82C836 Datasheet, PDF (190/205 Pages) List of Unclassifed Manufacturers – Single-Chip 386sx AT

s AC Characteristics 25MHz
System Characteristics
Table 12-45. Miscellaneous Parameters----Input Requirements
Symbol
t310
t311
t312
t313
t314
t315
t316
t317
t318
Parameters
CXIN cycle time
CXIN low time
CXIN high time
-NPBUSY active pulse width
-NPERR fall after -BUSY fall
-NPERR fall before -NPBUSY rise
-NPERR active pulse width
-READY setup before PROCCLK rise
-READY hold after PROCCLK rise
Note: t317 and t318 apply to coprocessor accesses only.
Min.
Max.
20
----
9
----
9
----
30
----
0
----
25
----
30
----
9
----
4
----
Local Bus Access and Cache
The local bus access and cache timing specifications are shown in Tables 12-46
through 12-48.
Table 12-46. Local Bus Access and Cache----Output Responses
Symbol
t342
t343
Parameters
-CAS inactive from -READY rise
-CAS fall from PROCCLK fall during local memory write in Early
READY mode
* Not applicable for 82C836B. 20ns maximum for 82C836A.
Min.
Max.
1
----
----
*
Table 12-47. Local Bus Access and Cache----Formula Specifications
Symbol
te343
Critical Path
Parity setup in early READY write
* Not applicable for 82C836B. 14ns maximum for 82C836A.
Formula
t112-t343
Max.
*
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