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ST6215C Datasheet(PDF) 73 Page - STMicroelectronics

Part No. ST6215C
Description  8-BIT MCUs WITH A/D CONVERTER, TWO TIMERS, OSCILLATOR SAFEGUARD & SAFE RESET
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Maker  STMICROELECTRONICS [STMicroelectronics]
Homepage  http://www.st.com
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ST6215C Datasheet(HTML) 73 Page - STMicroelectronics

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ST6215C/ST6225C
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11.5 CLOCK AND TIMING CHARACTERISTICS
Subject to general operating conditions for VDD, fOSC, and TA.
11.5.1 General Timings
11.5.2 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.
Figure 49. Typical Application with an External Clock Source
Symbol
Parameter
Conditions
Min
Typ 1)
Max
Unit
tc(INST)
Instruction cycle time
24
5
tCPU
fCPU=8 MHz
3.25
6.5
8.125
µs
tv(IT)
Interrupt reaction time 2)
tv(IT) = ∆tc(INST) + 6
611
tCPU
fCPU=8 MHz
9.75
17.875
µs
Symbol
Parameter
Conditions
Min
Typ
Max
Unit
VOSCINH
OSCIN input pin high level voltage
See Figure 49
0.7xVDD
VDD
V
VOSCINL
OSCIN input pin low level voltage
VSS
0.3xVDD
IL
OSCx Input leakage current
VSS≤VIN≤VDD
± 2
µA
OSCIN
OSCOUT
fOSC
EXTERNAL
ST62XX
CLOCK SOURCE
VOSCINL
VOSCINH
IL
90%
10%
Not connected
1


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