MC908AS60ACFU Datasheet, PDF (202/414 Pages) Freescale Semiconductor, Inc – M68HC08 Microcontrollers

Serial Communications Interface (SCI)
Table 18-10. SCI Baud Rate Selection
SCR[2:1:0]
000
001
010
011
100
101
110
111
Baud Rate Divisor (BD)
1
2
4
8
16
32
64
128
Use the following formula to calculate the SCI baud rate:
Baud rate = _{6----4----f-×}-C---P--r--y-D--s---t-_×-a---lB-----D---
where:
f_Crystal = crystal frequency
PD = prescaler divisor
BD = baud rate divisor
Table 18-11 shows the SCI baud rates that can be generated with a 4.9152-MHz crystal.
MC68HC908AZ60A • MC68HC908AS60A • MC68HC908AS60E Data Sheet, Rev. 6
202
Freescale Semiconductor