mc68hc908gr8a Freescale Semiconductor, Inc, mc68hc908gr8a Datasheet - Page 155
mc68hc908gr8a
Manufacturer Part Number
mc68hc908gr8a
Description
M68hc08 Microcontrollers Microcontroller
Manufacturer
Freescale Semiconductor, Inc
Datasheet
1.MC68HC908GR8A.pdf
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SCR2–SCR0 — SCI Baud Rate Select Bits
Use this formula to calculate the SCI baud rate:
where:
Table 13-8
selected as SCI clock source.
Freescale Semiconductor
These read/write bits select the SCI baud rate divisor as shown in
SCR2–SCR0.
SCI clock source = f
PD = prescaler divisor
BD = baud rate divisor
shows the SCI baud rates that can be generated with a 4.9152-MHz bus clock when f
BUS
SCR2, SCR1, and SCR0
MC68HC908GR8A • MC68HC908GR4A Data Sheet, Rev. 5
or CGMXCLK (selected by SCIBDSRC bit in CONFIG2)
Baud rate
Table 13-7. SCI Baud Rate Selection
000
001
010
011
100
101
110
111
=
SCI clock source
-------------------------------------------- -
64
×
PD
×
BD
Baud Rate Divisor (BD)
128
16
32
64
1
2
4
8
Table
13-7. Reset clears
I/O Registers
BUS
155
is
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