ST72F324BJ STMICROELECTRONICS [STMicroelectronics], ST72F324BJ Datasheet - Page 144

• Manufacturer Part Number: ST72F324BJ
• Description: 8-bit MCU, 3.8 to 5.5 V operating range with 8 to 32 Kbyte Flash/ROM, 10-bit ADC, 4 timers, SPI, SCI
• Manufacturer: STMICROELECTRONICS [STMicroelectronics]

Electrical characteristics
12.6
12.6.1
12.6.2
144/188
Clock and timing characteristics
Subject to general operating conditions for V
General timings
Table 92.
1. Data based on typical application software.
2. Time measured between interrupt event and interrupt vector fetch.
External clock source
Table 93.
1. Data based on design simulation and/or technology characteristics, not tested in production.
Figure 65. Typical application with an external clock source
Symbol
t
t
t
Symbol
w(OSC1H)
w(OSC1L)
V
V
t
t
c(INST)
r(OSC1)
f(OSC1)
t
OSC1H
OSC1L
v(IT)
needed to finish the current instruction execution.
I
lkg
Instruction cycle time
Interrupt reaction time t
V
V
OSC1 input pin high level voltage
OSC1 input pin low level voltage
OSC1 high or low time
OSC1 rise or fall time
OSC1 input leakage current
OSC1H
OSC1L
General timings
External clock source
External
clock source
t
r(OSC1)
Parameter
Parameter
(1)
v(IT)
(1)
t
f(OSC1)
= ∆t
OSC2
OSC1
90%
c(INST)
10%
+ 10
DD
, f
See
V
t
Not connected internally
(2)
w(OSC1H)
CPU
SS
Conditions
f
f
< V
Figure 65.
CPU
CPU
Conditions
, and T
IN
I
= 8 MHz
lkg
= 8 MHz
∆
< V
t
t
c(INST)
w(OSC1L)
A
DD
.
f
OSC
is the number of t
V
Min
V
ST72XXX
DD
1.25
Min
250
5
SS
10
2
-1
Typ
Typ
375
3
(1)
CPU
V
1500
Max
2.75
Max
V
12
22
ST72324B
SS
±1
15
cycles
DD
+1
t
t
Unit
Unit
CPU
CPU
ns
µs
µA
ns
V