at91cap7e ATMEL Corporation, at91cap7e Datasheet - Page 330

• Manufacturer Part Number: at91cap7e
• Description: Customizable Microcontroller
• Manufacturer: ATMEL Corporation

28.7.1
Name:
Access Type:
• SPIEN: SPI Enable
0 = No effect.
1 = Enables the SPI to transfer and receive data.
• SPIDIS: SPI Disable
0 = No effect.
1 = Disables the SPI.
As soon as SPIDIS is set, SPI finishes its tranfer.
All pins are set in input mode and no data is received or transmitted.
If a transfer is in progress, the transfer is finished before the SPI is disabled.
If both SPIEN and SPIDIS are equal to one when the control register is written, the SPI is disabled.
• SWRST: SPI Software Reset
0 = No effect.
1 = Reset the SPI. A software-triggered hardware reset of the SPI interface is performed.
The SPI is in slave mode after software reset.
PDC channels are not affected by software reset.
• LASTXFER: Last Transfer
0 = No effect.
1 = The current NPCS will be deasserted after the character written in TD has been transferred. When CSAAT is set, this
allows to close the communication with the current serial peripheral by raising the corresponding NPCS line as soon as TD
transfer has completed.
330
SWRST
31
23
15
–
–
–
7
AT91CAP7E
SPI Control Register
30
22
14
–
–
–
6
–
29
21
13
–
–
–
5
–
SPI_CR
Write-only
28
20
12
–
–
–
4
–
27
19
11
–
–
–
–
3
26
18
10
–
–
–
2
–
SPIDIS
25
17
–
–
–
9
1
8549A–CAP–10/08
LASTXFER
SPIEN
24
16
–
8
–
0