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参数资料
型号： ST7FLITE19BF0B6
厂商： STMICROELECTRONICS
元件分类： 微控制器/微处理器
英文描述： 8-BIT, FLASH, 8 MHz, MICROCONTROLLER, PDIP20
封装： 0.300 INCH, ROHS COMPLIANT, PLASTIC, DIP-20
文件页数： 34/159页
文件大小： 2855K
代理商： ST7FLITE19BF0B6
ST7LITE1xB
129/159
13.8 I/O PORT PIN CHARACTERISTICS
13.8.1 General Characteristics
Subject to general operating conditions for VDD, fOSC, and TA unless otherwise specified.
Notes:
1. Data based on validation/design results.
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 80). 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.
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.
Figure 80. Two typical Applications with unused I/O Pin
Symbol
Parameter
Conditions
Min
Typ
Max
Unit
VIL
Input low level voltage
VSS - 0.3
0.3xVDD
V
VIH
Input high level voltage
0.7xVDD
VDD + 0.3
Vhys
Schmitt trigger voltage
hysteresis 1)
400
mV
IL
Input leakage current
VSS≤VIN≤VDD
±1
μA
IS
Static current consumption in-
duced by each floating input
pin2)
Floating input mode
400
RPU
Weak pull-up equivalent
resistor3)
VIN=VSS
VDD=5V
50
120
250
k
Ω
VDD=3V
160
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
Ω
UNUSED I/O PORT
ST7XXX
10k
Ω
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.
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相关代理商/技术参数
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