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ST72C254G2 bảng dữ liệu(PDF) 104 Page - STMicroelectronics

tên linh kiện ST72C254G2
Giải thích chi tiết về linh kiện  8-BIT MCU WITH SINGLE VOLTAGE FLASH MEMORY, ADC, 16-BIT TIMERS, SPI, I2C INTERFACES
PDF  135 Pages
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nhà sản xuất  STMICROELECTRONICS [STMicroelectronics]
Trang chủ  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

ST72C254G2 bảng dữ liệu(HTML) 104 Page - STMicroelectronics

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ST72104G, ST72215G, ST72216G, ST72254G
104/135
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 63. 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
3
12
tCPU
fCPU=8MHz
250
375
1500
ns
tv(IT)
Interrupt reaction time 2)
tv(IT) = ∆tc(INST) +10
10
22
tCPU
fCPU=8MHz
1.25
2.75
µs
Symbol
Parameter
Condi tions
Min
Typ
Max
Unit
VOSC1H
OSC1 input pin high level voltage
see Figure 63
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
µA
OSC1
OSC2
fOSC
EXTERNAL
ST72XXX
CLOCK SOURCE
Not connected internally
VOSC1L
VOSC1H
tr(OSC1)
tf(OSC1)
tw(OSC1H)
tw(OSC1L)
IL
90%
10%



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