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參數(shù)資料
| 型號： | intel386 SX |
| 廠商： | Intel Corp. |
| 英文描述： | 32-Bit CPU With a 16-Bit External Data Bus And a 24-bit External Address Bus(帶16位內(nèi)部數(shù)據(jù)總線和24位內(nèi)部地址總線32位微處理器) |
| 中文描述： | 32位16位外部數(shù)據(jù)總線和24位外部地址總線CPU（帶16位內(nèi)部數(shù)據(jù)總線和24位內(nèi)部地址總線32位微處理器） |
| 文件頁數(shù)： | 65/102頁 |
| 文件大?。?/td> | 1166K |
| 代理商： | INTEL386 SX |
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Intel386
TM
SX MICROPROCESSOR
Table 7.1. Recommended Resistor Pull-ups to Vcc
Pin
Signal
Pull-up Value
Purpose
16
ADS
Y
20 K
X
g
10%
Lightly pull ADS
Y
inactive during
Intel386
TM
SX CPU hold acknowledge
states
26
LOCK
Y
20 K
X
g
10%
Lightly pull LOCK
Y
inactive during
Intel386
TM
SX CPU hold acknowledge
states
RESISTOR RECOMMENDATIONS
The ERROR
Y
, FLT
Y
and BUSY
Y
inputs have inter-
nal pull-up resistors of approximately 20 K
X
and the
PEREQ input has an internal pull-down resistor of
approximately 20 K
X
built into the Intel386 SX Mi-
croprocessor to keep these signals inactive when
the Intel387 SX is not present in the system (or tem-
porarily removed from its socket).
In typical designs, the external pull-up resistors
shown in Table 7.1 are recommended. However, a
particular design may have reason to adjust the re-
sistor values recommended here, or alter the use of
pull-up resistors in other ways.
OTHER CONNECTION RECOMMENDATIONS
For reliable operation, always connect unused in-
puts to an appropriate signal level. N/C pins should
always remain
unconnected. Connection of N/C
pins to Vcc or Vss will result in component mal-
function or incompatibility with future steppings
of the Intel386 SX Microprocessor
.
Particularly when not using interrupts or bus hold (as
when first prototyping), prevent any chance of spuri-
ous activity by connecting these associated inputs to
GND:
Pin
40
38
4
Signal
INTR
NMI
HOLD
If not using address pipelining, connect pin 6, NA
Y
,
through a pull-up in the range of 20 K
X
to Vcc.
7.2 Maximum Ratings
Table 7.2. Maximum Ratings
Parameter
Maximum Rating
Storage temperature
Case temperature under bias
Supply voltage with respect
to Vss
Voltage on other pins
b
65
§
C to 150
§
C
b
65
§
C to 110
§
C
b
.5V to 6.5V
b
.5V to (Vcc
a
.5)V
Table 7.2 gives stress ratings only, and functional
operation at the maximums is not guaranteed. Func-
tional operating conditions are given in section
7.3,
D.C. Specifications
, and section
7.4, A.C. Specifi-
cations
.
Extended exposure to the Maximum Ratings may af-
fect device reliability. Furthermore, although the
Intel386 SX Microprocessor contains protective cir-
cuitry to resist damage from static electric discharge,
always take precautions to avoid high static voltages
or electric fields.
65
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