Rainbow Electronics AT75C220 - Manual (Page 136)

AT75C220
136
SPI Receive Pointer Register
Register Name:SP_RPR
Access Type:Read/write
Reset Value:0x0
• RXPTR: Receive Pointer
RXPTR must be loaded with the address of the receive buffer.
SPI Receive Counter Register
Register Name:SP_CPR
Access Type:Read/write
Reset Value:0x0
• RXCTR: Receive Counter Register
RXCTR must be loaded with the size of the receive buffer.
0 = Stop peripheral data transfer
1 - 4294967295 = Start peripheral data transfer if RDRF is active.
31 30 29 28 27 26 25 24
RXPTR
23 22 21 20 19 18 17 16
RXPTR
15 14 13 12 11 10 9 8
RXPTR
7 6 5 4 3 2 1 0
RXPTR
31 30 29 28 27 26 25 24
RXCTR
23 22 21 20 19 18 17 16
RXCTR
15 14 13 12 11 10 9 8
RXCTR
7 6 5 4 3 2 1 0
RXCTR