20-151-0178 Rabbit Semiconductor, 20-151-0178 Datasheet - Page 38

• Manufacturer Part Number: 20-151-0178
• Description: CABLE CONVERTER RS-232 TO USB
• Manufacturer: Rabbit Semiconductor

Specifications of 20-151-0178

• Accessory Type: USB to RS232 Adapter
• Product: Microcontroller Accessories
• For Use With/related Products: Rabbit-based Boards
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 20-151-0178; 316-1181

4.3.6.1 Keypad Inputs
The RabbitFLEX Configurator will automatically assign pins from connector J5 as the keypad inputs and
outputs. Keypad inputs and outputs are digital I/O circuits. Keypad inputs are read by the API function
flexKeyProcess(). This function must be called frequently in a software application in order to poll
the keypad for key presses. See sample program Samples/RabbitFLEX_BL300F/keypad.c for
an example of how to use the keypad API functions. (The “RabbitFLEX_BL300F” folder was formerly
named “RabbitFLEX_SBC40.”)
32
Note 1: (V
Note 2: at V
Note 3: at V
Note 4: Over Maximum Input Voltage range
Note 5: From PowerCore Supply5
Note 6: I
Note 7: Time delay from a cell pin input voltage change from 0 to 5 Volts to see V
Note 8: Time delay from a cell pin input voltage change from 5 to 0 Volts to see V
Symbol
V
V
V
V
I
I
V
I
I
QH
t
t
QL
I
Q
IH
IL
I1
I0
IW
IM
IH
IL
I
T
IH
= ((5 - V
IH
IL
+ V
IL
) / 2
IW
Working Input Voltage
Maximum Input Voltage
High Level Input Voltage
Low Level Input Voltage
Trigger Threshold Voltage
High Level Input Current
Low Level Input Current
Input Current
High Level Quiescent Current
Low Level Quiescent Current
Input Time Delay to 1
Input Time Delay to 0
) / 10) mA over Working Input Voltage Range
Parameter
Figure 4-9 Keypad Input Circuit Schematic
Table 4-5. Keypad Input Characteristics
W
W
www.rabbit.com
2, 5, 6
3, 5, 6
Note
DC
AC
1
2
4
7
8
3
Min
-0.5
2.0
-1
0
Typical
-0.42
0.42
-0.3
500
100
1.4
0.3
IH
IL
at the cell output
at the cell output
RabbitFLEX BL300F Options
Max
0.8
1.5
5
6
cell v6.01
v1.03
Unit
mA
mA
mA
mA
mA
nS
nS
V
V
V
V
V