PIC16C74B-04I/P【PDF 40/184 页】IC MCU OTP 4KX14 A/D PWM 40DIP

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134

SAM7S Series [DATASHEET]

6175M–ATARM–26-Oct-12

Power-off the chip

Power-on the chip with TST = 0

Assert Erase during a period of more than 220 ms

Power-off the chip

Then it is possible o return to FFPI mode and check that Flash is erased.

20.2.5.7

SAM7S512 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.

20.2.5.8

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. Write handshaking can be chained; an

internal address buffer is automatically increased.

Table 20-16. Select EFC Command

Step

Handshake Sequence

MODE[3:0]

DATA[15:0]

Write handshaking

CMDE

SEFC

Write handshaking

DATA

0 = Select EFC0

1 = Select EFC1

Table 20-17. Write Command

Step

Handshake Sequence

MODE[3:0]

DATA[15:0]

Write handshaking

CMDE

WRAM

Write handshaking

ADDR0

Memory Address LSB

Write handshaking

ADDR1

Memory Address

Write handshaking

DATA

*Memory Address++

Write handshaking

DATA

*Memory Address++

...

Write handshaking

ADDR0

Memory Address LSB

n+1

Write handshaking

ADDR1

Memory Address

n+2

Write handshaking

DATA

*Memory Address++

n+3

Write handshaking

DATA

*Memory Address++

...

Table 20-18. Write Command

Step

Handshake Sequence

MODE[3:0]

DATA[7:0]

Write handshaking

CMDE

WRAM

Write handshaking

ADDR0

Memory Address LSB

Write handshaking

ADDR1

Memory Address

Write handshaking

ADDR2

Memory Address

Write handshaking

ADDR3

Memory Address

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