MC68HC908JL8 MOTOROLA [Motorola, Inc], MC68HC908JL8 Datasheet - Page 204

• Manufacturer Part Number: MC68HC908JL8
• Description: Motorola reserves the right to make changes without further notice to any products herein
• Manufacturer: MOTOROLA [Motorola, Inc]

Serial Communications Interface (SCI)
11.9.6 SCI Data Register
11.9.7 SCI Baud Rate Register
Technical Data
204
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.
SCP1 and SCP0 — SCI Baud Rate Prescaler Bits
Reset:
Reset:
Read:
Read:
Write:
Write:
Freescale Semiconductor, Inc.
Reading the SCDR accesses the read-only received data bits, R[7:0].
Writing to the SCDR writes the data to be transmitted, T[7:0]. Reset
has no effect on the SCDR.
These read/write bits select the baud rate prescaler divisor as shown
in
For More Information On This Product,
Table
Serial Communications Interface (SCI)
$0018
$0019
Bit 7
Bit 7
R7
T7
0
0
Figure 11-16. SCI Baud Rate Register (SCBR)
11-6. Reset clears SCP1 and SCP0.
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Figure 11-15. SCI Data Register (SCDR)
= Unimplemented
R6
T6
6
6
0
0
SCP1
R5
T5
5
5
0
Unaffected by reset
SCP0
R4
T4
4
4
0
R3
T3
R
R
3
3
0
= Reserved
MC68HC908JL8
SCR2
R2
T2
2
2
0
SCR1
R1
T1
1
1
0
MOTOROLA
—
Rev. 2.0
SCR0
Bit 0
Bit 0
R0
T0
0