mc68hc908ap8cfa Freescale Semiconductor, Inc, mc68hc908ap8cfa Datasheet - Page 207

• Manufacturer Part Number: mc68hc908ap8cfa
• Description: M68hc08 Microcontrollers
• Manufacturer: Freescale Semiconductor, Inc

SCR2–SCR0 — SCI Baud Rate Select Bits
Use this formula to calculate the SCI baud rate:
where:
Table 12-9
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
(selected by CKS bit)
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
SCR2, SCR1, and SCR0
BUS
SCP1 and SCP0
or CGMXCLK
baud rate
Table 12-8. IRSCI Baud Rate Selection
000
001
010
011
100
101
110
111
Table 12-7. SCI Baud Rate Prescaling
00
01
10
11
MC68HC908AP Family Data Sheet, Rev. 4
=
SCI clock source
-------------------------------------------- -
16 PD BD
×
×
Baud Rate Divisor (BD)
Prescaler Divisor (PD)
128
13
16
32
64
1
3
4
1
2
4
8
Table
12-8. Reset clears
I/O Registers
BUS
207
is