MC68HC08AS20 Datasheet, PDF (267/386 Pages) Freescale Semiconductor, Inc – M68HC08 Microcontrollers

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
Read: R7
R6
Write: T7
T6
Reset:
5
4
3
2
R5
R4
R3
R2
T5
T4
T3
T2
Unaffected by Reset
1
Bit 0
R1
R0
T1
T0
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.
MC68HC08AS20 — Rev. 4.1
Freescale Semiconductor
Advance Information
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