参数资料
型号: ST7PL38F2MC/XXXE
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, PDSO20
封装: 0.300 INCH, ROHS COMPLIANT, PLASTIC, SOP-20
文件页数: 48/168页
文件大小: 2955K
代理商: ST7PL38F2MC/XXXE
Obsolete
Product(s)
- Obsolete
Product(s)
ST7L34, ST7L35, ST7L38, ST7L39
141/168
ELECTRICAL CHARACTERISTICS (cont’d)
13.8 I/O PORT PIN CHARACTERISTICS
13.8.1 General Characteristics
Subject to general operating conditions for VDD, fOSC and TA (-40 to +125°C), 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 81). 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 81).
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 81. Two Typical Applications with Unused I/O Pin
l
Symbol
Parameter
Conditions
Min
Typ
Max
Unit
VIL
Input low level voltage
VSS - 0.3
0.3 x VDD
V
VIH
Input high level voltage
0.7 x VDD
VDD + 0.3
Vhys
Schmitt trigger voltage
hysteresis1)
400
mV
IL
Input leakage current
VSS VIN VDD
±1
A
IS
Static current consumption induced by
each floating input pin2)
Floating input mode
400
RPU
Weak pull-up equivalent resistor3)
VIN = VSS, VDD = 5V
50
100
170
k
CIO
I/O pin capacitance
5
pF
tf(IO)out
Output high to low level fall time1)
CL = 50pF
Between 10% and 90%
25
ns
tr(IO)out
Output low to high level rise time1)
tw(IT)in
External interrupt pulse time4)
1tCPU
10k
UNUSED I/O PORT
ST7
10k
UNUSED I/O PORT
ST7
VDD
Caution: During normal operation the ICCCLK pin must be pulled up, internally or externally (external pull-up of 10k mandatory in
noisy environment). This is to avoid entering ICC mode unexpectedly during a reset.
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.
n
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