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1745D–ATARM–04-Nov-05
AT91M55800A
20.7.11 SPI Transmit Pointer Register
Name: SP_TPR
Access Type: Read/Write
Reset State: 0
Offset: 0x28
• TXPTR: Transmit Pointer
TXPTR must be loaded with the address of the transmit buffer.
20.7.12 SPI Transmit Counter Register
Name: SP_TCR
Access Type: Read/Write
Reset State: 0
Offset: 0x2C
• TXCTR: Transmit Counter
TXCTR must be loaded with the size of the transmit buffer.
0: Stop Peripheral Data Transfer dedicated to the transmitter.
1 - 65535: Start Peripheral Data transfer if TDRE is active.
31 30 29 28 27 26 25 24
TXPTR
23 22 21 20 19 18 17 16
TXPTR
15 14 13 12 11 10 9 8
TXPTR
7 6 5 4 3 2 1 0
TXPTR
31 30 29 28 27 26 25 24
– – – – – – – –
23 22 21 20 19 18 17 16
– – – – – – – –
15 14 13 12 11 10 9 8
TXCTR
7 6 5 4 3 2 1 0
TXCTR