參數(shù)資料
型號: M30220MA-XXXRP
元件分類: 微控制器/微處理器
英文描述: 16-BIT, MROM, 10 MHz, MICROCONTROLLER, PQFP144
封裝: 16 X 16 MM, 0.40 MM PITCH, PLASTIC, TQFP-144
文件頁數(shù): 79/161頁
文件大?。?/td> 0K
代理商: M30220MA-XXXRP
Mitsubishi microcomputers
M30220 Group
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Clock Output
24
Clock Output
The clock output function select bit allows you to choose the clock from f1, fC1, or a divide-by-n clock that is
output from the P57/CKOUT pin. The clock divide counter is an 8-bit counter whose count source is f32, and
its divide ratio can be set in the range of 0016 to FF16. Also, the clock divided counter can be controlled for
start or stop by the clock divide counter start flag. Figure 1.9.5 shows a block diagram of clock output.
Figure 1.9.6 shows a clock divided counter related register.
Figure 1.9.5. Block diagram of clock output
Figure 1.9.6. Clock divided counter related register
Clock source
selection
Reload register (8)
Low-order 8 bits
Data bus low-order bits
P57
f1
fC1
1/2
Division n+1 n=0016 to FF16
Clock divided counter (8)
Example:
When f(XIN)=10MHz, count source = f32
n=0716 : approx. 19.5kHz
n=2616 : approx. 4.0kHz
n=4D16 : approx. 2.0kHz
n=9B16 : approx. 1.0kHz
P57/CKOUT
f32
Address 036E16
Clock divided counter
Symbol
Address
When reset
CDC
036E16
XX16
Function
Values that can be set
W
R
b7
b0
8-bit timer
0016 to FF16
Clock divided counter control register
Symbol
Address
When reset
CDCC
036016
0XXXXXXX2
Function
Bit symbol
W
R
b7
b6
b5
b4
b3
b2
b1
b0
CDCS
Bit name
Clock divided counter
start flg
0 : Stop
1 : Start
Nothing is assigned.
In an attempt to write to these bits, write “0”. The value, if read, turns out to be
indeterminate.
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