W86L488AY WINBOND [Winbond], W86L488AY Datasheet - Page 22

• Manufacturer Part Number: W86L488AY
• Description: SD/ SDIO/ MMC MEMORY CARD BRIDGE
• Manufacturer: WINBOND [Winbond]

7. FUCNTIONAL DESCRIPTION
7.1 Host Interface
The Host interface type may be type 1 or type 2. and the data size of the data bus may be 16-bit or 8-
bit.
Host Interface Type 1:
The Host interface type 1 is selected when XTYP2 pin is low. Figure 7-1 shows the timing of 16-bit
CPU read and write in type 1. Figure 7-2 is the timing of 16-bit CPU write high byte and write low byte.
Figure 7-3 and 7-4 show the timing of CPU 8-bit data bus read and write in type 1.
A[3:1]
D[15:0]
XCSN
XRDN
XWRHN
XWRLN
A[3:1]
D[15:0]
XCSN
XWRHN
XWRLN
Fig. 7-2 High Byte and Low Byte Write Access in Host I/F Type 1.
Fig. 7-1 16-bit Read and Write Access in Host I/F Typ
DO[15:0]
DI[15:8]
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Publication Release Date: February 5, 2004
Preliminary W86L488
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e 1.
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Revision 0.82