(Number of Words to Write) << 16 | (WRAM)
Write
Address
Write
Memory [address]
Write
Memory [address+4]
Write
Memory [address+8]
Write
Memory [address+(Number of Words to Write - 1)* 4]
20.3.4.9 Get Version Command
The Get Version (GVE) command retrieves the version of the FFPI interface.
Table 20-30. Get Version Command
Read/Write
DR Data
Write
GVE
Read
Version
SAM7X Series [DATASHEET]
6120K–ATARM–11-Feb-14
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