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| 型号： | ST7PLITEUS5M6TR |
| 厂商： | STMICROELECTRONICS |
| 元件分类： | 微控制器/微处理器 |
| 英文描述： | 8-BIT, MROM, 8 MHz, MICROCONTROLLER, PDSO8 |
| 封装： | 0.150 INCH, LEAD FREE, PLASTIC, SOP-8 |
| 文件页数： | 89/108页 |
| 文件大小： | 1957K |
| 代理商： | ST7PLITEUS5M6TR |
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12.8 I/O PORT PIN CHARACTERISTICS
12.8.1 General Characteristics
Subject to general operating conditions for VDD,
fOSC, and TA unless otherwise specified.
Notes:
1. Data based on characterization results, not tested in production.
2. Configuration not recommended, all unused pins must be kept at a fixed voltage: using the output mode of the I/O for
example or an external pull-up or pull-down resistor (see Figure 51). Static peak current value taken at a fixed VIN value,
based on design simulation and technology characteristics, not tested in production. This value depends on VDD and tem-
perature values.
3. The RPU pull-up equivalent resistor is based on a resistive transistor (corresponding IPU current characteristics de-
scribed in Figure 48).
4. 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.
5. RPU not applicable on PA3 because it is multiplexed on RESET pin
Figure 47. Two typical Applications with unused I/O Pin
Symbol
Parameter
Conditions
Min
Typ
Max
Unit
VIL
Input low level voltage
-40°C to 125°C
0.3xVDD
V
VIH
Input high level voltage
0.7 x VDD
Vhys
Schmitt trigger voltage
hysteresis 1)
400
mV
IL
Input leakage current
VSS≤VIN≤VDD
±1
A
IS
Static current consumption in-
duced by each floating input
pin2)
Floating input mode
400
RPU
Weak pull-up equivalent
resistor 3) 5)
VIN=VSS
VDD=5V
80
120
170
k
VDD=3V
200 1)
CIO
I/O pin capacitance
5
pF
tf(IO)out
Output high to low level fall
time 1)
CL=50pF
Between 10% and 90%
25
ns
tr(IO)out
Output low to high level rise
time 1)
25
tw(IT)in
External interrupt pulse time 4)
1tCPU
10k
UNUSED I/O PORT
ST7XXX
10k
UNUSED I/O PORT
ST7XXX
VDD
Caution: During normal operation the ICCCLK pin must be pulled- up, internally or externally
(external pull-up of 10k mandatory in
This is to avoid entering ICC mode unexpectedly during a reset.
noisy environment).
Note: I/O can be left unconnected if it is configured as output (0 or 1) by the software. This has the advantage of greater EMC
robustness and lower cost.
1
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