A-7
SIGNAL DESCRIPTIONS

Figure A-3. 83C196LD 52-pin PLCC Package

A.2 DEFAULT CONDITIONSTable A-5 lists the values of the signals for the 87C196LA and 87C196LB during various oper-ating conditions. Table A-6 lists the same information for the 83C196LD. Table A-4 defines thesymbols used to represent the pin status. Refer to the DC characteristics table in the datasheet foractual specifications for VOL, VIL, VOH, and VIH.

Table A-4. Definition of Status Symbols

Symbol Definition Symbol Definition
0 Voltage less than or equal to VOL, VIL MD0 Medium pull-down
1 Voltage greater than or equal to VOH, VIH MD1 Medium pull-up
HiZ High impedance WK0 Weak pull-down
LoZ0 Low impedance; strongly driven low WK1 Weak pull-up
LoZ1 Low impedance; strongly driven high ODIO Open-drain I/O
A3403-02
P6.1 / EPA9
P6.0 / EPA8
P1.0 / EPA0 / T2CLK
P1.1 / EPA1
P1.2 / EPA2 / T2DIR
P1.3 / EPA3
V
CC
V
SS
P0.7
P0.6
P0.5
P0.4
P0.3
7.4P
/
5
1DA
#
LR
W
/ #RW / 2.5
P
#DR / 3.5P
V
PP
V
SS
ELA
/
#
VD
A / 0
.5P
V
SS
1LATX
2L
A
T
X
1DS / 7.6P
1CS
/
6
.6P
0DS / 5.6
P
0C
S
/
4.6P
AD14 / P4.6
AD13 / P4.5
AD12 / P4.4
AD11 / P4.3
AD10 / P4.2
AD9 / P4.1
AD8 / P4.0
AD7 / P3.7
AD6 / P3.6
AD5 / P3.5
AD4 / P3.4
AD3 / P3.3
AD2 / P3.2
46
45
44
43
42
41
40
39
38
37
36
35
34

xx83C196LD

View of component as

mounted on PC board

8
9
10
11
12
13
14
15
16
17
18
19
20
1
.3P
/
1
D
A
0
.3
P / 0DA
#T
E
SE
R
#AE
V
SS
V
CC
D
XT / 0.2
P
D
X
R / 1.2P
TN
I
T
X
E / 2.
2P
4
.2
P
#
E
CNO
/ 6.2
P
TUOKLC
/
7
.
2P
2.0P
12
22
32
42
52
62
72
82
92
03
13
23
33
7
6
5
4
3
2
1
25
15
05
94
84
74