參數(shù)資料
型號: ST72F652R4T1
廠商: STMICROELECTRONICS
元件分類: 微控制器/微處理器
英文描述: 8-BIT, FLASH, 8 MHz, MICROCONTROLLER, PQFP64
封裝: 14 X 14 MM, TQFP-64
文件頁數(shù): 38/160頁
文件大?。?/td> 974K
代理商: ST72F652R4T1
ST7265
132/160
13.5 CLOCK AND TIMING CHARACTERISTICS
Subject to general operating conditions for VDD,fOSC,and TA.
13.5.1 General Timings
13.5.2 External Clock Source
Figure 75. Typical Application with an External Clock Source
Notes:
1. Data based on typical application software.
2. Time measured between interrupt event and interrupt vector fetch.
t
c(INST) is the number of tCPU cycles needed to finish
the current instruction execution.
3. Data based on design simulation and/or technology characteristics, not tested in production.
Symbol
Parameter
Conditi ons
Min
Typ 1)
Max
Unit
tc(INST)
Instruction cycle time
2
4
12
tCPU
fCPU=8MHz
250
500
1500
ns
tv(IT)
Interrupt reaction time 2)
tv(IT) = tc(INST) +10
10
22
tCPU
fCPU=8MHz
1.25
2.75
s
Symbol
Parameter
Condi tions
Min
Typ
Max
Unit
VOSC1H
OSC1 input pin high level voltage
0.7xVDD
VDD
V
VOSC1L
OSC1 input pin low level voltage
VSS
0.3xVDD
tw(OSC1H)
tw(OSC1L)
OSC1 high or low time 3)
15
ns
tr(OSC1)
tf(OSC1)
OSC1 rise or fall time 3)
15
IL
OSCx Input leakage current
VSS≤VIN≤VDD
±1
A
OSC1
OSC2
fOSC
EXTE RNAL
ST72XXX
CLOCK SOURCE
Not connected internally
VOSC1L
VOSC1H
tr(OSC1)
tf(OSC1)
tw(OSC1H)
tw(OSC1L)
IL
90%
10%
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