ST72321AR6 STMicroelectronics, ST72321AR6 Datasheet - Page 146

• Manufacturer Part Number: ST72321AR6
• Description: 8-BIT MCU WITH NESTED INTERRUPTS, FLASH,10-BIT ADC, FIVE TIMERS, SPI, SCI, I2C INTERFACE
• Manufacturer: STMicroelectronics

Specifications of ST72321AR6

• Hdflash Endurance: 100 cycles, data retention
• Clock Sources: crystal/ceramic resonator oscillators, internal RC oscillator, clock security system and bypass for external clock
• Four Power Saving Modes: Halt, Active-Halt,Wait and Slow
• Main Clock Controller With: Real time base, Beep and Clock-out capabilities
• Two 16-bit Timers With: 2 input captures, 2 output compares, external clock input on one timer, PWM and pulse generator modes
• 8-bit Pwm Auto-reload Timer With: 2 input captures, 4 PWM outputs, output compare and time base interrupt, external clock with event detector

ST72321Rx ST72321ARx ST72321Jx
12.5 CLOCK AND TIMING CHARACTERISTICS
Subject to general operating conditions for V
12.5.1 General Timings
12.5.2 External Clock Source
Figure 76. 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. Δt
the current instruction execution.
3. Data based on design simulation and/or technology characteristics, not tested in production.
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t
t
Symbol
Symbol
w(OSC1H)
V
w(OSC1L)
V
t
t
t
r(OSC1)
f(OSC1)
c(INST)
OSC1H
OSC1L
t
v(IT)
I
L
V
V
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
OSC1 Input leakage current
OSC1H
OSC1L
v(IT)
EXTERNAL
CLOCK SOURCE
= Δt
c(INST)
Parameter
Parameter
+ 10
t
r(OSC1)
3)
2)
3)
t
f(OSC1)
OSC2
OSC1
90%
f
f
see
V
DD
CPU
CPU
SS
10%
, f
Figure 76
=8MHz
=8MHz
≤ V
CPU
Conditions
IN
Conditions
≤ V
, and T
DD
t
Not connected internally
w(OSC1H)
A
.
c(INST)
I
is the number of t
L
t
0.7xV
w(OSC1L)
1.25
Min
250
10
2
Min
V
5
SS
f
DD
OSC
Typ
ST72XXX
375
Typ
3
CPU
1)
cycles needed to finish
0.3xV
1500
Max
2.75
Max
12
22
V
15
±1
DD
DD
Unit
Unit
t
t
CPU
ns
CPU
μs
μA
ns
V