ST72C334J4TAE STMicroelectronics, ST72C334J4TAE Datasheet - Page 117

• Manufacturer Part Number: ST72C334J4TAE
• Description: 8-bit MCU for automotive with single voltage Flash/ROM memory, ADC, 16-bit timers, SPI, SCI interfaces
• Manufacturer: STMicroelectronics

15.5 CLOCK AND TIMING CHARACTERISTICS
Subject to general operating conditions for V
15.5.1 General Timings
15.5.2 External Clock Source
Figure 66. 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
finish the current instruction execution.
3. Data based on design simulation and/or technology characteristics, not tested in production.
t
t
Symbol
Symbol
w(OSC1H)
V
w(OSC1L)
V
V
V
t
t
t
r(OSC1)
f(OSC1)
c(INST)
OSC1H
OSC1L
OSC1H
OSC1L
t
v(IT)
I
L
EXTERNAL
CLOCK SOURCE
Instruction cycle time
Interrupt reaction time
t
OSC1 input pin high level voltage
OSC1 input pin low level voltage
OSC1 high or low time
OSC1 rise or fall time
OSCx Input leakage current
v(IT)
= ∆t
t
c(INST)
r(OSC1)
Parameter
Parameter
+ 10
3)
2)
3)
t
f(OSC1)
OSC2
OSC1
90%
ST72334xx-Auto, ST72314xx-Auto, ST72124Jx-Auto
10%
f
f
see
V
DD
CPU
CPU
SS
, f
≤V
Figure 66
=8MHz
=8MHz
OSC
IN
Conditions
Conditions
≤V
, and T
DD
t
Not connected internally
w(OSC1H)
A
.
c(INST)
I
L
t
is the number of t
w(OSC1L)
0.7xV
1.25
Min
250
10
2
Min
V
15
SS
DD
f
OSC
Typ
375
ST72XXX
Typ
3
1)
CPU
0.3xV
1500
Max
2.75
Max
cycles needed to
12
22
V
15
±1
DD
DD
117/150
Unit
Unit
t
t
CPU
CPU
ns
µs
µA
ns
V