Datasheet

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]
1 Write handshaking CMDE WP or WPL or EWP or EWPL
2 Write handshaking ADDR0 Memory Address LSB
3 Write handshaking ADDR1 Memory Address
4 Write handshaking DATA *Memory Address++
5 Write handshaking DATA *Memory Address++
... ... ... ...
n 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]
1 Write handshaking CMDE WP or WPL or EWP or EWPL
2 Write handshaking ADDR0 Memory Address LSB
3 Write handshaking ADDR1 Memory Address
4 Write handshaking ADDR2 Memory Address
5 Write handshaking ADDR3 Memory Address
6 Write handshaking DATA *Memory Address++
7 Write handshaking DATA *Memory Address++