mc68hc908mr32 Freescale Semiconductor, Inc, mc68hc908mr32 Datasheet - Page 178

• Manufacturer Part Number: mc68hc908mr32
• Description: M68hc08 Microcontrollers
• Manufacturer: Freescale Semiconductor, Inc

Serial Communications Interface Module (SCI)
SCR2–SCR0 — SCI Baud Rate Select Bits
Use this formula to calculate the SCI baud rate:
where:
Table 13-7
for an f
178
These read/write bits select the SCI baud rate divisor as shown in
SCR2–SCR0.
f
PD = prescaler divisor
BD = baud rate divisor
OP
= internal operating frequency
OP
of 7.3728 MHz and the CGM set for an f
shows the SCI baud rates that can be generated with a 4.9152-MHz crystal with the CGM set
Baud rate
MC68HC908MR32 • MC68HC908MR16 Data Sheet, Rev. 6.1
SCR2:SCR1:SCR0
Table 13-6. SCI Baud Rate Selection
=
000
001
010
011
100
101
110
111
----------------------------------- -
64
×
f OP
PD BD
×
OP
of 4.9152 MHz.
Baud Rate Divisor (BD)
128
16
32
64
1
2
4
8
Table
13-6. Reset clears
Freescale Semiconductor