參數(shù)資料
型號(hào)： INTEL486 SX
廠商： Intel Corp.
英文描述： Emedded Ultra-Low Power INTEL486 SX Processor(嵌入式超低能量處理器)
中文描述： Emedded超低功耗英特爾486山西處理器（嵌入式超低能量處理器）
文件頁(yè)數(shù)： 15/38頁(yè)
文件大?。?/td> 346K
代理商： INTEL486 SX
Embedded Ultra-Low Power Intel486 SX Processor
11
BOFF#
I
Backoff
nput forces the embedded ULP Intel486 SX processor to float its bus in
the next clock. The processor floats all pins normally floated during bus hold but
HLDA is not asserted in response to BOFF#. BOFF# has higher priority than RDY#
or BRDY#; if both are returned in the same clock, BOFF# takes effect. The
embedded ULP Intel486 SX processor remains in bus hold until BOFF# is
negated. If a bus cycle is in progress when BOFF# is asserted the cycle is
restarted. BOFF# is active LOW and must meet setup and hold times t
18
and t
19
for
proper operation.
CACHE INVALIDATION
AHOLD
I
Address Hold
request allows another bus master access to the embedded ULP
Intel486 SX processor
’s address bus for a cache invalidation cycle. The processor
stops driving its address bus in the clock following AHOLD going active. Only the
address bus is floated during address hold, the remainder of the bus remains
active. AHOLD is active HIGH and is provided with a small internal pull-down
resistor. For proper operation, AHOLD must meet setup and hold times t
18
and t
19
.
External Address
- This signal indicates that a
valid
external address has been
driven onto the embedded ULP Intel486 SX processor address pins. This address
is used to perform an internal cache invalidation cycle. EADS# is active LOW and
is provided with an internal pull-up resistor. EADS# must satisfy setup and hold
times t
12
and t
13
for proper operation.
EADS#
I
CACHE CONTROL
KEN#
I
Cache Enable
pin is used to determine whether the current cycle is cacheable.
When the embedded ULP Intel486 SX processor generates a cycle that can be
cached and KEN# is active one clock before RDY# or BRDY# during the first
transfer of the cycle, the cycle becomes a cache line fill cycle. Returning KEN#
active one clock before RDY# during the last read in the cache line fill causes the
line to be placed in the on-chip cache. KEN# is active LOW and is provided with a
small internal pull-up resistor. KEN# must satisfy setup and hold times t
14
and t
15
for proper operation.
Cache Flush
input forces the embedded ULP Intel486 SX processor to flush its
entire internal cache. FLUSH# is active LOW and need only be asserted for one
clock. FLUSH# is asynchronous but setup and hold times t
20
and t
21
must be met
for recognition in any specific clock.
FLUSH#
I
PAGE CACHEABILITY
PWT
PCD
O
O
Page Write-Through
and
Page Cache Disable
pins reflect the state of the page
attribute bits, PWT and PCD, in the page table entry, page directory entry or
control register 3 (CR3) when paging is enabled. When paging is disabled, the
embedded ULP Intel486 SX processor ignores the PCD and PWT bits and
assumes they are zero for the purpose of caching and driving PCD and PWT pins.
PWT and PCD have the same timing as the cycle definition pins (M/IO#, D/C#, and
W/R#). PWT and PCD are active HIGH and are not driven during bus hold. PCD is
masked by the cache disable bit (CD) in Control Register 0.
Table 4. Embedded ULP Intel486
SX Processor Pin Descriptions
(Sheet 5 of 6)
Symbol
Type
Name and Function
相關(guān)PDF資料
PDF描述
INTEL82801 82801AB (ICH0) I/O Controller Hub
INTEL82802AB Firmware Hub (FWH)
INTELDX2 High-Performance 32-Bit Embedded Processor(高性能32位嵌入式處理器)
INTELDX4 Embedded Write-Back Enhanced Processor(32位回復(fù)嵌入式增強(qiáng)型處理器)
IPS54511 FULLY PROTECTED HIGH SIDE POWER MOSFET SWITCH
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
INTEL740 制造商:未知廠家 制造商全稱(chēng):未知廠家 功能描述:64-Bit Graphics (GUI) Accelerator
INTEL82801 制造商:INTEL 制造商全稱(chēng):Intel Corporation 功能描述:82801AB (ICH0) I/O Controller Hub
INTEL82802AB 制造商:INTEL 制造商全稱(chēng):Intel Corporation 功能描述:Firmware Hub (FWH)
INTELLIGENT CHARGER + 4AA 制造商:Energizer 功能描述:Bulk
INTELLI-INCH-LR-STARTER K 制造商:ALL MOTION 功能描述:Intelli-Inch Stepper & Controller Starter Kit
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。

采購(gòu)需求

(若只采購(gòu)一條型號(hào)，填寫(xiě)一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

*型號(hào) *數(shù)量 廠商 批號(hào) 封裝
添加更多采購(gòu)

我的聯(lián)系方式

*
*
*