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參數(shù)資料
| 型號： | KU386 |
| 廠商： | Intel Corp. |
| 英文描述： | SX MICROPROCESSOR |
| 中文描述： | SX微處理器 |
| 文件頁數(shù)： | 5/102頁 |
| 文件大?。?/td> | 1268K |
| 代理商： | KU386 |
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Intel386
TM
SX MICROPROCESSOR
1.0 PIN DESCRIPTION
(Continued)
Symbol
Type
Pin
Name and Function
HOLD
I
4
Bus Hold Request
input allows another bus master to request
control of the local bus. See
Bus Arbitration Signals
for
additional information.
HLDA
O
3
Bus Hold Acknowledge
output indicates that the Intel386 SX
Microprocessor has surrendered control of its local bus to
another bus master. See
Bus Arbitration Signals
for additional
information.
INTR
I
40
Interrupt Request
is a maskable input that signals the Intel386
SX Microprocessor to suspend execution of the current program
and execute an interrupt acknowledge function. See
Interrupt
Signals
for additional information.
NMI
I
38
Non-Maskable Interrupt Request
is a non-maskable input that
signals the Intel386 SX Microprocessor to suspend execution of
the current program and execute an interrupt acknowledge
function. See
Interrupt Signals
for additional information.
BUSY
Y
I
34
Busy
signals a busy condition from a processor extension. See
Coprocessor Interface Signals
for additional information.
ERROR
Y
I
36
Error
signals an error condition from a processor extension. See
Coprocessor Interface Signals
for additional information.
PEREQ
I
37
Processor Extension Request
indicates that the processor has
data to be transferred by the Intel386 SX Microprocessor. See
Coprocessor Interface Signals
for additional information.
FLT
Y
I
28
Float
is an input which forces all bidirectional and output signals,
including HLDA, to the tri-state condition. This allows the
electrically isolated Intel386SX PQFP to use ONCE (On-Circuit
Emulation) method without removing it from the PCB. See
Float
for additional information.
N/C
-
20, 27, 29-31, 43-47
No Connects
should always be left unconnected. Connection of
a N/C pin may cause the processor to malfunction or be
incompatible with future steppings of the Intel386 SX
Microprocessor.
V
CC
I
8-10,21,32,39
42,48,57,69,
71,84,91,97
System Power
provides the
a
5V nominal DC supply input.
V
SS
I
2,5,11-14,22
35,41,49-50,
63,67-68,
77-78,85,98
System Ground
provides the 0V connection from which all
inputs and outputs are measured.
5
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