AT91SAM7SE256B-AU Atmel, AT91SAM7SE256B-AU Datasheet - Page 121

• Manufacturer Part Number: AT91SAM7SE256B-AU
• Description: IC ARM7 MCU FLASH 256K 128-LQFP
• Manufacturer: Atmel
• Series: AT91SAMr

Specifications of AT91SAM7SE256B-AU

• Core Processor: ARM7
• Core Size: 16/32-Bit
• Speed: 55MHz
• Connectivity: EBI/EMI, I²C, SPI, SSC, UART/USART, USB
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Number Of I /o: 88
• Program Memory Size: 256KB (256K x 8)
• Program Memory Type: FLASH
• Ram Size: 32K x 8
• Voltage - Supply (vcc/vdd): 1.65 V ~ 1.95 V
• Data Converters: A/D 8x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: *
• Core: ARM7TDMI
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Lead Free Status / Rohs Status: Details

20.2.4.1
Table 20-4.
6222F–ATARM–14-Jan-11
Step
1
2
3
4
5
6
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
Write Handshaking
Write Handshake
For details on the write handshaking sequence, refer to
Figure 20-2. Parallel Programming Timing, Write Sequence
MODE[3:0]
DATA[15:0]
NVALID
NCMD
NOE
RDY
1
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
2
3
SAM7SE512/256/32 Preliminary
4
Figure
20-2and
5
Data I/O
Input
Input
Input
Input
Input
Input
Table
20-4.
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