80386DX
32-Bit Microprocessor
TABLE 1. 80386DX PIN DESCRIPTION
PIN
SYMBOL
DESCRIPTION
1-7, 9, 10, 12, 13, 16, 17, 20, A16-A11, A9, A10, A7, A8, A5, A6, Address Bus
21, 24, 146-149, 152-154, 156-
159, 161-163
A3, A4, A2, A31-A28, A27-A25,
A23-A22, A20-A18
8, 18, 19, 22, 23, 25, 28-30, 33,
36, 38-40, 47, 48, 65, 66, 68,
73, 76, 77, 82, 84, 86, 88, 103,
106, 107, 114, 125, 126, 129,
130,133, 134, 145, 155, 160,
164
NC
Not Connected
11, 15, 27, 32, 35, 43, 51, 53,
55, 57, 61, 70, 92, 95, 100, 111,
118, 122, 138, 142, 151
V
Ground
SS
14, 26, 31, 34, 44, 50, 52, 54,
56, 58, 62, 69, 91, 96, 99, 110,
117, 137, 141, 150,
V
Power Supply
CC
37
INTR
NMI
Interupt Request
41
Non-Maskable Interupt Request
Processor Extension Request
Error Status
42
PEREQ
ERROR
RESET
BUSY
45
46
Reset
49
Busy Status
59
LOCK
Bus Lock
60
W/R
Write/ Read
63
M/IO
Memory I/O
64
D/C
Data Control
67, 71, 72, 74
BE2, BE0, BE3, BE1
BS16
Byte Enables
78
75
79
80
81
83
Bus Size 16
NA
Next Address
HOLD
Bus Hold Request
CPU Clock 2
CLK2
ADS
Address Staus
Bus Ready Input
READY
85, 87, 89, 90, 93, 94, 97, 98, D1, D2, D4, D0, D6, D3, D8, D5, D7, Data Bus
102, 104, 105, 108, 109, 112, D10, D9, D12, D11, D14, D13, D15,
113, 115, 116, 119, 120, 121,
D16, D18, D17, D20, D22, D19,
123, 124, 127, 128, 131, 132, D24, D21, D25,D23, D27, D26, D29,
135, 136, 139, 140, 143, 144,
101
D28, D31, D30,
HLDA
Bus Hold Acknowledge
1000557
12.17.01 Rev1
All data sheets are subject to change without notice
2
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MAXWELL [ MAXWELL TECHNOLOGIES ]
