Freescale Semiconductor MPC5200B - Manual (Page 545)

MPC5200B Users Guide, Rev. 1
15-34 Freescale Semiconductor
PSC Registers—MBAR + 0x2000, 0x2200, 0x2400, 0x2600, 0x2800, 0x2C00
15.2.25 Infrared SIR Divide Register (0x4C)—IRSDR
This register set the SIR pulse width. To set the SIR mode Baud rate see Section 15.2.12, Counter Timer Upper Register (0x18)—CTUR . This
register is reserved in other modes.
Table 15-47. Infrared Control 2 (0x48) for MIR/FIR Modes
msb 0 1 2 3 4 5 6 7 lsb
R Reserved SIPREQ ABORT NXTEOF
W
RESET: 0 0 0 0 0 0 0 0
Table 15-48. Infrared Control 2 (0x48) for other Modes
msb 0 1 2 3 4 5 6 7 lsb
R Reserved
W
RESET: 0 0 0 0 0 0 0 0
Bit Name Description
0:4 — Reserved
5 SIPREQ MIR / FIR—Request to send SIP
0 = No operation
1 = If the TX becomes idle state, the TX starts to send one SIP pulse. This bit keeps high
until the TX finishes sending a SIP and becomes low automatically when the TX finishes
sending a SIP.
For more informations about the SIP pulse see also Figure 15-20.
other Modes—Reserved
6 ABORT MIR / FIR— Abort output
0 = Stop sending abort sequence.
1 = While the TX is sending data or CRC, writing 1 to this bit causes the TX immediately
start to output abort sequence (2 or more illegal symbol “0000” in FIR mode, or 7 or more
consecutive 1 in MIR mode). Before the next frame is transmitted, this bit must be reset.
other Modes—Reserved
7 NXTEOF SIR / MIR / FIR— Next is the last byte. This bit works independent form the mode. For other
modes which support the framing, like SPI, you can also use this bit to mark the last bit of
frame.
0 = The next write data is not the last byte in a frame.
1 = The next write data is the last byte in the current frame. When the processor performs
a write to the TB, an EOF mark is added to the data in the TX-FIFO memory. This bit is
cleared after writing to the transmit buffer. This bit is usually set by IP bus write operation.
During the CommBus transfer, the signal transmit done line indicate the end of frame,
therefore this bit is not used by the CommBus write operation.
other Modes—Reserved