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參數(shù)資料
| 型號： | TS80C188EB20 |
| 廠商： | INTEL CORP |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 16-BIT HIGH-INTEGRATION EMBEDDED PROCESSORS |
| 中文描述： | 16-BIT, 20 MHz, MICROPROCESSOR, PQFP80 |
| 封裝： | EIAJ, QFP-80 |
| 文件頁數(shù)： | 7/59頁 |
| 文件大小： | 779K |
| 代理商： | TS80C188EB20 |
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80C186EB/80C188EB, 80L186EB/80L188EB
Serial Communications Unit
The Serial Control Unit (SCU) of the 80C186EB con-
tains two independent channels. Each channel is
identical in operation except that only channel 0 is
supported by the integrated interrupt controller
(channel 1 has an external interrupt pin). Each
channel has its own baud rate generator that is in-
dependent of the Timer/Counter Unit, and can be
internally or externally clocked at up to one half the
80C186EB operating frequency.
Independent baud rate generators are provided for
each of the serial channels. For the asynchronous
modes, the generator supplies an 8x baud clock to
both the receive and transmit register logic. A 1x
baud clock is provided in the synchronous mode.
Chip-Select Unit
The 80C186EB Chip-Select Unit (CSU) integrates
logic which provides up to ten programmable chip-
selects to access both memories and peripherals. In
addition, each chip-select can be programmed to
automatically insert additional clocks (wait-states)
into the current bus cycle and automatically termi-
nate a bus cycle independent of the condition of the
READY input pin.
I/O Port Unit
The I/O Port Unit (IPU) on the 80C186EB supports
two 8-bit channels of input, output, or input/output
operation. Port 1 is multiplexed with the chip select
pins and is output only. Most of Port 2 is multiplexed
with the serial channel pins. Port 2 pins are limited to
either an output or input function depending on the
operation of the serial pin it is multiplexed with.
Refresh Control Unit
The Refresh Control Unit (RCU) automatically gen-
erates a periodic memory read bus cycle to keep
dynamic or pseudo-static memory refreshed. A 9-bit
counter controls the number of clocks between re-
fresh requests.
A 12-bit address generator is maintained by the RCU
and is presented on the A12:1 address lines during
the refresh bus cycle. Address bits A19:13 are pro-
grammable to allow the refresh address block to be
located on any 8 Kbyte boundary.
Power Management Unit
The 80C186EB Power Management Unit (PMU) is
provided to control the power consumption of the
device. The PMU provides three power modes: Ac-
tive, Idle, and Powerdown.
Active
80C186EB are functional and the device consumes
maximum power (depending on the level of periph-
eral operation). Idle Mode freezes the clocks of the
Execution and Bus units at a logic zero state (all
peripherals continue to operate normally).
Mode
indicates
that
all
units
on
the
The Powerdown mode freezes all internal clocks at
a logic zero level and disables the crystal oscillator.
All internal registers hold their values provided V
CC
is maintained. Current consumption is reduced to
just transistor junction leakage.
80C187 Interface (80C186EB Only)
The 80C186EB (PLCC package only) supports the
direct connection of the 80C187 Numerics Coproc-
essor.
ONCE Test Mode
To facilitate testing and inspection of devices when
fixed into a target system, the 80C186EB has a test
mode available which forces all output and input/
output pins to be placed in the high-impedance
state. ONCE stands for ‘‘ON Circuit Emulation’’. The
ONCE mode is selected by forcing the A19/ONCE
pin LOW (0) during a processor reset (this pin is
weakly held to a HIGH (1) level) while RESIN is ac-
tive.
7
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相關(guān)PDF資料 |
PDF描述 |
|---|---|
| TS80C188EB25 | 16-BIT HIGH-INTEGRATION EMBEDDED PROCESSORS |
| TSB14C01AI | 5-V IEEE 1394-1995 BACKPLANE TRANSCEIVER/ARBITER |
| TSB14C01AMHV | Circular Connector; No. of Contacts:79; Series:MS27497; Body Material:Aluminum; Connecting Termination:Crimp; Connector Shell Size:20; Circular Contact Gender:Pin; Circular Shell Style:Wall Mount Receptacle; Insert Arrangement:20-35 RoHS Compliant: No |
| TSB14C01AM | 5-V IEEE 1394-1995 BACKPLANE TRANSCEIVER/ARBITER |
| TSSOP-56 | Fairchild Semiconductor Product Package Material Disclosure |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TS80C188EB-20 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:16-Bit Microprocessor |
| TS80C188EB25 | 制造商:INTEL 制造商全稱:Intel Corporation 功能描述:16-BIT HIGH-INTEGRATION EMBEDDED PROCESSORS |
| TS80C188EC13 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:MICROPROCESSOR|16-BIT|CMOS|QFP|100PIN|PLASTIC |
| TS80C188EC-13 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:16-Bit Microprocessor |
| TS80C188EC-16 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:16-Bit Microprocessor |
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