W90221X Winbond Electronics Corp America, W90221X Datasheet - Page 185

• Manufacturer Part Number: W90221X
• Description: Pa-risc Embedded Controller
• Manufacturer: Winbond Electronics Corp America

Figure 7.3.3 Timing of WIO read cycle
Figure 7.3.4 Timing of SDRAM
W90221X version 0.6
Symbol
t rcd
t dpl
MCLK
CS#
RAS#
CAS#
WE#
MA[13:0]
MD[0:31]
Symbol
DATA
ADDR
RDB
RAS# to CAS# delay
Data-in to PRE Command Period
t rc
t asr
t rp
t ahr
t dsr
t dhr
Read cycle time
ADDR to RDB setup time
RDB pulse width
ADDR to RDB hold time
DATA to RDB setup time
DATA to RDB hold time
row 1
trcd
Parameter
col. 1
t
wd. 1
A S R
tras
Parameter
tdpl
trc
t
t
R C
R P
t
D S R
trp
row 2
t
t
A H R
D H R
col. 2
Min
1
1
tcl
Min
rd. 1
3
1
2
0
2
0
Max
8
4
Max
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PCICLK
PCICLK
PCICLK
PCICLK
PCICLK
PCICLK
MCLK
MCLK
Unit
Unit