MC68HC908GP32 Datasheet, PDF (277/410 Pages) Motorola, Inc – M68HC08 Family of 8-bit microcontroller units (MCUs)

Freescale Semiconductor, Inc.
Serial Communications Interface Module (SCI)
I/O Registers
Table 18-7. SCI Baud Rate Selection
SCR2, SCR1, and SCR0
Baud Rate Divisor (BD)
000
1
001
2
010
4
011
8
100
16
101
32
110
64
111
128
Use this formula to calculate the SCI baud rate:
baud rate = ^{S----C-----I---c---l--o---c---k-----s---o---u---r--c---e--}
64 × PD × BD
where:
SCI clock source = f_BUS or CGMXCLK
(selected by SCIBDSRC bit in CONFIG2 register)
PD = prescaler divisor
BD = baud rate divisor
Table 18-8 shows the SCI baud rates that can be generated with a
4.9152-MHz bus clock when f_BUS is selected as SCI clock source.
MC68HC908GP32•MC68HC08GP32 — Rev. 6
MOTOROLA
Serial Communications Interface Module (SCI)
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Technical Data
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