MC68HC908LJ24 Datasheet, PDF (285/464 Pages) Motorola, Inc – Microcontrollers

Freescale Semiconductor, Inc.
Infrared Serial Communications Interface Module (IRSCI)
I/O Registers
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
Address: $001A
Bit 7
6
5
4
3
2
1
Bit 0
Read:
0
0
0
R
R
TNP1 TNP0 IREN
Write:
Reset: 0
0
0
0
0
0
0
0
= Unimplemented
R = Reserved
Figure 13-20. SCI Infrared Control Register (SCIRCR)
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.
Table 13-10. Infrared Narrow Pulse Selection
TNP1 and TNP0
00
01
10
11
Prescaler Divisor (PD)
SCI transmits a 3/16 narrow pulse
SCI transmits a 1/16 narrow pulse
SCI transmits a 1/32 narrow pulse
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
MC68HC908LJ24/LK24 — Rev. 2
MOTOROLA
Infrared Serial Communications Interface Module (IRSCI)
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Data Sheet
285