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| 型號： | Embedded Pentium 166 |
| 廠商： | Intel Corp. |
| 英文描述： | 32 Bit Embedded Pentium Processor(32位嵌入式奔騰處理器) |
| 中文描述： | 32位嵌入式奔騰處理器（32位嵌入式奔騰處理器） |
| 文件頁數(shù)： | 31/42頁 |
| 文件大?。?/td> | 882K |
| 代理商： | EMBEDDED PENTIUM 166 |
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Embedded Pentium
Processor
Datasheet
31
3.5
AC Specifications
The AC specifications of the Pentium processor consist of setup times, hold times, and valid delays
at 0 pF.
3.5.1
Private Bus
When two Pentium processor are operating in dual processor mode, a “private bus” exists to
arbitrate for the processor bus and maintain local cache coherency. The private bus consists of two
pinout changes:
1. Five pins are added: PBREQ#, PBGNT#, PHIT#, PHITM#, D/P#.
2. Ten output pins become I/O pins: ADS#, D/C#, W/R#, M/IO#, CACHE#, LOCK#, HIT#,
HITM#, HLDA, SCYC.
The new pins are given AC specifications of valid delays at 0 pF, setup times, and hold times.
Simulate with these parameters and their respective I/O buffer models to guarantee that proper
timings are met.
The AC specification gives input setup and hold times for the ten signals that become I/O pins.
These setup and hold times must only be met when a dual processor is present in the system.
3.5.2
Power and Ground
For clean on-chip power distribution, the Pentium processor has 53 V
CC
(power) and 53 V
SS
(ground) inputs. Power and ground connections must be made to all external V
CC
and V
SS
pins of
the processor. On the circuit board all V
CC
pins must be connected to a V
CC
plane. All V
SS
pins
must be connected to a V
SS
plane.
Table 18. Input and Output Characteristics
Symbol
Parameter
Min
Max
Unit
Notes
C
IN
C
O
C
I/O
C
CLK
C
TIN
C
TOUT
C
TCK
Input Capacitance
Output Capacitance
I/O Capacitance
CLK Input Capacitance
Test Input Capacitance
Test Output Capacitance
Test Clock Capacitance
15
20
25
15
15
20
15
pF
pF
pF
pF
pF
pF
pF
Guaranteed by design.
Guaranteed by design.
Guaranteed by design.
Guaranteed by design.
Guaranteed by design.
Guaranteed by design.
Guaranteed by design.
0 < V
IN
< V
CC3
, This
parameter is for input
without pullup or pulldown.
0 < V
IN
< V
, This
parameter is for input
without pullup or pulldown.
V
IN
= 2.4 V, This parameter
is for input with pulldown.
V
IN
= 0.4 V, This parameter
is for input with pullup.
I
LI
Input Leakage Current
I
LO
Output Leakage Current
I
IH
Input Leakage Current
200
I
IL
Input Leakage Current
–400
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