mc68hc908mr24 Freescale Semiconductor, Inc, mc68hc908mr24 Datasheet - Page 317

• Manufacturer Part Number: mc68hc908mr24
• Description: M68hc08 Microcontrollers
• Manufacturer: Freescale Semiconductor, Inc

14.8.6 SCI Data Register
14.8.7 SCI Baud Rate Register
MC68HC908MR24 — Rev. 4.1
Freescale Semiconductor
Address:
Address:
The SCI data register (SCDR) 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.
R7/T7:R0/T0 — Receive/Transmit Data Bits
The baud rate register (SCBR) selects the baud rate for both the receiver
and the transmitter.
Reset:
Reset:
Read:
Read:
Write:
Write:
Reading address $003D accesses the read-only received data bits,
R7:R0. Writing to address $003D writes the data to be transmitted,
T7:T0. Reset has no effect on the SCI data register.
Serial Communications Interface Module (SCI)
$003D
$003E
Bit 7
Bit 7
R7
T7
R
R
0
0
Figure 14-14. SCI Baud Rate Register (SCBR)
Figure 14-13. SCI Data Register (SCDR)
= Reserved
R6
T6
R
6
6
0
0
SCP1
R5
T5
5
5
0
Unaffected by reset
Serial Communications Interface Module (SCI)
SCP0
R4
T4
4
4
0
R3
T3
R
3
3
0
0
SCR2
R2
T2
2
2
0
Advance Information
SCR1
R1
T1
1
1
0
SCR0
Bit 0
Bit 0
R0
T0
0
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