参数资料
型号: ST72622L2T1
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, PQFP44
封装: TQFP-44
文件页数: 16/134页
文件大小: 815K
代理商: ST72622L2T1
ST7262
112/134
12.8 I/O PORT PIN CHARACTERISTICS
12.8.1 General Characteristics
Subject to general operating conditions for VDD,fCPU, and TA unless otherwise specified.
Figure 64. Two typical Applications with unused I/O Pin
Figure 65. Typical IPU vs. VDD with VIN=VSS
Figure 66. Typical RPU vs. VDD with VIN=VSS
Notes:
1. Unless otherwise specified, typical data are based on TA=25°C and VDD=5V, 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 64). Data based on design simulation and/or technology
characteristics, not tested in production.
3. The RPU pull-up equivalent resistor is based on a resistive transistor (corresponding IPU current characteristics de-
scribed in Figure 65). This data is based on characterization results.
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.
Symbol
Parameter
Conditions
Min
Typ 1)
Max
Unit
VIL
Input low level voltage
0.3xV
DD
V
VIH
Input high level voltage
0.7xV
DD
VIN
Input voltage
True Open Drain I/O pins
VSS
6.0
V
Other I/O pins
VDD
Vhys
Schmitt trigger voltage hysteresis
400
mV
IL
Input leakage current
VSSVINVDD
±1
A
IS
Static current consumption 2)
Floating input mode
200
RPU
Weak pull-up equivalent resistor 3)
VIN=VSS
VDD=5V
50
80
120
k
CIO
I/O pin capacitance
5
pF
tf(IO)out
Output high to low level fall time
CL=50pF
Between 10% and 90%
25
ns
tr(IO)out
Output low to high level rise time
25
tw(IT)in
External interrupt pulse time 4)
1tCPU
10k
UNUSED I/O PORT
ST72XXX
10k
UNUSED I/O PORT
ST72XXX
VDD
Ipu (
A)
VDD (V)
TOBE CHARACTERIZED
R(
)
VDD (V)
TOBE CHARACTERIZED
1
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