Fluke 78 - Page 59

Schematic Diagrams
5
5-3
Table 5-1. Signal Abbreviations
Number Name Description
1 REFI REFerence Input
2 AGND Analog GrouND
3 REFH REFerence High
4 VDD plus power supply
5 PS2 Power Supply 2
6 PSI Power Supply 1
7 PS0 Power Supply 0
8 BIAS BIAS input
9 DO Digital Output
10 P21 Port 2, bit 1
11 DTS Diode Test Source
12 OSCI OSCillator Input
13 OSCO OSCillator Output
14 DGND Digital GrouND
15 BPR BeePeR drive
16 AZEN Auto Zero ENd signal
17 P31 Port 3, bit 1
18 P32 Port 3, bit 2
19 P33 Port 3, bit 3
20 S0 Icd Segment 0
21 S1 icd Segment 1
22 S2 Icd Segment 2
23 S3 Icd Segment 3
24 S4 Icd Segment 4
25 S5 Icd Segment 5
26 S6 Icd Segment 6
27 S7 Icd Segment 7
28 S8 Icd Segment 8
29 S9 Icd Segment 9
30 S10 Icd Segment 10
31 S11 Icd Segment 11
32 S12 Icd Segment 12
33 S13 Icd Segment 13
34 S14 Icd Segment 14
35 S15 Icd Segment 15
36 S16 Icd Segment 16
37 S17 Icd Segment 17
38 S18 Icd Segment 18
39 S19 Icd Segment 19
40 VSS minus power supply
41 S20 Icd Segment 20
42 S21 Icd Segment 21
43 S22 Icd Segment 22
44 S23 Icd Segment 23
45 S24 Icd Segment 24
46 S25 Icd Segment 25
47 S26 Icd Segment 26
48 S27 Icd Segment 27
49 S28 Icd Segment 28
50 VOA Icd drive VOltage A
51 VOB Icd drive VOltage B
52 S29 Icd Segnment 29
53
54
S30
S31
Icd Segment 30
lcd Segment 31
55 RES* RESet, active low