ST7263B datasheet(109/132 Pages) STMICROELECTRONICS

109 / 132 page

ST7263B

109/132

13.8 I/O PORT PIN CHARACTERISTICS

13.8.1 General Characteristics

Subject to general operating conditions for VDD, fCPU, and TA unless otherwise specified.

Figure 61. Two typical Applications with unused I/O Pin

Figure 62. Typical IPU vs. VDD with VIN=VSS

Figure 63. 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 61). 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 62). 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

0.3xVDD

VIH

Input high level voltage

0.7xVDD

VIN

Input voltage

True open drain I/O pins

VSS

6.0

Other I/O pins

VDD

Vhys

Schmitt trigger voltage hysteresis

400

Input leakage current

VSS≤VIN≤VDD

±1

µA

Static current consumption 2)

Floating input mode

200

RPU

Weak pull-up equivalent resistor 3)

VIN=VSS

VDD=5V

120

Ω

CIO

I/O pin capacitance

tf(IO)out

Output high to low level fall time

CL=50pF

Between 10% and 90%

tr(IO)out

Output low to high level rise time

tw(IT)in

External interrupt pulse time 4)

1tCPU

10k

Ω

UNUSED I/O PORT

ST72XXX

10k

Ω

UNUSED I/O PORT

ST72XXX

VDD

100

Vdd (V)

-45°C

25°C

75°C

100

110

120

130

140

150

160

170

Vdd (V)

-45°C

25°C

75°C

ST7263B 数据表(PDF) 109 Page - STMicroelectronics

ST7263B 数据表(HTML) 109 Page - STMicroelectronics

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

数据表下载