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參數(shù)資料
| 型號： | C186EA20 |
| 廠商： | Intel Corp. |
| 元件分類： | DC/DC變換器 |
| 英文描述： | RSO-S_D(Z) Series - Econoline Regulated DC-DC Converters; Input Voltage (Vdc): 12V; Output Voltage (Vdc): 12V; Power: 1W; 2:1 and 4:1 Wide Input Voltage Ranges; 1kVDC, 2kVD & 3kVDC Isolation; UL94V-0 Package Material; Continuous Short Circuit Protectionwith Current Foldback; Low Noise; No External Capacitor needed; Efficiency to 83% |
| 中文描述： | 16位高集成嵌入式處理器 |
| 文件頁數(shù)： | 11/50頁 |
| 文件大?。?/td> | 709K |
| 代理商： | C186EA20 |
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80C186EA/80C188EA, 80L186EA/80L188EA
Table 3. Pin Descriptions
Pin
Name
Pin
Type
Input
Type
Output
States
Description
V
CC
P
POWER
connections consist of six pins which must be shorted
externally to a V
CC
board plane.
V
SS
G
GROUND
connections consist of five pins which must be shorted
externally to a V
SS
board plane.
CLKIN
I
A(E)
CLocK INput
is an input for an external clock. An external
oscillator operating at two times the required processor operating
frequency can be connected to CLKIN. For crystal operation,
CLKIN (along with OSCOUT) are the crystal connections to an
internal Pierce oscillator.
OSCOUT
O
H(Q)
R(Q)
P(Q)
OSCillator OUTput
is only used when using a crystal to generate
the external clock. OSCOUT (along with CLKIN) are the crystal
connections to an internal Pierce oscillator. This pin is not to be
used as 2X clock output for non-crystal applications (i.e., this pin is
N.C. for non-crystal applications). OSCOUT does not float in
ONCE mode.
CLKOUT
O
H(Q)
R(Q)
P(Q)
CLocK OUTput
provides a timing reference for inputs and outputs
of the processor, and is one-half the input clock (CLKIN)
frequency. CLKOUT has a 50% duty cycle and transistions every
falling edge of CLKIN.
RESIN
I
A(L)
RESet IN
causes the processor to immediately terminate any bus
cycle in progress and assume an initialized state. All pins will be
driven to a known state, and RESOUT will also be driven active.
The rising edge (low-to-high) transition synchronizes CLKOUT with
CLKIN before the processor begins fetching opcodes at memory
location 0FFFF0H.
RESOUT
O
H(0)
R(1)
P(0)
RESet OUTput
that indicates the processor is currently in the
reset state. RESOUT will remain active as long as RESIN remains
active. When tied to the TEST/BUSY pin, RESOUT forces the
80C186EA into Numerics Mode.
PDTMR
I/O
A(L)
H(WH)
R(Z)
P(1)
Power-Down TiMeR
pin (normally connected to an external
capacitor) that determines the amount of time the processor waits
after an exit from power down before resuming normal operation.
The duration of time required will depend on the startup
characteristics of the crystal oscillator.
NMI
I
A(E)
Non-Maskable Interrupt
input causes a Type 2 interrupt to be
serviced by the CPU. NMI is latched internally.
TEST/BUSY
(TEST)
I
A(E)
TEST/BUSY
is sampled upon reset to determine whether the
80C186EA is to enter Numerics Mode. In regular operation, the pin
is
TEST.
TEST is used during the execution of the WAIT
instruction to suspend CPU operation until the pin is sampled
active (low). In Numerics Mode, the pin is
BUSY
. BUSY notifies the
80C186EA of 80C187 Numerics Coprocessor activity.
AD15:0
(AD7:0)
I/O
S(L)
H(Z)
R(Z)
P(X)
These pins provide a multiplexed
Address
and
Data
bus. During
the address phase of the bus cycle, address bits 0 through 15 (0
through 7 on the 8-bit bus versions) are presented on the bus and
can be latched using ALE. 8- or 16-bit data information is
transferred during the data phase of the bus cycle.
NOTE:
Pin names in parentheses apply to the 80C188EA and 80L188EA.
11
11
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