Fujitsu MB90480 Series Hardware Manual page 442

CHAPTER 19 UART
[bit11, bit10, bit9, bit8] DIV3, DIV2, DIV1, DIV0
These bits are determines the division ratios of the machine clocks.
Notes:
• When changing the clock division ratio, wait for time of 2 division as a clock stabilization time
before the communication is performed.
• Please do not use the following settings when the dedicated baud rate generator is used at the
synchronous transmission.
1) CS2 to CS0 = 000
2) CS2 to CS0 = 001
420
DIV3 to DIV0
0000
B
0001
B
0010
B
0011
B
0100
B
0101
B
0110
B
0111
B
B
, DIV3 to DIV0 = 0000
B
Division Ratio
Division by 1
Division by 2
Division by 3
Division by 4
Division by 5
Division by 6
Division by 7
Division by 8
B