A14 Secondary Keypad - Agilent Technologies 35670A Service Manual

COL0 - COL2
ROW0 - ROW5
PWRFW
Agilent 35670A

A14 Secondary Keypad

The following table lists signals routed between the A11 Keyboard Controller
assembly and the A14 Secondary Keypad assembly. This table shows several things
— if the assembly generates or uses the signal. A description of each signal follows
the table.
Signal Name
COL0
COL1
COL2
ROW0
ROW1
ROW2
ROW3
ROW4
ROW5
PWRFW
GND
S This assembly is the source of the signal.
• This assembly uses the signal.
Column 0 - Column 2 — A high-to-low transition on one column line indicates that a key in
that column was pressed. After the A11 Keyboard Controller assembly's microprocessor
determines the keypad row location and the key number, the microprocessor sets the column
lines low which forces SINTFPn low. A high-to-low transition on SINTFPn informs the
A7 CPU assembly that a key was pressed.
Row 0 - Row 5 — A low on one row line indicates that a key in that row was pressed.
Power Fail Warning — A high on this line turns on the power-on LED.
A11 Connection
P2 Pin 3
P2 Pin 2
P2 Pin 1
P3 Pin 3
P3 Pin 2
P3 Pin 1
P4 Pin 3
P4 Pin 2
P4 Pin 1
P5 Pin 3
P5 Pin 1
Voltages and Signals
A14 Secondary Keypad
A11 A14
•
•
•
•
•
•
•
•
•
S
•
S
S
S
S
S
S
S
S
S
•
•
9-23