參數(shù)資料
型號： AM188ER-25KCW
廠商： ADVANCED MICRO DEVICES INC
元件分類： 微控制器/微處理器
英文描述： CA-BAYONET
中文描述： 16-BIT, 25 MHz, MICROCONTROLLER, PQFP100
封裝： PLASTIC, QFP-100
文件頁數(shù)： 39/112頁
文件大?。?/td> 2878K
代理商： AM188ER-25KCW
Am186
TM
ER and Am188
TM
ER Microcontrollers Data Sheet
39
DRAFT
and external address latch that were required are elim-
inated.
Table 6.
Clocking Modes
V
CC
Power Supply (input)
These pins supply power (+3.3 V) to the microcontrol-
ler.
WHB
(Am186ER Microcontroller Only)
Write High Byte (output, three-state, synchronous)
This pin and WLB indicate to the system which bytes of
the data bus (upper, lower, or both) participate in a
write cycle. In 80C186 designs, this information is pro-
vided by BHE, AD0, and WR. However, by using WHB
and WLB, the standard system interface logic and ex-
ternal address latch that were required are eliminated.
WHB
is asserted with AD15–AD8. WHB is the logical
OR of BHE and WR. During reset, this pin is a pullup.
This pin is three-stated during bus holds and ONCE
mode.
WLB
(Am186ER Microcontroller Only)
WB (Am188ER Microcontroller Only)
Write Low Byte (output, three-state, synchronous)
Write Byte (output, three-state, synchronous)
WLB
—This pin and WHB indicate to the system which
bytes of the data bus (upper, lower, or both) participate
in a write cycle. In 80C186 designs, this information is
provided by BHE, AD0, and WR. However, by using
WHB and WLB, the standard system interface logic
WLB is asserted with AD7–AD0. WLB is the logical OR
of A0 and WR. This pin is three-stated during bus holds
and ONCE mode.
WB
—On the Am188ER microcontroller, this pin indi-
cates a write to the bus. WB uses the same early timing
as the nonmultiplexed address bus. WB is associated
with AD7–AD0. This pin is three-stated during bus
holds and ONCE mode.
WR
Write Strobe (output, synchronous)
This pin indicates to the system that the data on the bus
is to be written to a memory or I/O device. WR is three-
stated during a bus hold or reset condition.
X1
Crystal Input (input)
This pin and the X2 pin provide connections for a fun-
damental mode crystal used by the internal oscillator
circuit. If providing an external clock source, connect
the source to X1 and leave X2 unconnected. Unlike the
rest of the pins on the Am186ER and Am188ER micro-
input equal to V
CC
.
X2
Crystal Output (output)
This pin and the X1 pin provide connections for a fun-
damental mode crystal used by the internal oscillator
circuit. If providing an external clock source, connect
the source to X1 and leave X2 unconnected. Unlike the
rest of the pins on the Am186ER and Am188ER micro-
controllers, X2 is not 5-V tolerant.
CLKSEL2
H
H
L
L
CLKSEL1
H
L
H
L
Clocking Mode
Times Four
Divide by Two
Times One
Reserved
1
Notes:
1. The reserved clocking mode should not be used. Entering
the reserved clocking mode may cause unpredictable
system behavior.
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
AM188ER-25KI/W 制造商:未知廠家 制造商全稱:未知廠家 功能描述:16-Bit Microprocessor
AM188ER-25KIW 制造商:Advanced Micro Devices 功能描述:MCU 16-bit E86 CISC ROMLess 3.3V 100-Pin PQFP 制造商:AMD (Advanced Micro Devices) 功能描述:MCU 16-bit E86 CISC ROMLess 3.3V 100-Pin PQFP
AM188ER-25VC/W 制造商:未知廠家 制造商全稱:未知廠家 功能描述:16-Bit Microprocessor
AM188ER-25VCW 制造商:AMD 制造商全稱:Advanced Micro Devices 功能描述:High-Performance, 80C186- and 80C188-Compatible, 16-Bit Embedded Microcontrollers with RAM
AM188ER-25VD\\W 制造商:Advanced Micro Devices 功能描述:
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