PIC16C74B-04I/P【PDF 37/184 页】IC MCU OTP 4KX14 A/D PWM 40DIP

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131

SAM7S Series [DATASHEET]

6175M–ATARM–26-Oct-12

20.2.5.2

Flash Write Command

This command is used to write the Flash contents.

The Flash memory plane is organized into several pages. Data to be written are stored in a load buffer that corre-

sponds to a Flash memory page. The load buffer is automatically flushed to the Flash:

before access to any page other than the current one

when a new command is validated (MODE = CMDE)

The Write Page command (WP) is optimized for consecutive writes. Write handshaking can be chained; an inter-

nal address buffer is automatically increased.

n+2

Write handshaking

ADDR2

Memory Address

n+3

Write handshaking

ADDR3

Memory Address

n+4

Read handshaking

DATA

*Memory Address++

n+5

Read handshaking

DATA

*Memory Address++

...

Table 20-7.

Read Command (Continued)

Step

Handshake Sequence

MODE[3:0]

DATA[7:0]

Table 20-8.

Write Command

Step

Handshake Sequence

MODE[3:0]

DATA[15:0]

Write handshaking

CMDE

WP or WPL or EWP or EWPL

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 20-9.

Write Command

Step

Handshake Sequence

MODE[3:0]

DATA[7:0]

Write handshaking

CMDE

WP or WPL or EWP or EWPL

Write handshaking

ADDR0

Memory Address LSB

Write handshaking

ADDR1

Memory Address

Write handshaking

ADDR2

Memory Address

Write handshaking

ADDR3

Memory Address

Write handshaking

DATA

*Memory Address++

Write handshaking

DATA

*Memory Address++

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