參數(shù)資料
型號(hào)： M80C186EB-13
廠(chǎng)商： Intel Corp.
英文描述： 16-Bit High-Integration Embedded Processor(16位高集成嵌入式處理器)
中文描述： 16位高性能嵌入式處理器集成（16位高集成嵌入式處理器）
文件頁(yè)數(shù)： 9/56頁(yè)
文件大?。?/td> 855K
代理商： M80C186EB-13
M80C186EB
BUS INTERFACE UNIT
The M80C186EB core incorporates a bus controller
that generates local bus control signals. In addition,
it employs a HOLD/HLDA protocol to share the local
bus with other bus masters.
The bus controller is responsible for generating 20
bits of address, read and write strobes, bus cycle
status information, and data (for write operations) in-
formation. It is also responsible for reading data off
the local bus during a read operation. A READY in-
put pin is provided to extend a bus cycle beyond the
minimum four states (clocks).
A HOLD/HLDA protocol is provided by the local bus
controller to allow multiple bus masters to share the
same local bus. When the M80C186EB relinquishes
control of the local bus, it floats certain bus control
signals to allow another bus master to drive these
pins directly. Refer to the Pin Description section to
determine which pins the M80C186EB will float dur-
ing a HOLD/HLDA bus exchange.
The M80C186EB local bus controller also generates
two control signals (DEN and DT/R) when interfac-
ing to external transceiver chips. This capability al-
lows the addition of transceivers for simple buffering
of the mulitplexed address/data bus.
CLOCK GENERATOR
The M80C186EB provides an on-chip clock genera-
tor for both internal and external clock generation.
The clock generator features a crystal oscillator, a
divide-by-two counter, and two low-power operating
modes.
The oscillator circuit is designed to be used with ei-
ther a
parallel resonant
fundamental or third-over-
tone mode crystal network. Alternatively, the oscilla-
tor circuit may be driven from an external clock
source. Figure 5 shows the various operating modes
of the M80C186EB oscillator circuit.
The crystal or clock frequency chosen must be twice
the required processor operating frequency due to
the internal divide-by-two counter. This counter is
used to drive all internal phase clocks and the exter-
nal CLKOUT signal. CLKOUT is a 50% duty cycle
processor clock and can be used to drive other sys-
tem components. All AC timings are referenced to
CLKOUT.
The following parameters are recommended when
choosing a crystal:
Temperature Range:
ESR (Equivalent Series Resistance):
C0 (Shunt Capacitance of Crystal):
C
L
(Load Capacitance):
Drive Level:
Application Specific
40
X
max
7.0 pF max
20 pF
g
2 pF
1 mW max
271214–4
(A) Crystal Connection
NOTE:
The L
1
C
1
network is
only
required when using a third-
overtone crystal.
271214–5
(B) Clock Connection
Figure 5. M80C186EB Clock Configurations
9
相關(guān)PDF資料
PDF描述
M80C186EB-16 16-Bit High-Integration Embedded Processor(16位高集成嵌入式處理器)
M80C186EB-8 16-Bit High-Integration Embedded Processor(16位高集成嵌入式處理器)
M80C186 CHMOS HIGH INTEGRATION 16-BIT MICROPROCESSOR
M80C186XL10 16-BIT HIGH-INTEGRATION EMBEDDED PROCESSOR
M80C186XL12 16-BIT HIGH-INTEGRATION EMBEDDED PROCESSOR
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
M80C186EB-16 制造商:INTEL 制造商全稱(chēng):Intel Corporation 功能描述:16-BIT HIGH-INTEGRATION EMBEDDED PROCESSOR
M80C186EB-8 制造商:INTEL 制造商全稱(chēng):Intel Corporation 功能描述:16-BIT HIGH-INTEGRATION EMBEDDED PROCESSOR
M80C186XL10 制造商:INTEL 制造商全稱(chēng):Intel Corporation 功能描述:16-BIT HIGH-INTEGRATION EMBEDDED PROCESSOR
M80C186XL12 制造商:INTEL 制造商全稱(chēng):Intel Corporation 功能描述:16-BIT HIGH-INTEGRATION EMBEDDED PROCESSOR
M80C186XL16 制造商:INTEL 制造商全稱(chēng):Intel Corporation 功能描述:16-BIT HIGH-INTEGRATION EMBEDDED PROCESSOR
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