PXD20RM Datasheet, PDF (309/1628 Pages) Freescale Semiconductor, Inc – PXD20 Microcontroller

Table 10-15. DSPIx_POPR Field Descriptions
Field
Description
0–15 Reserved, must be cleared.
16–31 Received data. The RXDATA field contains the SPI data from the RX FIFO entry pointed to by the pop
RXDATA next data pointer (POPNXTPTR).
[0:15]
10.8.2.8 DSPI Transmit FIFO Registers 0–4 (DSPIx_TXFRn)
The DSPIx_TXFRn registers provide visibility into the TX FIFO for debugging purposes. Each register is
an entry in the TX FIFO. The registers are read-only and cannot be modified. Reading the DSPIx_TXFRn
registers does not alter the state of the TX FIFO.
Address:
Base + 0x003C (DSPIx_TXFR0)
Base + 0x0040 (DSPIx_TXFR1)
Base + 0x0044 (DSPIx_TXFR2)
Base + 0x0048 (DSPIx_TXFR3)
Base + 0x004C (DSPIx_TXFR4)
Access: R/O
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 10-9. DSPI Transmit FIFO Register 0–4 (DSPIx_TXFRn)
Table 10-16 describes the fields in the DSPI transmit FIFO register.
Table 10-16. DSPIx_TXFRn field descriptions
Field
Description
TXCMD Transmit command. Contains the command that sets the transfer attributes for the SPI data. Refer to
Section 10.8.2.6, DSPI PUSH TX FIFO Register (DSPIx_PUSHR), for details on the command field.
TXDATA Transmit data. Contains the SPI data to be shifted out.
10.8.2.9 DSPI Receive FIFO Registers 0–4 (DSPIx_RXFRn)
The DSPIx_RXFRn registers provide visibility into the RX FIFO for debugging purposes. Each register is
an entry in the RX FIFO. The DSPIx_RXFR registers are read-only. Reading the DSPIx_RXFRn registers
does not alter the state of the RX FIFO.
Freescale Semiconductor
PXD20 Microcontroller Reference Manual, Rev. 1
Preliminary—Subject to Change Without Notice
10-23