ST72321J9 STMicroelectronics, ST72321J9 Datasheet - Page 156

• Manufacturer Part Number: ST72321J9
• Description: 8-BIT MCU WITH NESTED INTERRUPTS, FLASH,10-BIT ADC, FIVE TIMERS, SPI, SCI, I2C INTERFACE
• Manufacturer: STMicroelectronics

Specifications of ST72321J9

• 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
12.8 I/O PORT PIN CHARACTERISTICS
12.8.1 General Characteristics
Subject to general operating conditions for V
Figure 81. Unused I/Os configured as input
Notes:
1. Data based on characterization results, not tested in production.
2. Hysteresis voltage between Schmitt trigger switching levels. Based on characterization results, not tested.
3. When the current limitation is not possible, the V
tion. A positive injection is induced by V
on page 139
4. Configuration not recommended, all unused pins must be kept at a fixed voltage: using the output mode of the I/O for
example and leaving the I/O unconnected on the board or an external pull-up or pull-down resistor (see
peak current value taken at a fixed V
production. This value depends on V
5. The R
scribed in
6. To generate an external interrupt, a minimum pulse width has to be applied on an I/O port pin configured as an external
interrupt source.
156/193
ΣI
I
Symbol
INJ(PIN)
t
Note: I/O can be left unconnected if it is configured as output
(0 or 1) by the software. This has the advantage of
INJ(PIN)
t
greater EMC robustness and lower cost.
t
f(IO)out
r(IO)out
w(IT)in
V
R
C
V
V
I
I
hys
PU
L
S
IH
IO
IL
3)
PU
3)
Figure
pull-up equivalent resistor is based on a resistive transistor (corresponding I
Input low level voltage
Input high level voltage
Schmitt trigger voltage hysteresis
Injected Current on PC6 (Flash de-
vices only)
Injected Current on an I/O pin
Total injected current (sum of all I/O
and control pins)
Input leakage current
Static current consumption
Weak pull-up equivalent resistor
I/O pin capacitance
Output high to low level fall time
Output low to high level rise time
External interrupt pulse time
for more details.
82).
V
DD
Parameter
10kΩ
10kΩ
UNUSED I/O PORT
UNUSED I/O PORT
1)
1)
DD
IN
IN
value, based on design simulation and technology characteristics, not tested in
and temperature values.
>V
6)
ST7XXX
ST7XXX
DD
1)
5)
1)
2)
while a negative injection is induced by V
CMOS ports
V
V
Floating input mode
V
C
Between 10% and 90%
IN
DD
DD
SS
IN
L
=50pF
=
maximum must be respected, otherwise refer to I
≤
, f
=5V
V
V
OSC
SS
Conditions
IN
≤
, and T
V
Figure 82. Typical I
DD
V
DD
=5V
A
4)
unless otherwise specified.
90
80
70
60
50
40
30
20
10
0
2
0.7xV
2.5
Min
50
0
1
Ta=140°C
Ta=95°C
Ta=25°C
Ta=-45°C
3
DD
PU
3.5
IN
vs. V
PU
<V
V dd(V)
Typ
400
120
0.7
25
25
5
4
current characteristics de-
SS
DD
. Refer to
4.5
with V
0.3xV
5
Max
± 25
INJ(PIN)
250
Figure
± 4
+4
±1
5.5
section 12.2.2
DD
IN
=V
81). Static
specifica-
6
SS
Unit
t
mA
CPU
μA
kΩ
pF
ns
V