MC68HC908LJ24 Datasheet, PDF (282/464 Pages) Motorola, Inc – Microcontrollers

Infrared Serial Communications
13.11.7 SCI Baud Rate Register
The baud rate register selects the baud rate for both the receiver and the
transmitter.
Address:
Read:
Write:
Reset:
$0019
Bit 7
CKS
0
6
5
0
SCP1
0
0
= Unimplemented
4
SCP0
0
3
2
1
R
SCR2 SCR1
0
0
0
R = Reserved
Figure 13-19. SCI Baud Rate Register (SCBR)
Bit 0
SCR0
0
CKS — Baud Clock Input Select
This read/write bit selects the source clock for the baud rate
generator. Reset clears the CKS bit, selecting CGMXCLK.
1 = Bus clock drives the baud rate generator
0 = CGMXCLK drives the baud rate generator
SCP1 and SCP0 — SCI Baud Rate Prescaler Bits
These read/write bits select the baud rate prescaler divisor as shown
in Table 13-7. Reset clears SCP1 and SCP0.
Table 13-7. SCI Baud Rate Prescaling
SCP1 and SCP0
00
01
10
11
Prescaler Divisor (PD)
1
3
4
13
SCR2–SCR0 — SCI Baud Rate Select Bits
These read/write bits select the SCI baud rate divisor as shown in
Table 13-8. Reset clears SCR2–SCR0.
Data Sheet
282
MC68HC908LJ24/LK24 — Rev. 2.1
Infrared Serial Communications Interface Module (IRSCI) Freescale Semiconductor