Fluke PM6685 - Page 67

Control Logic, PCB 1, sheet 1(5)
Drawings & Diagrams 8-5
AR7
AR6
AR5
AR4
AR3
AR2
AR1
AR0
AR1
AR2
AR0 AR1 AR3 AR5 AR6 AR7
AD7 AD6 AD5 AD4 AD3 AD2 AD1 AD0
AR2 AR4
AD0
AD1
AD2
AD3
AD4
AD5
AD6
AD7
AD8
AD9
AD10
AD11
AD12
AD13
AD0
AD1
AD2
AD3
AD4
AD5
AD6
AD7
A0
A1
A2
A3
A4
A5
A6
A7
ALE
A[0-15]
INST
A13
A9
A10
A11
A13
WAITSTATE
A8
A9
A10
A11
A12
A13
A14
AD7
AD0
AD1
AD2
AD3
AD4
AD5
AD6
A0
A1
A2
A3
A4
A5
A6
A7
RD
WRL
CSKEYBOARD
CSKEYBOARDIN
AR[0 -7]
AD13
AD12
AD11
AD10
AD9
AD8
AR6
AR5
AR4
AR3
AR2
AR1
AR0
AR7
AD[0-15]
CSKEYBO
ARDOUT
6MHz
CSROM
CSRAM
AD13
AD12
AD11
AD10
AD9
AD8 A8
A9
A10
A11
A12
A13
A14
A15
AD0
AD1
AD2
AD3
AD4
AD5
AD6
AD7
A0
A1
A2
A3
A4
A5
A6
A7
A8
A9
A10
A11
A12
A15
A14
AD14
AD15
RAM/ROM
AD14
A15
AD15
A14
AD15
AD14
BUSWIDTH
RD
A8
WRL
CSGPIB
AR3
AR0
AR[0-7]
+5V
+5V
+5V
+5V
+5V
+5V
+5V
+5V
+5V
+5V
+5V
+5V
+5V
+5V
+12V
-5.2V
+5V
+5CPU
+5CPU
+5V
+5V
-5.2V
+5V
U+12V
+5V
+5V
+12VREG/BATT
+5V
U+12V
+12VREG /BATT
+7V
+5V
+5V
+5CPU
-5.2V
+5V
+7V
+5V
U+12V
+12VREG /BATT
+7V
LO BATT
CSIA
CSASIC
DACMUX
CSRLY
CSDAC
A8
AR[0-7]
ALE
RD
WRL
DISABLE STANDBY
ENA-EXT-REF
CSIB
C
GET
12MHZ
AD[0-15]
BACKLIGHT
BURST
CARRY 1
CARRY 2
FIN
ON
STAND BY
-5.2V
TEST SIGNALS
TO GPIB
TO DISPLAY/
KEYBOARD
TO PRESCALER
STAND BY IND.
TEST
RESET
GATE IND.
EEPROM
R178
56
R173
10K
R185
56
U12B
24LC16B
GND
4
VCC
8
U20B
HC138
VCC
16
GND
8
U10
TL7705B
SENSE
7
RESIN
2
CT
3
GND
4
RESET
5
RESET
6
REF
1
VCC
8
R195
10K
J13
U12A
24LC16B
SDA
5
SCL
6
A0
1
A1
2
A2
3
WP
7
&
U26B
HC10
3
4
5
6
C92
15uF-6.3V
&
U26C
HC10
9
10
11
8
C95
100nF
U13A
HC574
OE
1
C1
11
Q0
19
Q1
18
Q2
17
Q3
16
Q4
15
Q5
14
Q6
13
Q7
12
D0
2
D1
3
D2
4
D3
5
D4
6
D5
7
D6
8
D7
9
U17B
HC573
VCC
20
GND
10
&
U19A
HC00
1
2
3
&
U18B
HC21
9
10
12
13
8
R166
100K
&
U26A
HC10
1
2
13
12
C99
10n
R200
10K
R162
100K
R174
330
R160
390
R191
56
J14
J19
TMH-108- 01-L-DW
1
2
3
4
5
6
7
8
9
10
13
12
11
14
15
16
B1
12MHz
R203
560
1
U24C
HC32
9
10
8
C85
22p
R186
56
R170
2.2K
R182
56
R205
56
1
U25A
HC32
1
2
3
CPU
ADR
DATA
U11
80C196KB
XTAL1
67
XTAL2
66
RESET
16
EA
2
NMI
3
AGND
12
VREF
13
VSS
14
VPP
37
READY
43
BUSWIDTH
64
ACH0/P0.0
6
ACH1/P0.1
5
ACH2/P0.2
7
ACH3/P0.3
4
ACH4/P0.4
11
ACH5/P0.5
10
ACH6/P0.6
8
ACH7/P0.7
9
P1.0
19
P1.1
20
P1.2
21
P1.3
22
P1.4
23
P1.5
30
P1.6
31
P1.7
32
TDX/P2.0
18
RDX/P2.1
17
EXTINT/P2.2
15
T2CLK/P2.3
44
T2RST/P2.4
42
PWM/P2.5
39
P2.6
33
P2.7
38
CLKOUT
65
WR/WRL
40
BHE/WRH
41
RD
61
ALE/ADV
62
INST
63
AD0/P3.0
60
AD1/P3.1
59
AD2/P3.2
58
AD3/P3.3
57
AD4/P3.4
56
AD5/P3.5
55
AD6/P3.6
54
AD7/P3.7
53
AD8/P4.0
52
AD9/P4.1
51
AD10/P4.2
50
AD11/P4.3
49
AD13/P4.5
47
AD14/P4.6
46
AD15/P4.7
45
AD12/P4.4
48
HSI.0
24
HSI.1
25
HSO.4/HSI.2
26
HSO.5/HSI.3
27
HSO.0
28
HSO.1
29
HSO.2
34
HSO.3
35
VSS
68
VCC
1
VSS
36
U22A
55257
CE
20
A10
21
OE
22
A11
23
A9
24
A8
25
A13
26
R/W
27
I/O1
11
I/O2
12
I/O3
13
I/O4
15
I/O5
16
I/O6
17
I/O7
18
I/O8
19
A14
1
A12
2
A0
10
A1
9
A2
8
A3
7
A4
6
A5
5
A6
4
A7
3
R167
100K
&
U18A
HC21
1
2
4
5
6
C89
100p
R179
10K
R190
56
R201
10K
R163
100K
C96
10n
R172
10K
R180
56
C101
100nF
C100
100nF
U24E
HC32
VCC
14
GND
7
&
U19B
HC00
4
5
6
C86
22p
R187
56
1
U15C
HC02
8
9
10
R175
10K
R176
56
C88
2.2uF-6.3V
R171
2.2K
R159
10K
HC573
U16A
D0
2
D5
7
Q0
19
D3
5
OE
1
Q5
14
Q3
16
Q6
13
D1
3
D6
8
D4
6
Q1
18
C1
11
Q4
15
Q2
17
D2
4
Q7
12
D7
9
U22B
55257
GND
14
VCC
28
R204
2.2K
J29
1
2
3
R183
56
U18C
HC21
VCC
14
GND
7
Q16
BC847B
R168
100K
C90
100p
J30
1
2
3
U14B
HC573
VCC
20
GND
10
HC573
U14A
D0
2
D5
7
Q0
19
D3
5
OE
1
Q5
14
Q3
16
Q6
13
D1
3
D6
8
D4
6
Q1
18
C1
11
Q4
15
Q2
17
D2
4
Q7
12
D7
9
L10
BLM21A102S
1
U15A
HC02
2
3
1
R164
100K
HC573
U17A
D0
2
D5
7
Q0
19
D3
5
OE
1
Q5
14
Q3
16
Q6
13
D1
3
D6
8
D4
6
Q1
18
C1
11
Q4
15
Q2
17
D2
4
Q7
12
D7
9
C97
10n
U19E
HC00
VCC
14
GND
7
1
U24A
HC32
1
2
3
J17
Con40
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
R181
56
C93
100nF
Q15
BC857B
R188
56
1
U24D
HC32
12
13
11
R177
56
J11
U23B
27C51
2-90
VCC
32
GND
16
R184
56
R194
10K
J18
Con40
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
R158
120
C91
15uF-6.3V
R193
56
&
U19C
HC00
9
10
8
C94
100nF
C87100nF
U20A
HC138
A0
1
A1
2
A2
3
Y0
15
Y1
14
Y2
13
Y3
12
Y4
11
Y5
10
Y6
9
Y7
7
E1A
4
E2A
5
E3
6
1
U15B
HC02
5
6
4
U16B
HC573
VCC
20
GND
10
1
U24B
HC32
4
5
6
R202
10K
R165
100K
C98
10n
U23A
27C512-90JC
A15
2
A0
11
A1
10
A2
9
A3
8
A4
7
A5
6
A6
5
A7
4
A8
29
A9
28
A10
24
A11
27
A12
3
A13
30
OE/VPP
25
CE
23
A14
31
O0
13
O1
14
O2
15
O3
18
O4
19
O5
20
O6
21
O7
22
J12
&
U19D
HC00
12
13
11
1
U15D
HC02
11
12
13
R199
10K
R161
100K
U13B
HC574
VCC
20
GND
10
U15E
HC02
VCC
14
GND
7
U26D
HC10
VCC
14
GND
7
R169
100K
R189
56