MC68HC08AS32 Datasheet, PDF (270/394 Pages) Motorola, Inc – M68HC08 Family of 8-bit microcontroller units (MCUs)

Serial Communications Interface (SCI)
17.9.6 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 17-12. SCI Data Register (SCDR)
R7/T7–R0/T0 — Receive/Transmit Data Bits
Reading address $0018 accesses the read-only received data bits,
R7–R0. Writing to address $0018 writes the data to be transmitted,
T7–T0. Reset has no effect on the SCI data register.
Advance Information
270
Serial Communications Interface (SCI)
MC68HC08AS32 — Rev. 3.0
MOTOROLA