Board Connector Pin Assignment - Agilent Technologies 4284A Service Manual

4-4. BOARD CONNECTOR PIN ASSIGNMENT

The pin assignments for each board are provided with the component locations using the
names listed in Table 4-1.
Table 4-1. Signal Name Used for Pin Assignments
Name
AD C L K
A 11-6 A20
/ACSO to /ACS7
A N A I to ANA6
AN DO to A N D7
/ A NLDS
A N R / W
/ A S
A l to A20
/ B I A S
/ C A R D _ L D S
/CA R D R / W
DO to D15
/ D TA C
/ E 0 C _ I N T
/ H A L T
/ H A N D L E R
/ H D L T R G I N T
/IDO fo—//D7
/ I N T F R M S T D I F
/ I N T T O STD___IF
K B D - I N T
/ K E Y DSP C T L
K EY L O C K I N T
/ L D S
/ L G N D
LOC 0
LOC 9 0
/ M E M C A R D
N U L L _ O U T
/POW F A I L
/REAR T R G I N T
/ R E S E T
R / W
/ S T D I F
/SCANNER
/SCA N N E R I N T
/U DS
/ V M A
/ V PA
8F
+12f/1:AN
-12VTAN
+5V M E M C A R D
Description
Clock signal for A-D converter
Address bus lines
Analog board (card) select signal
Address bus lines for the analog boards
Data bus line for controlling the analog boards
Analog Board Data Strobe Signal
Data Read/Write Signal
Address strobe signal
Address bus line
Bias current I/F access signal
Memory card lower data strobe
Memory card read/write signal
Data Bus Line for the digital boards
Data acknowledge signal
Interrupt signal for A-D End Of Conversion
Test Frequency Signal
Halt signal
Handler interface access signal
Trigger interrupt signal from Handler Interface
Board identification signal
Interrupt from the HP-IB interface
Interrupt to the HP-IB interface
Interrupt from the keyboard
Keyboard and display control signal
Keylock interrupt signal from Handler Interface
Lower data strobe
Logic circuits ground line
Local (0°) signal
Local (90°) signal
Memory card access signal
Null detector output signal
/ A LA RM signal to the handler interface
Trigger interrupt signal from the external trigger connector
on the rear panel
Reset signal
Read/Write signal
HP-IB access signal
Scanner interface access signal
Interrupt signal from the scanner interface
Upper data strobe
Valid memory access signal for CPU
Valid peripheral signal
8 x F ( test frequency) signal
+12 V for the cooling fan
-12 V for the cooling fan
+5 V for the memory card
4-2