A11 Keyboard Controller - Agilent Technologies 35670A Service Manual

BBEEPER
HRNGA
HRNGB
HRNGC
HRNGD
RESET
Voltages and Signals

A11 Keyboard Controller

A11 Keyboard Controller
The following table lists signals routed between the A11 Keyboard Controller
assembly and the A7 CPU assembly. This table shows several things — if the
assembly generates or uses the signal or voltage, and if a signal is bidirectional. A
description of each signal follows the table.
Signal Name
BBEEPER
HRNGA
HRNGB
HRNGC
HRNGD
RESET
SCL
SDA
SINTFPn
+5 V
Gnd
Not Used
S This assembly is the source of the signal.
• This assembly uses the signal.
⇔ This signal is bidirectional.
— This assembly does not use this signal.
Buffered Beeper — This line controls the frequency of the front panel beeper tone.
Half Range A — In both the two channel and four channel analyzer, a high on this line turns on
the channel 1 half range LED. This line goes high when the A1 or A2 Input assembly detects
that the amplitude of the channel 1 input signal reached half the set range.
Half Range B — In a two channel analyzer, a high on this line turns on the channel 2 half range
LED. In a four channel analyzer, a high on this line turns on the channel 3 half range LED.
This line goes high when the A1 Input assembly detects that the amplitude of the channel 2
input signal reached half the set range or when the A2 Input assembly detects that the
amplitude of the channel 3 input signal reached half the set range.
Half Range C — In a four channel analyzer, a high on this line turns on the channel 2 half
range LED. This line goes high when the A2 Input assembly detects that the amplitude of the
channel 2 input signal reached half the set range. This line is only used in four channel
analyzers.
Half Range D — In a four channel analyzer, a high on this line turns on the channel 4 half
range LED. This line goes high when the A2 Input assembly detects that the amplitude of the
channel 4 input signal reached half the set range. This line is only used in four channel
analyzers.
System Reset — A high on this line resets the digital logic on the A11 Keyboard Controller
assembly. This line pulses high during power-up and power-down, and when the A7 CPU
assembly's microprocessor executes the RESET instruction or is externally reset.
9-18
Pin(s)
3
11
9
2
1
5
15
13
7
10
6, 8, 12, 14, 16
4
Agilent 35670A
A7 P1
S
—
—
—
—
S
S
⇔
•
•
•
—
A11
•
•
•
•
•
•
•
⇔
S
•
•
—