Freescale Semiconductor MPC5200B User Manual page 519

PSC Registers—MBAR + 0x2000, 0x2200, 0x2400, 0x2600, 0x2800, 0x2C00
Bit Name
3 TxCTS UART / SIR—Transmitter clear-to-send—If both TxCTS and TxRTS are enabled, TxCTS controls the
operation of the transmitter. TxCTS is not used in Codec mode.
0 = CTS has no effect on the transmitter.
1 = Enables clear-to-send operation. The transmitter checks the state of CTS each time it is ready
to send a character.
If CTS is asserted, the character is sent
If it is negated, the channel TxD remains in a high state and transmission is delayed until CTS is
asserted.
Changes in CTS as a character is being sent do not affect its transmission.
other Modes—Reserved
4:7 SB UART—Stop-Bit (length control)—Selects the stop bit length that is appended to the transmitted
character. Stop-bit lengths of 9/16th to 2 bits are programmable for 6-, 8-bit characters. Lengths of 1
1/16th to 2 bits are programmable for 5-bit characters. In all cases, the receiver checks only for a high
condition at the center of the first stop-bit position, that is, one bit-time after the last data bit or after
the parity bit, if parity is enabled. Therefore the receiver doesn't support a stop bit length less than
one. Not used in Codec mode, see
other Modes—Reserved
SB 5 Bits
0000 1.063
0001 1.125
0010 1.188
0011 1.250
15.2.3 Status Register (0x04)
The read-only SR register shows status of the transmitter, the receiver, and the FIFO.
msb 0 1
R RB FE
W
RESET: 0 0
msb 0 1
R RB FE
W
RESET: 0 0
15-8
Table 15-9. Stop-Bit Lengths
6–8 Bits SB 5 Bits
0.563 0100 1.313
0.625 0101 1.375
0.688 0110 1.438
0.750 0111 1.500
SR
—
Table 15-10. Status Register (0x04) for UART Mode
2 3 4 5 6
PE
0 0 0 0 0
Table 15-11. Status Register (0x04) for SIR Mode
2 3 4 5 6
PE
0 0 0 0 0
MPC5200B Users Guide, Rev. 1
Description
Table 15-9.
6–8 Bits SB
0.813 1000
0.875 1001
0.938 1010
1.000 1011
7 8 9 10
CDE Error
0 0 0 0
7 8 9 10
Error
0 0 0 0
5–8 Bits SB 5–8 Bits
1.563 1100 1.813
1.625 1101 1.875
1.688 1110 1.938
1.750 1111 2.000
11 12 13 14
Reserved
0 0 0 0
11 12 13 14
Reserved
0 0 0 0
Freescale Semiconductor
15 lsb
0
15 lsb
0