w86l388-dg Winbond Electronics Corp America, w86l388-dg Datasheet - Page 10

• Manufacturer Part Number: w86l388-dg
• Description: Winbond Host Interface Sd/mmc Memory Card Bridge
• Manufacturer: Winbond Electronics Corp America

6. FUCNTIONAL DESCRIPTION
6.1
The Host interface type may be type 1 or type. The read cycle always 16-bit access and the write
cycle may be 16-bit access or high byte or low byte access.
Host Interface Type 1:
The Host interface type 1 is selected when XTYP2 pin is low. Figure 7-1 shows the timing of CPU read
and write in type 1. Figure 7-2 is the timing of CPU write high byte and write 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]
- 8 -
DI[15:0]
DI[7:0]
W86L388D