Fluke 93 - Page 138

7-12
CORRECTIVE MAINTENANCE
Table 7.2 Signals measured
on
microprocessor
D1201.
Logic
ObOV,
Logic 1»-i-5V
Comp Name (pin)
Scope
Freq.
Data Description
Circ/lC
H/LiA
D1201
1 AD01 /AD1/P3
riJlJTnjlJ
1-5
MHz A
Address
Dalai /Address
Datal ports
2 ADOO/ADO/P3
rXJTJnJTJlJ
2 MHz
A
Address DataO/Address
DataO por13
3
2 MHz
A Read noVRead
4 ADVN /AL£/ADV
2 MHz A Address valid not/Address
latch enable/Address valid
output
5 /INST
1 nn
200 kHz A /Instruction fetch for externaJ
memory
e
/BUSWIDTH 0
1
/Buswidth selection, 8
or
16
bit
7
MPCLKoi;T/cLKoirr
AAAAj-
.
6.25
MHz
A
pP
clock ouVcIock out 1/2
oscillation frequency
50%
duty cycle
8 /^•TAL2
/\
A
A
A
12.5 MHz A /Crystal
V
\/ \/
9 /X-TAL1 12.5 MHz A /Crystal
10 A/SS 0
1
/Voltage supply
ground
(0)
11 A/SS
n 1
/Voltage supply
ground
(0)
12 NCC 0 H /Main supply (45V)
13 A^CC 0 H /Main supply (45V)
14 /EA
I*
0 H /External access
15 /NMI
mill
iiiiiiiiini
A /NonMaskable Interrupt
16
yPO.3
0 H /port 0.3
17 /ACH1 0 H /Artslog channel 1
18 /ACHO
0
0 H /Analog channel 0