ALE
CSB
WRB
RDB
AD
RDY
tpw3
tp1
tsu1
th1
tsu2
tpw1
th2
address
td1
Z
X
td2
tsu3
th4
data
tpw2
th3
X
td3
Z
Symbol
Parameter
Min
tsu1 Setup AD address valid to ALE ↓
5*
tsu2 Setup CSB ↓ to WRB ↓
0
tsu3 Setup AD data valid to WRB ↑
10 *
td1 Delay CSB ↓ to RDY active
td2 Delay WRB ↓ to RDY ↓
td3 Delay CSB ↑ to RDY High-Z
tpw1 WRB low time
60
tpw2 RDY low time
20
tpw3 ALE high time
10 *
th1 Hold AD address valid after ALE ↓ 5 *
th2 Hold CSB low after WRB ↑
0
th3 Hold WRB low after RDY ↑
0
th4 AD data hold valid after WRB ↑
5*
tp1 Time between ALE ↓ and WRB ↓
0*
tp2
Time between consecutive accesses
(WRB ↑ to ALE ↑)
60
Typ Max
10 *
10 *
10 *
60
Figure 5: Write access timing in MULTIPLEXED Mode.
Note: preliminary timing information. Timing values marked with * TBA.
15
ACS411CS PRE-RELEASE Issue 6.0 July 1999.