Freescale Semiconductor, Inc.
Serial Communications Interface (SCI)
10.6.5 Baud Rate Register
The baud rate register shown in Figure 10-9 selects the baud rate for
both the receiver and the transmitter.
Address: $000D
Bit 7
U
6
5
SCP1
0
4
SCP0
0
3
2
SCR2
U
1
SCR1
U
Bit 0
SCR0
U
Read:
Write:
Reset:
U
U
= Unimplemented
U = Unaffected
Figure 10-9. Baud Rate Register (Baud)
SCP1 and SCP0 — SCI Prescaler Select Bits
These read/write bits control prescaling of the baud rate generator
clock, as shown in Table 10-1. Resets clear both SCP1 and SCP0.
Table 10-1. Baud Rate Generator Clock Prescaling
SCP[1:0]
Baud Rate Generator Clock
Internal clock ÷ 1
00
01
10
11
Internal clock ÷ 3
Internal clock ÷ 4
Internal clock ÷ 13
Technical Data
136
MC68HC705C8A — Rev. 3
Serial Communications Interface (SCI)
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