參數(shù)資料
型號: DMC73C168
英文描述: 8Bit Single Chip Microcontroller
中文描述: 8位單芯片微控制器
文件頁數(shù): 11/90頁
文件大小: 742K
代理商: DMC73C168
11
8Bit Single Chip Microcontroller
DMC73C167
3.4 AC Characteristics
I/O Port
Parameter
Port
Conditions
CL=50pF
Min
Typ
Max
1
Unit
us
I/O Port output
rise time
SCL SDA B0-B7
PWM1_n*
Except SCL, SDA,
B0-B7, PWM1_n
SCL SDA B0-B7
PWM1_n*
Except SCL, SDA,
B0-B7, PWM1_n
CL=15pF
CL=50pF
CL=50pF
30
60
150
1
ns
I/O Port output
fall time
us
CL=15pF
CL=50pF
10
40
70
ns
* External pull-up registers are needed in PWM1_n, B0-B3.
External pull-up registers are also needed in SCL, SDA. The values would be recommendable
to fit rise and falling time of I2C spec.
Clock I/O
Parameter
Rise time
Symbol
tr(c)
Min
Typ
Max
20
Unit
ns
Clock pulse
Fall time
tf(c)
10
ns
Duty cycle
dty(c)
45
50
55
%
Note : Timing points are 90%(high) and 10%(low).
- Externally Driven Clock Input Waveform -
££á££×££
X
Y
DUTY(%) =
Tc(c) = X + Y
Tc(c)
X or Y
x 100
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