參數(shù)資料
型號(hào): intel i387
廠商: Intel Corp.
英文描述: Military I387 Math Coprocessor(軍用I387數(shù)學(xué)協(xié)處理器)
中文描述: 軍事I387數(shù)學(xué)協(xié)處理器(軍用I387數(shù)學(xué)協(xié)處理器)
文件頁數(shù): 17/41頁
文件大?。?/td> 457K
代理商: INTEL I387
MILITARY i387
TM
MATH COPROCESSOR
Table 3.1. i387
TM
NPX Pin Summary
Pin
Name
Function
Active
State
Input/
Output
Referenced
To
386CLK2
387CLK2
CKM
RESETIN
i386 Microprocessor CLocK 2
i387 NPX CLocK 2
i387 NPX CLocKing Mode
System reset
I
I
I
I
High
386CLK2
PEREQ
Processor Extension
REQuest
Busy status
Error status
High
O
386CLK2/STEN
BUSY
ERROR
Low
Low
O
O
386CLK2/STEN
387CLK2/STEN
D31–D0
W/R
ADS
READY
READYO
Data pins
Write/Read bus cycle
ADdress Strobe
Bus ready input
Ready output
High
Hi/Lo
Low
Low
Low
I/O
I
I
I
O
386CLK2
386CLK2
386CLK2
386CLK2
386CLK2/STEN
STEN
NPS1
NPS2
CMD0
STatus ENable
NPX select
Y
1
NPX select
Y
2
CoMmanD
High
Low
High
Low
I
I
I
I
386CLK2
386CLK2
386CLK2
386CLK2
V
CC
V
SS
I
I
NOTE:
STEN is referenced to only when getting the output pins into or out of tristate mode.
Table 3.2a. i387
TM
NPX PGA Pin Cross-Reference
Pin
Signal
A2
D9
A3
D11
A4
D12
A5
D14
A6
V
CC
A7
D16
A8
D18
A9
V
CC
A10
D21
B1
D8
B2
V
SS
B3
D10
B4
V
CC
B5
D13
B6
D15
B7
V
SS
B8
D17
Pin
Signal
B9
D19
B10
D20
B11
D22
C1
D7
C2
D6
C10
D23
C11
V
SS
D1
D5
D2
D4
D10
D24
D11
D25
E1
V
CC
E2
V
SS
E10
D26
E11
D27
F1
V
CC
F2
V
SS
Pin
Signal
F10
V
CC
F11
V
SS
G1
D3
G2
D2
G10
D28
G11
D29
H1
D1
H2
D0
H10
D30
H11
D31
J1
V
SS
J2
V
CC
J10
V
SS
J11
CKM
K1
PEREQ
K2
BUSY
K3
Tie High
Pin
Signal
K4
W/R
K5
V
CC
K6
NPS2
K7
ADS
K8
READY
K9
No Connect
K10
386CLK2
K11
387CLK2
L2
ERROR
L3
READYO
L4
STEN
L5
V
SS
L6
NPS1
L7
V
CC
L8
CMD0
L9
Tie High
L10
RESETIN
17
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