AT91SAM7A1-AU Atmel, AT91SAM7A1-AU Datasheet - Page 242

• 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: -

22.6.17
Name:
Access:
Address:
• SWRST: SPI Software Reset
0: No effect.
1: Resets the SPI.
A software-triggered hardware reset of the SPI is performed. It resets all the registers, including PIO and PMC registers
(except SPI_PMSR).
• SPIEN: SPI Enable
0: No effect.
1: Enables the SPI.
This enables the SPI to transfer and receive data.
• SPIDIS: SPI Disable
0: No effect.
1: Disables the SPI.
All pins will be set to input mode and no data is received or transmitted.
In case a transfer is in progress, the transfer is finished before the SPI is disabled.
In case both SPIEN and SPIDIS are equal to one when the control register is written, the SPI is disabled.
242
31
23
15
–
–
–
7
–
AT91SAM7A1
SPI Control Register
SPI_CR
Write-only
0xFFFB4060
30
22
14
–
–
–
6
–
29
21
13
–
–
–
5
–
28
20
12
–
–
–
4
–
27
19
11
–
–
–
3
–
SPIDIS
26
18
10
–
–
–
2
SPIEN
25
17
–
–
9
–
1
6048B–ATARM–29-Jun-06
SWRST
24
16
–
–
8
–
0