User`s manual

OP710034
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 Hardware
Keypad Interface
The OP7100 has a touchscreen, which is connected to the circuit board at
header J5. Header J6 is available for a customer-supplied keypad for the
OP7110.
Table 3-1 lists the pinouts for headers J5 and J6. The pinout for header J5
is identical to the pinout for header J6.
Figure 3-10 shows the location of headers J5 and J6.
Figure 3-10. OP7100 Headers J5 and J6 (Keypad Interface)
Figure 3-11 shows a simplified diagram of the keypad interface.
Figure 3-11. Block Diagram of OP7100 Keypad Interface
Table 3-1. OP7100 Keypad Header Pinout
Signal Header J5/J6 Pin Signal Header J5/J6 Pin
ROW0 1 COL0 9
ROW1 2 COL1 10
ROW2 3 COL2 11
ROW3 4 COL3 12
ROW4 5 COL4 13
ROW5 6 COL5 14
ROW6 7 COL6 15
ROW7 8 COL7 16
J6
J5
U10
VCC
Q[07]
ROW[07]
A[07]Y[07]
74HC244
D[07]
/COLUMN
Keypad sense
8
8
8
To J5 (or to J6) keypad
connectors
COL[07]
U8, U9
Keypad/Buzzer drive
C14C21
1 nF
RN1
47 kΩ