MC68HC908LJ24 Datasheet, PDF (268/464 Pages) Motorola, Inc – Microcontrollers

Freescale Semiconductor, Inc.
Infrared Serial Communications
Table 13-5 shows a summary of I/O pin functions when the SCI is
enabled.
Table 13-5. SCI Pin Functions (Standard and Infrared)
SCC1 SCIRCR SCC2
[ENSCI] [IREN]
[TE]
SCC2
[RE]
1
0
0
0
1
0
0
1
1
0
1
0
1
0
1
1
1
1
0
0
1
1
0
1
1
1
1
0
1
1
1
1
0
X
X
X
Notes:
1. After completion of transmission in progress.
TxD Pin
RxD Pin
Hi-Z⁽¹⁾
Input ignored (terminate externally)
Hi-Z⁽¹⁾
Input sampled, pin should idle high
Output SCI (idle high)
Input ignored (terminate externally)
Output SCI (idle high)
Input sampled, pin should idle high
Hi-Z⁽¹⁾
Input ignored (terminate externally)
Hi-Z⁽¹⁾
Input sampled, pin should idle high
Output IR SCI (idle high) Input ignored (terminate externally)
Output IR SCI (idle high) Input sampled, pin should idle high
Pins under port control (standard I/O port)
13.11 I/O Registers
The following I/O registers control and monitor SCI operation:
• SCI control register 1 (SCC1)
• SCI control register 2 (SCC2)
• SCI control register 3 (SCC3)
• SCI status register 1 (SCS1)
• SCI status register 2 (SCS2)
• SCI data register (SCDR)
• SCI baud rate register (SCBR)
• SCI infrared control register (SCIRCR)
Data Sheet
268
MC68HC908LJ24/LK24 — Rev. 2
Infrared Serial Communications Interface Module (IRSCI)
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