Datasheet

Infrared Serial Communications Interface Module (IRSCI)
MC68HC908LJ12 — Rev. 2.1 Technical Data
Freescale Semiconductor Infrared Serial Communications Interface Module (IRSCI) 267
13.11.8 SCI Infrared Control Register
The infrared control register contains the control bits for the infrared sub-
module.
• Enables the infrared sub-module
• Selects the infrared transmitter narrow pulse width
TNP1 and TNP0 — Transmitter Narrow Pulse Bits
These read/write bits select the infrared transmitter narrow pulse
width as shown in Table 13-10. Reset clears TNP1 and TNP0.
IREN — Infrared Enable Bit
This read/write bit enables the infrared sub-module for encoding and
decoding the SCI data stream. When this bit is clear, the infrared sub-
module is disabled. Reset clears the IREN bit.
1 = infrared sub-module enabled
0 = infrared sub-module disabled
Address: $001A
Bit 7654321Bit 0
Read:
R
000
R TNP1 TNP0 IREN
Write:
Reset:00000000
= Unimplemented R = Reserved
Figure 13-20. SCI Infrared Control Register (SCIRCR)
Table 13-10. Infrared Narrow Pulse Selection
TNP1 and TNP0 Prescaler Divisor (PD)
00 SCI transmits a 3/16 narrow pulse
01 SCI transmits a 1/16 narrow pulse
10
SCI transmits a 1/32 narrow pulse
11