82C836 Datasheet, PDF (172/205 Pages) List of Unclassifed Manufacturers – Single-Chip 386sx AT

s AC Characteristics 16- and 20MHz
Table 12-5. DRAM Parameter Specifications
Parameter
Read data valid from RAS active (tRAC)
Read data valid from CAS active (tCAC)
Read data valid from column address (tAA)
CAS active time (tCAS)
CAS precharge time in page mode (tCP)
CAS cycle time in page mode (tPC)
CAS fall to RAS rise (tRSH)
System Characteristics
16MHz
Min. Max.
---- 100
---- 35
---- 55
35 ----
15 ----
85 ----
40 ----
20MHz
Min. Max.
---- 80
---- 25
---- 45
25 ----
15 ----
70 ----
25 ----
CPU to Local Memory
Tables 12-6 through 12-8 summarizes CPU to memory specification requirements.
Table 12-6. CPU to Local Memory----Output Responses
Symbol
t100
t101
t102
t103
t104
t105
t106
t107
t108
t109
t110
t111
t112
t113
Parameters
RAS active from PROCCLK rise
RAS inactive from PROCCLK rise
CAS active from PROCCLK rise
CAS inactive from PROCCLK rise
Row address valid from PROCCLK rise
Row address hold from PROCCLK rise
Row address valid from A0-23 in
Column address valid from PROCCLK rise
Column address hold from PROCCLK rise
Column address valid from A0-23 in
-MWE fall from -CAS rise
-MWE rise from PROCCLK rise
PARL, PARH valid from D0-15 write data in
-READY delay from PROCCLK rise
* 60ns maximum for 82C836A-20.
16MHz
Min. Max.
---- 33
---- 33
---- 23
---- 28
---- 40
0
----
---- 50
---- 19
0
----
---- 50
0
60
---- 33
---- 55
4
40
20MHz
Min. Max.
---- 23
---- 32
---- 23
---- 27
---- 32
0
----
---- 50
---- 19
0
----
---- 47
0
48*
---- 32
---- 55
4
38
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