Dspi Status Register (Dspi_Sr) - Freescale Semiconductor MCF54455 Reference Manual

DMA Serial Peripheral Interface (DSPI)
Field
3–0
Baud rate scaler. Selects the scaler value for the baud rate. This field is only used in master mode. The pre-scaled
BR system clock is divided by the baud rate scaler to generate the frequency of the DSPI_SCK. The table below lists
the baud rate scaler values.
Note: See Section 31.4.3.1, "Baud Rate
31.3.4

DSPI Status Register (DSPI_SR)

The DSPI_SR contains status and flag bits. The bits reflect the status of the DSPI and indicate the
occurrence of events that can generate interrupt or DMA requests. Software can clear flag bits in the
DSPI_SR by writing a 1 to it. Writing a 0 to a flag bit has no effect.
Address 0xFC05_C02C (DSPI_SR)
:
31 30 29
R TCF TXRXS 0
W w1c
Reset 0 0 0
15 14 13
R TXCTR
W
Reset 0 0 0
31-14
Table 31-5. DSPI_CTARn Field Description (continued)
Baud Rate Scaler
BR
Value
0000 2
0001 4
0010 6
0011 8
0100 16
0101 32
0110 64
0111 128
Generator," for more details on calculating the baud rate.
28 27 26 25
EOQF TFUF 0 TFFF
w1c w1c w1c
0 0 0 0
12 11 10 9
TXNXTPTR
0 0 0 0
Figure 31-5. DSPI Status Register (DSPI_SR)
Description
Baud Rate Scaler
BR
Value
1000 256
1001 512
1010 1024
1011 2048
1100 4096
1101 8192
1110 16384
1111 32768
24 23 22 21 20
0 0 0 0 0
0 0 0 0 0
8 7 6 5
RXCTR
0 0 0 0 0
Access: User Read/Write
19 18 17 16
RFOF 0 RFDF
w1c w1c
0 0 0
4 3 2 1
POPNXTPTR
0 0 0
Freescale Semiconductor
0
0
0
0