AT91SAM7S256D-AU Atmel, AT91SAM7S256D-AU Datasheet - Page 131
AT91SAM7S256D-AU
Manufacturer Part Number
AT91SAM7S256D-AU
Description
ARM Microcontrollers - MCU 256K Flash SRAM 64K ARM based MCU
Manufacturer
Atmel
Series
SAM7S256r
Datasheet
1.AT91SAM7S256D-AU.pdf
(775 pages)
Specifications of AT91SAM7S256D-AU
Rohs
yes
Core
ARM
Processor Series
AT91SAM
Data Bus Width
16 bit/32 bit
Maximum Clock Frequency
55 MHz
Program Memory Size
256 KB
Data Ram Size
64 KB
On-chip Adc
Yes
Operating Supply Voltage
3 V to 3.6 V
Operating Temperature Range
- 40 C to + 85 C
Package / Case
LQFP-64
Mounting Style
SMD/SMT
Interface Type
2-Wire, I2S, SPI, USART
Length
7 mm
Available stocks
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Manufacturer
Quantity
Price
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Part Number:
AT91SAM7S256D-AU
Manufacturer:
ATMEL
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101
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20.2.5.2
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 corre-
sponds 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 inter-
nal address buffer is automatically increased.
Table 20-8.
Table 20-9.
Step
n+2
n+3
n+4
n+5
...
Step
1
2
3
4
5
...
n
n+1
n+2
n+3
...
Step
1
2
3
4
5
6
7
• before access to any page other than the current one
• when a new command is validated (MODE = CMDE)
Flash Write Command
Handshake Sequence
Write handshaking
Write handshaking
Read handshaking
Read handshaking
...
Handshake Sequence
Write handshaking
Write handshaking
Write handshaking
Write handshaking
Write handshaking
...
Write handshaking
Write handshaking
Write handshaking
Write handshaking
...
Handshake Sequence
Write handshaking
Write handshaking
Write handshaking
Write handshaking
Write handshaking
Write handshaking
Write handshaking
Read Command (Continued)
Write Command
Write Command
MODE[3:0]
CMDE
ADDR0
ADDR1
DATA
DATA
...
ADDR0
ADDR1
DATA
DATA
...
MODE[3:0]
CMDE
ADDR0
ADDR1
ADDR2
ADDR3
DATA
DATA
MODE[3:0]
ADDR2
ADDR3
DATA
DATA
...
DATA[15:0]
WP or WPL or EWP or EWPL
...
...
DATA[7:0]
WP or WPL or EWP or EWPL
Memory Address LSB
Memory Address
Memory Address
Memory Address
*Memory Address++
*Memory Address++
Memory Address LSB
Memory Address
*Memory Address++
*Memory Address++
Memory Address LSB
Memory Address
*Memory Address++
*Memory Address++
Memory Address
Memory Address
*Memory Address++
*Memory Address++
...
DATA[7:0]
SAM7S Series [DATASHEET]
6175M–ATARM–26-Oct-12
131
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