MC68HC908JG16 Datasheet, PDF (241/324 Pages) Motorola, Inc – Microcontrollers

Serial Communications Interface Module (SCI)
I/O Registers
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.
MC68HC908JG16 — Rev. 1.1
Freescale Semiconductor
Serial Communications Interface Module (SCI)
Technical Data
241