Deserial Serial Peripheral Interface (DSPI)
MPC5510 Microcontroller Family Reference Manual, Rev. 1
23-24
Freescale Semiconductor
Preliminary
23.3.2.9
DSPI Receive FIFO Registers 0–3 (DSPI_RXFRn)
The DSPI_RXFR
n
registers provide visibility into the RX FIFO for debugging purposes. Each register is
an entry in the RX FIFO. The DSPI_RXFR registers are read-only. Reading the DSPI_RXFR
n
registers
does not alter the state of the RX FIFO. The device uses four registers to implement the RX FIFO, that is
DSPI_RXFR0–DSPI_RXFR3 are used.
Offset: DSP
0x003C (DSPI_TXFR0)
0x0040 (DSPI_TXFR1)
0x0044 (DSPI_TXFR2)
0x0048 (DSPI_TXFR3)
Access: Read
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
R
TXCMD
W
Reset
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
R
TXDATA
W
Reset
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Figure 23-9. DSPI Transmit FIFO Register 0–3 (DSPI_TXFRn)
Table 23-9. DSPI_TXFRn Field Descriptions
Field
Description
TXCMD
Transmit Command. Contains the command that sets the transfer attributes for the SPI data. See
“DSPI PUSH TX FIFO Register (DSPI_PUSHR)
,” for details on the command field.
TXDATA Transmit Data. Contains the SPI data to be shifted out.