MC68HC908LJ24 Datasheet, PDF (281/464 Pages) Motorola, Inc – Microcontrollers

Infrared Serial Communications Interface Module (IRSCI)
I/O Registers
13.11.6 SCI Data Register
The SCI data register is the buffer between the internal data bus and the
receive and transmit shift registers. Reset has no effect on data in the
SCI data register.
Address: $0018
Bit 7
6
5
4
3
2
1
Bit 0
Read: R7
R6
R5
R4
R3
R2
R1
R0
Write: T7
T6
T5
T4
T3
T2
T1
T0
Reset:
Unaffected by reset
Figure 13-18. SCI Data Register (SCDR)
R7/T7–R0/T0 — Receive/Transmit Data Bits
Reading the SCDR accesses the read-only received data bits,
R7–R0. Writing to the SCDR writes the data to be transmitted, T7–T0.
Reset has no effect on the SCDR.
NOTE: Do not use read/modify/write instructions on the SCI data register.
MC68HC908LJ24/LK24 — Rev. 2.1
Freescale Semiconductor Infrared Serial Communications Interface Module (IRSCI)
Data Sheet
281