參數(shù)資料
型號(hào): intel386 DX
廠商: Intel Corp.
英文描述: 32-Bit CHMOS Microprocessor With Integrated Memory Management(32位CHMOS 微處理器帶集成存儲(chǔ)管理)
中文描述: 32位CHMOS微處理器集成內(nèi)存管理(32位CHMOS微處理器帶集成存儲(chǔ)管理)
文件頁數(shù): 6/139頁
文件大小: 1587K
代理商: INTEL386 DX
Intel386
TM
DX MICROPROCESSOR
1.1 PIN DESCRIPTION TABLE
The following table lists a brief description of each pin on the Intel386 DX. The following definitions are used in
these descriptions:
Y
The named signal is active LOW.
I
Input signal.
O
Output signal.
I/O
Input and Output signal.
D
No electrical connection.
For a more complete description refer to Section 5.2 Signal Description.
Symbol
Type
Name and Function
CLK2
I
CLK2
provides the fundamental timing for the Intel386 DX.
D
31
–D
0
I/O
DATA BUS
inputs data during memory, I/O and interrupt acknowledge
read cycles and outputs data during memory and I/O write cycles.
A
31
–A
2
BE0
Y
–BE3
Y
O
ADDRESS BUS
outputs physical memory or port I/O addresses.
O
BYTE ENABLES
indicate which data bytes of the data bus take part in
a bus cycle.
W/R
Y
O
WRITE/READ
is a bus cycle definition pin that distinguishes write
cycles from read cycles.
D/C
Y
O
DATA/CONTROL
is a bus cycle definition pin that distinguishes data
cycles, either memory or I/O, from control cycles which are: interrupt
acknowledge, halt, and instruction fetching.
M/IO
Y
O
MEMORY I/O
is a bus cycle definition pin that distinguishes memory
cycles from input/output cycles.
LOCK
Y
O
BUS LOCK
is a bus cycle definition pin that indicates that other
system bus masters are denied access to the system bus while it is
active.
ADS
Y
O
ADDRESS STATUS
indicates that a valid bus cycle definition and
address (W/R
Y
, D/C
Y
, M/IO
Y
, BE0
Y
, BE1
Y
, BE2
Y
, BE3
Y
and
A
31
–A
2
) are being driven at the Intel386 DX pins.
NA
Y
I
NEXT ADDRESS
is used to request address pipelining.
READY
Y
I
BUS READY
terminates the bus cycle.
BS16
Y
I
BUS SIZE 16
input allows direct connection of 32-bit and 16-bit data
buses.
HOLD
I
BUS HOLD REQUEST
input allows another bus master to request
control of the local bus.
6
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