Intel 8XC196MC User Manual page 500

FREQ_GEN
(8XC196MD)
The frequency (FREQ_GEN) register holds a programmed value that specifies the output frequency.
This value is reloaded into the down-counter each time the counter reaches 0.
7
8XC196MD
Bit
Number
7:0 Output Frequency
Use the following formula to calculate the FREQ value for the desired output frequency
and write this value to the frequency register.
-------------------------------------------- -
FREQ
=
16
where:
FREQ
F
XTAL1
FREQ_OUT
Output Frequency
F
XTAL1
1
–
×
FREQ_OUT
= 8-bit value to load into FREQ_GEN register
= input frequency on XTAL1 pin, in MHz
= output frequency on FREQOUT pin, in MHz
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Reset State:
Function
REGISTERS
FREQ_GEN
Address: 1FB8H
00H
0
C-23