w86l488y-ay Winbond Electronics Corp America, w86l488y-ay Datasheet - Page 21

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

7. FUCNTIONAL DESCRIPTION
7.1
The Host interface can support Type 1 or Type 2 that depends on different microprocessors. The data
bus width should be configured as 16-bit.
Host Interface Type 1:
Figure 7-1 shows the transaction of specified 16-bit microprocessors. Figure 7-2 is the timing of 16-bit
microprocessors writes high and low byte.
Host Interface
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 Type 1.
DO[15:0]
DI[15:8]
- 18 -
DI[15:0]
DI[7:0]
W86L488