SAM3A8C Atmel Corporation, SAM3A8C Datasheet - Page 319

• Manufacturer Part Number: SAM3A8C
• Manufacturer: Atmel Corporation

20.2.5.1
20.2.5.2
11057A–ATARM–17-Feb-12
11057A–ATARM–17-Feb-12
Flash Read Command
Flash Write Command
This command is used to read the contents of the Flash memory. The read command can start
at any valid address in the memory plane and is optimized for consecutive reads. Read hand-
shaking can be chained; an internal address buffer is automatically increased.
Table 20-7.
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 corresponds to a Flash memory page. The load buffer is automatically flushed to the
Flash:
The Write Page command (WP) is optimized for consecutive writes. Write handshaking can be
chained; an internal address buffer is automatically increased.
Table 20-8.
Step
1
2
3
4
5
...
n
n+1
n+2
n+3
...
Step
1
2
3
4
5
...
n
n+1
• before access to any page other than the current one
• when a new command is validated (MODE = CMDE)
Handshake Sequence
Write handshaking
Write handshaking
Write handshaking
Read handshaking
Read handshaking
...
Write handshaking
Write handshaking
Read handshaking
Read handshaking
...
Handshake Sequence
Write handshaking
Write handshaking
Write handshaking
Write handshaking
Write handshaking
...
Write handshaking
Write handshaking
Read Command
Write Command
ADDR1
...
ADDR1
MODE[3:0]
ADDR1
MODE[3:0]
CMDE
ADDR0
DATA
DATA
ADDR0
CMDE
ADDR0
ADDR1
DATA
DATA
...
ADDR0
DATA
DATA
...
DATA[15:0]
WP or WPL or EWP or EWPL
Memory Address LSB
Memory Address
*Memory Address++
*Memory Address++
...
Memory Address LSB
Memory Address
DATA[15:0]
READ
Memory Address LSB
Memory Address
*Memory Address++
*Memory Address++
...
Memory Address LSB
Memory Address
*Memory Address++
*Memory Address++
...
SAM3X/A
SAM3X/A
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