AT91SAM7A1-AU Atmel, AT91SAM7A1-AU Datasheet - Page 81

• Manufacturer Part Number: AT91SAM7A1-AU
• Description: IC ARM7 MCU 32BIT ROMLESS144LQFP
• Manufacturer: Atmel
• Series: AT91SAMr

Specifications of AT91SAM7A1-AU

• Core Processor: ARM7
• Core Size: 16/32-Bit
• Speed: 40MHz
• Connectivity: CAN, EBI/EMI, SPI, UART/USART
• Peripherals: POR, PWM, WDT
• Number Of I /o: 49
• Program Memory Type: ROMless
• Ram Size: 4K x 8
• Voltage - Supply (vcc/vdd): 3 V ~ 3.6 V
• Data Converters: A/D 8x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 144-LQFP
• For Use With: AT91SAM7A1-EK - BOARD EVAL FOR AT91SAM7A1
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Program Memory Size: -

AT91SAM7A1
• HPCV[4:0]: High Preload Counter Value
Counter is preloaded when watchdog counter is restarted with bits 10 to 0 set to 0x7FF and bits 15 to 11 equal to
11
HPCV[4:0] (i.e., the counter value is (HPCV[4:0] x 2
) + 0x7FF).
• CKEY[7:0]: Clock Access Key
Used only when writing in WD_MR. CKEY is read as 0.
Write access in WD_MR is allowed only if CKEY[7:0] = 0x37.
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