EIP 545A - Page 46

Figure 6-1. Microprocessor Free Running Signatures
CLOCK
A1 05 TP8
IN
STOP
A105 TP2
I
I\
CONNECTIONS
BUTTONS
LINE
A0 (PI Pin 54)
A1 (PI Pin 54)
A2
(PI Pin 52)
A3
(PI Pin 51)
A4
(PI Pin 50)
A5
(PI Pin 49)
A6
(PI Pin 48)
A7
(PI Pin 47)
A8
(PI Pin 46)
A9
(PI Pin 45)
A10
(PI Pin 44)
A1 1
(PI Pin 43)
A12
(PI Pin 42)
A13
(PI Pin 41)
A14
(PI Pin 40)
A15
(PI Pin 39)
U1 Pin 5
U2 Pin 9
U4 Pin 2
8
10
12
U5 Pin 6
8
12
START
A105 TP2
IN
+ 5V 0003, phase 2 0003
Due to the synchronous qualities of the signature analyzer, phase 2 will read the same as + 5V but
the logic probe will be flashing. Likewise, anything gated with phase 2 may have the same signature
as the ungated signal.
LINE
U8 Pin 8
12
U11 Pin 2
4
6
8
11
13
15
17
U12 Pin 2
4
6
8
11
13
15
17
U18 Pin 4
5
6
7
9
10
11
12
SIGNATURE
UUUU
FFFF
8484
P763
1 U5P
0356
U759
6F9A
7791
6321
37C5
6U28
4FCA
4868
9UP 1
00001
0003
75HA
6U2C
9UP3
9UP2
0002
755 F
PACU
0003
SIGNATURE
9UPO
755P
9UP1
4FCA
37C5
7791
6321
61128
4868
00001
U759
1 U5P
8484
UUUU
FFFF
P763
0356
6F9A
6H4C
0994
U3H7
P257
854 F
H602
25P6
9F14
Scans by ArtekMedia © 2007