Oscillation Clock Frequency And Serial Clock Input Frequency - Fujitsu F2MC-16LX Hardware Manual

CHAPTER 27 EXAMPLES OF MB90F474/MB90F476 SERIAL PROGRAMMING CONNECTION
27.2 Oscillation Clock Frequency and Serial Clock Input
Frequency
The serial clock frequencies that can be used for input to the MB90F474/MB90F476 can
be derived from the following formulas.
Change the serial clock input frequency corresponding to the oscillation clock
frequency used based on the settings of the flash microcomputer programmer.
I Oscillation clock frequency and serial clock input frequency
Calculate the serial clock frequency that can be input as follows:
Serial clock frequency to be input = 0.125 x oscillation clock frequency
Table 27.2-1 "Example of serial clock frequency calculation" shows a calculation example.
Table 27.2-1 Example of serial clock frequency calculation
Oscillation Maximum serial clock
clock frequency that can be
frequency input to microcomputer
4 MHz
8 MHz
16 MHz
496
frequency that can be set for
AF220/AF210/AF120/AF110
500kHz
1MHz
2MHz
Maximum serial clock
500kHz
850kHz
1.25MHz
Maximum serial clock
frequency that can be
set for AF200
500kHz
500kHz
500kHz