参数资料
型号: 151-0153
厂商: Rabbit Semiconductor
文件页数: 45/162页
文件大小: 0K
描述: ASSEMBLY - RABBITFLEX CABLES
标准包装: 1
系列: RabbitFLEX™
附件类型: 缆线组件
适用于相关产品: BL300F
4.3.10.4 Contact Input
This section presents the circuit schematic and the characteristics for the contact input.
A contact input is designed to be connected to a switch. It has a longer time constant than the other digital
inputs to quiet the noise generated by a switch closure. And it already has the pullup allowing simple wir-
ing of the switch between the input and ground. Basically, it is a hardware switch debouncer, though it may
be still be neccesary to use software to fully debounce the switch.
Figure 4-14 Contact Input Circuit
+5 V
R4A
470 W
I/O
Pin
R5
4.7 k W
Digital Interface
Cell
C1
100 nF
VERSION 6.01
DIGITAL INPUT, CONTACTS
Table 4-11. Contact Input Characteristics
Symbol
Parameter
Note
Min
Typical
Max
Unit
DC
V IW
V IM
Working Input Voltage
Maximum Input Voltage
0
-0.5
5
10.5
V
V
V IH
V IL
High Level Input Voltage
Low Level Input Voltage
2.0
0.8
V
V
V T
I IH
I IL
Trigger Threshold Voltage
High Level Input Current
Low Level Input Current
1
2
3
1.4
-6.4
-8.9
V
mA
mA
I I
I QH
I QL
Input Current
High Level Quiescent Current
Low Level Quiescent Current
4
2, 5, 6
3, 5, 6
-13
6.4
8.9
13
mA
mA
mA
AC
t I1
t I0
Input Time Delay to 1
Input Time Delay to 0
7
8
240
780
uS
uS
Note 1: (V IH + V IL ) / 2
Note 2: at V IH
Note 3: at V IL
Note 4: Over Maximum Input Voltage range
Note 5: From PowerCore Supply5
Note 6: I Q = ((5 - V IW ) * 2.13) mA over Working Input Voltage Range
Note 7: Time delay from contact opening to see V IH at the cell output
Note 8: Time delay from contact closing to see V IL at the cell output
v1.03
cell v6.01
RabbitFLEX User’s Manual
39
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