MC908JB16DWE Datasheet, PDF (243/332 Pages) Freescale Semiconductor, Inc – Microcontrollers

Serial Communications Interface Module (SCI)
12.9.6 SCI Data Register
The SCI data register (SCDR) is the buffer between the internal data bus
and the receive and transmit shift registers.
Address: $005F
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 12-15. SCI Data Register (SCDR)
R7/T7–R0/T0 — Receive/Transmit Data Bits
Reading the SCI data register accesses the read-only received data
bits, R7:R0. Writing to the SCI data register writes the data to be
transmitted, T7:T0. Reset has no effect on the SCI data register.
NOTE: Do not use read/modify/write instructions on the SCI data register.
MC68HC908JB16 — Rev. 1.1
Freescale Semiconductor
Serial Communications Interface Module (SCI)
Technical Data
243