參數(shù)資料
型號(hào)： 376
廠商： Intel Corp.
英文描述： DIODE SCHOTTKY DUAL-DUAL SERIES 30V 200mW 0.38V-vf 200mA-IFM 1mA-IF 0.2uA-IR SOT-363 3K/REEL
中文描述： 376TM，高性能32位嵌入式處理器
文件頁數(shù)： 71/95頁
文件大?。?/td> 1293K
代理商： 376
376 EMBEDDED PROCESSOR
7.0 DIFFERENCES BETWEEN THE
80376 AND THE 80386
The following are the major differences between the
80376 and the 80386.
1. The 80376 generates byte selects on BHE and
BLE (like the 8086 and 80286 microprocessors)
to distinguish the upper and lower bytes on its
16-bit data bus. The 80386 uses four-byte selects,
BE0–BE3, to distinguish between the different
bytes on its 32-bit bus.
2. The 80376 has no bus sizing option. The 80386
can select between either a 32-bit bus or a 16-bit
bus by use of the BS16 input. The 80376 has a
16-bit bus size.
3. The NA pin operation in the 80376 is identical to
that of the NA pin on the 80386 with one excep-
tion: the NA pin of the 80386 cannot be activated
on 16-bit bus cycles (where BS16 is LOW in the
80386 case), whereas NA can be activated on
any 80376 bus cycle.
4. The contents of all 80376 registers at reset are
identical to the contents of the 80386 registers at
reset, except the DX register. The DX register
contains a component-stepping identifier at reset,
i.e.
in 80386, after reset DH
e
03H indicates 80386
DL
e
revision number;
in 80376, after reset DH
e
33H indicates 80376
DL
e
revision number.
5. The 80386 uses A
31
and M/IO as a select for
numerics coprocessor. The 80376 uses the
A
23
and M/IO to select its numerics coproces-
sor.
6. The 80386 prefetch unit fetches code in four-
byte units. The 80376 prefetch unit reads two
bytes as one unit (like the 80286 microproces-
sor). In BS16 mode, the 80386 takes two con-
secutive bus cycles to complete a prefetch re-
quest. If there is a data read or write request
after the prefetch starts, the 80386 will fetch
all four bytes before addressing the new re-
quest.
7. The 80376 has no paging mechanism.
8. The 80376 starts executing code in what corre-
sponds to the 80386 protected mode. The 80386
starts execution in real mode, which is then used
to enter protected mode.
9. The 80386 has a virtual-86 mode that allows the
execution of a real mode 8086 program as a task
in protected mode. The 80376 has no virtual-86
mode.
10. The 80386 maps a 48-bit logical address into a
32-bit physical address by segmentation and
paging. The 80376 maps its 48-bit logical ad-
dress into a 24-bit physical address by segmen-
tation only.
11. The 80376 uses the 80387SX numerics coproc-
essor for floating point operations, while the
80386 uses the 80387 coprocessor.
12. The 80386 can execute from 16-bit code seg-
ments. The 80376 can
only
execute from 32-bit
code Segments.
13. The 80376 has an input called FLT which three-
states all bidirectional and output pins, including
HLDA, when asserted. It is used with ON Circuit
Emulation (ONCE).
8.0 INSTRUCTION SET
This section describes the 376 embedded processor
instruction set. Table 8.1 lists all instructions along
with
instruction
encoding
counts. Further details of the instruction encoding
are then provided in the following sections, which
completely describe the encoding structure and the
definition of all fields occurring within 80376 instruc-
tions.
diagrams
and
clock
8.1 80376 Instruction Encoding and
Clock Count Summary
To calculate elapsed time for an instruction, multiply
the instruction clock count, as listed in Table 8.1 be-
low, by the processor clock period (e.g. 50 ns for an
80376 operating at 20 MHz). The actual clock count
of an 80376 program will average 10% more
71
相關(guān)PDF資料
PDF描述
37LV128-TISN DIODE ZENER SINGLE 200mW 2.7Vz 5mA-Izt 0.0741 20uA-Ir 1 SOD-323 3K/REEL
37LV128-TL DIODE ZENER SINGLE 150mW 2.7Vz 5mA-Izt 0.074 20uA-Ir 1 SOD-523 3K/REEL
37LV128-TP DIODE/SM, ZEN 30V .5MA 0.41W +/-5% SOD-123
37LV128-TSN 36K, 64K, and 128K Serial EPROM Family
37LV128-IL 36K, 64K, and 128K Serial EPROM Family
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
376 制造商:Pro-Signal 功能描述:; Supply Voltage:28VDC; Lamp Base Type:M
37-6.8 制造商:Distributed By MCM 功能描述:Resistor 1/2W 6.8 Ohm Flameproof, Bag of 20 制造商:MCM 功能描述:1/2 Watt Flameproof Resistors, Resistance: 6.8 Ohm, Tolerance: 5 %, Quantity: 20 per bag
37-6.8K 制造商:Distributed By MCM 功能描述:Resistor 1/2W 6.8K Ohm Flameproof, Bag of 20 制造商:MCM 功能描述:RESISTOR 1/2W 6.8K OHM FLAMPRF20 PER BAG
376/377-1ZM 制造商:Rayovac 功能描述:SILVER ELECTRONIC BTRY 1PK MERCURY FREE
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