參數(shù)資料
型號: MB90F523B
廠商: Fujitsu Limited
英文描述: Octal Transparent D-type Latches With 3-State Outputs 20-CFP -55 to 125
中文描述: 16位微控制器專有
文件頁數(shù): 73/99頁
文件大?。?/td> 978K
代理商: MB90F523B
MB90520A/520B Series
73
21. Clock Monitor Function
The clock monitor function outputs the machine clock divided by a specified amount to the clock monitor pin
(CKOT) .
Clock monitor functions
Output frequency of the clock monitor function
Block diagram
Function
Output frequency
Machine clock divided by 2 to 32 (8 settings available)
None
Not supported by the extended intelligent I/O service (EI
2
OS) .
Interrupts
EI
2
OS support
FRQ2 - 0
Bits
Machine Clock
Divide Ratio
When
φ
=
16 MHz
Period
When
φ
=
8 MHz
Period
When
φ
=
4 MHz
Period
Frequency
Frequency
Frequency
000
B
φ
/2
1
φ
/2
2
φ
/2
3
φ
/2
4
φ
/2
5
φ
/2
6
φ
/2
7
φ
/2
8
125 ns
8 MHz
250 ns
4 MHz
500 ns
1.0
μ
s
2.0
μ
s
4.0
μ
s
8.0
μ
s
16.0
μ
s
32.0
μ
s
64.0
μ
s
2 MHz
001
B
250 ns
4 MHz
500 ns
1.0
μ
s
2.0
μ
s
4.0
μ
s
8.0
μ
s
16.0
μ
s
32.0
μ
s
2 MHz
1 MHz
010
B
500 ns
1.0
μ
s
2.0
μ
s
4.0
μ
s
8.0
μ
s
16.0
μ
s
2 MHz
1 MHz
500 kHz
011
B
1 MHz
500 kHz
250 kHz
100
B
500 kHz
250 kHz
125 kHz
101
B
250 kHz
125 kHz
62.5 kHz
110
B
125 kHz
62.5 kHz
31.25 kHz
111
B
62.5 kHz
31.25 kHz
15.625 kHz
CKENFRQ2
CKOT
Pin
FRQ1 FRQ0
3
φ
I
Prescaler
Count
clock
selector
Output enable
Clock output enable
register (CLKR)
φ
: Undefined
: Machine clock frequency
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