w86l488y-ay Winbond Electronics Corp America, w86l488y-ay Datasheet - Page 22

• Manufacturer Part Number: w86l488y-ay
• Description: Winbond Host Interface Sd/sdio/mmc Memory Card Bridge
• Manufacturer: Winbond Electronics Corp America

Host Interface Type 2:
The data size of the microprocessors data bus should be 16-bit and the access cycle may be in 3-
cycle or 2-cycle. Figure 7-3 shows the timing of microprocessors read write in type 2 and the access
cycle is 3-cycle access, figure 7-4 shows the timing of microprocessors read write in type 2 and the
access cycle is 2-cycle access.
A [3:1]
D [15:0]
X R D Y N
X B E [1:0]
A [3 :1 ]
D [1 5 :0 ]
X R D Y N
X B E [1 :0 ]
HC K I
X C S N
X A S N
X R W N
H C K I
X C S N
X A S N
X R W N
F ig. 7-3 R ead and W rite T im ing in H os t I/F T ype 2, 3-C ycle A cc ess .
F ig . 7 -4 R e a d a n d W rite T im in g in H o s t I/F T y p e 2 , 2 -C y c le A c c e s s .
Re ad cycle
R e a d c y c le
D O [1 5 :0 ]
D O [15:0]
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Publication Release Date: June 04, 2006
W rite cycle
W rite c y c le
D I[1 5 :0 ]
D I[1 5:0 ]
W86L488
Revision 1.21