AT91SAM7S256D-AU Atmel, AT91SAM7S256D-AU Datasheet - Page 128

• Manufacturer Part Number: AT91SAM7S256D-AU
• Description: ARM Microcontrollers - MCU 256K Flash SRAM 64K ARM based MCU
• Manufacturer: Atmel
• Series: SAM7S256r

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

Table 20-4.
20.2.4.2
Figure 20-5.
Figure 20-6. SAM7S32/16 Parallel Programming Timing, Read Sequence
Step
1
2
3
4
5
6
For details on the read handshaking sequence, refer to
Programmer Action
Sets MODE and DATA signals
Clears NCMD signal
Waits for RDY low
Releases MODE and DATA signals
Sets NCMD signal
Waits for RDY high
Read Handshaking
Write Handshake
SAM7S542/256/128/321/161 Parallel Programming Timing, Read Sequence
MODE[3:0]
DATA[15:0]
MODE[3:0]
DATA[7:0]
NVALID
NVALID
NCMD
NCMD
NOE
NOE
RDY
RDY
1
1
2
2
Adress IN
Adress IN
ADDR
ADDR
3
3
Device Action
Waits for NCMD low
Latches MODE and DATA
Clears RDY signal
Executes command and polls NCMD high
Executes command and polls NCMD high
Sets RDY
4
4
5
5
Z
Z
Figure
6
6
7
7
20-5,
Data OUT
Data OUT
Figure 20-6
8
8
9
9
SAM7S Series [DATASHEET]
10
10
11
11
X
X
12
12
and
13
13
Table
IN
IN
Data I/O
Input
Input
Input
Input
Input
Input
6175M–ATARM–26-Oct-12
20-5.
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