s908gz60cfa Freescale Semiconductor, Inc, s908gz60cfa Datasheet - Page 215

• Manufacturer Part Number: s908gz60cfa
• Description: M68hc08 Microcontrollers
• Manufacturer: Freescale Semiconductor, Inc

Use the following formula to calculate the ESCI baud rate:
where:
Table 14-11
Freescale Semiconductor
Frequency of the SCI clock source = f
BPD = Baud rate register prescaler divisor
BD = Baud rate divisor
PD = Prescaler divisor
PDFA = Prescaler divisor fine adjust
SCIBDSRC in the CONFIG2 register)
shows the ESCI baud rates that can be generated with a 4.9152-MHz bus frequency.
MC68HC908GZ60 • MC68HC908GZ48 • MC68HC908GZ32 Data Sheet, Rev. 6
Table 14-10. ESCI Prescaler Divisor Fine Adjust (Continued)
PSSB[4:3:2:1:0]
0 0 1 0 1
0 0 1 1 0
0 0 1 1 1
0 1 0 0 0
0 1 0 0 1
0 1 0 1 0
0 1 0 1 1
0 1 1 0 0
0 1 1 0 1
0 1 1 1 0
0 1 1 1 1
1 0 0 0 0
1 0 0 0 1
1 0 0 1 0
1 0 0 1 1
1 0 1 0 0
1 0 1 0 1
1 0 1 1 0
1 0 1 1 1
1 1 0 0 0
1 1 0 0 1
1 1 0 1 0
1 1 0 1 1
1 1 1 0 0
1 1 1 0 1
1 1 1 1 0
1 1 1 1 1
Baud rate =
Frequency of the SCI clock source
64 x BPD x BD x (PD + PDFA)
Bus
5/32 = 0.15625
6/32 = 0.1875
7/32 = 0.21875
8/32 = 0.25
9/32 = 0.28125
10/32 = 0.3125
11/32 = 0.34375
12/32 = 0.375
13/32 = 0.40625
14/32 = 0.4375
15/32 = 0.46875
16/32 = 0.5
17/32 = 0.53125
18/32 = 0.5625
19/32 = 0.59375
20/32 = 0.625
21/32 = 0.65625
22/32 = 0.6875
23/32 = 0.71875
24/32 = 0.75
25/32 = 0.78125
26/32 = 0.8125
27/32 = 0.84375
28/32 = 0.875
29/32 = 0.90625
30/32 = 0.9375
31/32 = 0.96875
or CGMXCLK (selected by
Prescaler Divisor Fine Adjust (PDFA)
I/O Registers
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