AT91SAM7A1-AU Atmel, AT91SAM7A1-AU Datasheet - Page 250

• 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: -

22.6.24
Name:
Access:
Address:
• TD[15:0]: Transmit Data
Data that is to be transmitted by the SPI is stored in this register. Information to be transmitted must be written to the trans-
mit data register in a right-justified format.
• PCS[3:0]: Peripheral Chip Select
This field is only used if multiple peripheral select is active (PS = 1).
If PCSDEC = 0:
where x = don't care.
If PCSDEC = 1:
250
PCS[3:0] = xxx0
PCS[3:0] = xx01
PCS[3:0] = x011
PCS[3:0] = 0111
PCS[3:0] = 1111
NPCS[3:0] output signals = PCS[3:0].
31
23
15
–
–
7
AT91SAM7A1
SPI Transmit Data Register
SPI_TDR
Write-only
0xFFFB4084
30
22
14
–
–
6
NPCS[3:0] = 1110
NPCS[3:0] = 1101
NPCS[3:0] = 1011
NPCS[3:0] = 0111
forbidden (no peripheral is selected)
29
21
13
–
–
5
28
20
12
–
–
4
TD
TD
27
19
11
–
3
26
18
10
–
2
PCS
25
17
–
9
1
6048B–ATARM–29-Jun-06
24
16
–
8
0