MC68HC908GR4 MOTOROLA [Motorola, Inc], MC68HC908GR4 Datasheet - Page 265

• Manufacturer Part Number: MC68HC908GR4
• Description: Microcontrollers
• Manufacturer: MOTOROLA [Motorola, Inc]

18.9.6 SCI Data Register
18.9.7 SCI Baud Rate Register
MC68HC908GR8 — Rev 4.0
MOTOROLA
NOTE:
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
Do not use read/modify/write instructions on the SCI data register.
The baud rate register (SCBR) selects the baud rate for both the receiver
and the transmitter.
Reset:
Reset:
Read:
Read:
Write:
Write:
Freescale Semiconductor, Inc.
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.
For More Information On This Product,
Serial Communications Interface (SCI)
$0018
$0019
Bit 7
Bit 7
R7
T7
0
Figure 18-16. SCI Baud Rate Register (SCBR)
Go to: www.freescale.com
Figure 18-15. SCI Data Register (SCDR)
= Unimplemented
R6
T6
6
6
0
SCP1
R5
T5
5
5
0
Unaffected by reset
SCP0
R4
T4
4
4
0
Serial Communications Interface (SCI)
R3
T3
R
R
3
3
0
= Reserved
SCR2
R2
T2
2
2
0
SCR1
R1
T1
1
1
0
Technical Data
I/O Registers
SCR0
Bit 0
Bit 0
R0
T0
0
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