參數資料
型號: 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管理)
中文描述: 32位CHMOS微處理器集成內存管理(32位CHMOS微處理器帶集成存儲管理)
文件頁數: 87/139頁
文件大?。?/td> 1587K
代理商: INTEL386 DX
Intel386
TM
DX MICROPROCESSOR
Certain types of 16-bit or 8-bit operands require no
adjustment for correct transfer on a 16-bit bus.
Those are read or write operands using only the low-
er half of the data bus, and write operands using
only the upper half of the bus since the Intel386 DX
simultaneously duplicates the write data on the low-
er half of the data bus. For these patterns of Byte
Enables and the R/W
Y
signals, BS16
Y
need not be
asserted at the Intel386 DX allowing NA
Y
to be as-
serted during the bus cycle if desired.
5.4.4 Interrupt Acknowledge (INTA)
Cycles
In response to an interrupt request on the INTR in-
put when interrupts are enabled, the Intel386 DX
performs two interrupt acknowledge cycles. These
bus cycles are similar to read cycles in that bus defi-
nition signals define the type of bus activity taking
place, and each cycle continues until acknowledged
by READY
Y
sampled asserted.
The state of A2 distinguishes the first and second
interrupt acknowledge cycles. The byte address
driven during the first interrupt acknowledge cycle is
4 (A31–A3 low, A2 high, BE3
Y
–BE1
Y
high, and
BE0
Y
low). The address driven during the second
interrupt acknowledge cycle is 0 (A31–A2 low,
BE3
Y
–BE1
Y
high, BE0
Y
low).
231630–26
Interrupt Vector (0–255) is read on D0–D7 at end of second Interrupt Acknowledge bus cycle.
Because each Interrupt Acknowledge bus cycle is followed by idle bus states, asserting NA
Y
has no practical effect. Choose the approach
which is simplest for your system hardware design.
Figure 5-22. Interrupt Acknowledge Cycles
87
相關PDF資料
PDF描述
Intel386 EX Highly Integrated, 32-Bit, Fully Static Embedded Micropocessor(32位高集成完全靜態(tài)嵌入式微處理器)
INTEL386 SXSA 5-V 32-Bit Fully Static Embedded Microprocessor(5V,32位完全靜態(tài)嵌入式微處理器)
intel386 SX 32-Bit CPU With a 16-Bit External Data Bus And a 24-bit External Address Bus(帶16位內部數據總線和24位內部地址總線32位微處理器)
INTEL386 Intel386 EX Embedded Microprocessor
Intel387 dx DX Math Coprocessor(32位數學協(xié)處理器)
相關代理商/技術參數
參數描述
INTEL386SX 制造商:INTEL 制造商全稱:Intel Corporation 功能描述:MICROPROCESSOR
INTEL387 制造商:INTEL 制造商全稱:Intel Corporation 功能描述:Intel387TM SX MATH COPROCESSOR
INTEL387DX 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Intel387 DX - MATH COPROCESSOR
INTEL387SX 制造商:INTEL 制造商全稱:Intel Corporation 功能描述:Intel387 SX - MATH COPROCESSOR
INTEL387TMDX 制造商:INTEL 制造商全稱:Intel Corporation 功能描述:Intel387TM DX MATH COPROCESSOR