参数资料
型号: ST7FLIT19BF1B3
厂商: STMICROELECTRONICS
元件分类: 微控制器/微处理器
英文描述: 8-BIT, FLASH, 8 MHz, MICROCONTROLLER, PDIP20
封装: 0.300 INCH, ROHS COMPLIANT, PLASTIC, DIP-20
文件页数: 28/157页
文件大小: 2983K
代理商: ST7FLIT19BF1B3
ST7LITE1xB
123/157
13.5 CLOCK AND TIMING CHARACTERISTICS
Subject to general operating conditions for VDD, fOSC, and TA.
13.5.1 General Timings
Notes:
1. Guaranteed by Design. Not tested in production.
2. Data based on typical application software.
3. Time measured between interrupt event and interrupt vector fetch.
t
c(INST) is the number of tCPU cycles needed to fin-
ish the current instruction execution.
4. Data based on design simulation and/or technology characteristics, not tested in production.
13.5.2 External Clock Source
Figure 78. Typical Application with an External Clock Source
13.5.3 Auto Wakeup from Halt Oscillator (AWU)
Note: 1. Guaranteed by Design. Not tested in production.
Symbol
Parameter 1)
Conditions
Min
Typ 2)
Max
Unit
tc(INST)
Instruction cycle time
fCPU=8MHz
23
12
tCPU
250
375
1500
ns
tv(IT)
Interrupt reaction time 3)
tv(IT) = tc(INST) + 10
fCPU=8MHz
10
22
tCPU
1.25
2.75
s
Symbol
Parameter
Conditions
Min
Typ
Max
Unit
VOSC1H or VCLKIN_H OSC1/CLKIN input pin high level voltage
0.7xVDD
VDD
V
VOSC1L or VCLKIN_L
OSC1/CLKIN input pin low level voltage
VSS
0.3xVDD
tw(OSC1H) or tw(CLKINH)
tw(OSC1L) or tw(CLKINL)
OSC1/CLKIN high or low time 4)
15
ns
tr(OSC1) or tr(CLKIN)
tf(OSC1) or tf(CLKIN)
OSC1/CLKIN rise or fall time 4)
15
IL
OSCx/CLKIN Input leakage current
VSS≤VIN≤VDD
±1
A
OSC1/CLKIN
OSC2
fOSC
EXTERNAL
ST72XXX
CLOCK SOURCE
Not connected internally
VOSC1L or VCLKINL
VOSC1H or VCLKINH
tr(OSC1 or CLKIN))
tf(OSC1 or CLKIN)
tw(OSC1H or CLKINH))
tw(OSC1L or CLKINL)
IL
90%
10%
Symbol
Parameter 1)
Conditions
Min
Typ
Max
Unit
fAWU
AWU Oscillator Frequency
50
125
250
kHz
tRCSRT
AWU Oscillator startup time
50
s
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