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參數資料
型號: W86L488
廠商: WINBOND ELECTRONICS CORP
英文描述: SD/ SDIO/ MMC MEMORY CARD BRIDGE
中文描述: SD / SDIO記憶/ MMC記憶卡橋
文件頁數: 24/45頁
文件大小: 1842K
代理商: W86L488
Preliminary W86L488
Publication Release Date: February 5, 2004
- 21 -
Revision 0.82
Host Interface Type 2:
The Host interface type 2 is selected when XTYP2 pin is high. The data size of the CPU data bus may
be 16-bit or 8-bit and the access cycle may be in 3-cycle or 2-cycle. Figure 7-5 shows the timing of
CPU read write in type 2 and the access cycle is 3-cycle access, figure 7-6 shows the timing of CPU
read write in type 2 and the access cycle is 2-cycle access.
Fig. 7-5 Read and Write Timing in Host I/F Type 2, 3-Cycle Access.
DI[15:0]
A[3:1]
D[15:0]
XBE[1:0]
XRWN
XCSN
XRDYN
DO[15:0]
XASN
HCKI
Read cycle
Write cycle
Fig. 7-6 Read and Write Timing in Host I/F Type 2, 2-Cycle Access.
A[3:1]
D[15:0]
XBE[1:0]
XRWN
XCSN
XRDYN
DO[15:0]
DI[15:0]
XASN
HCKI
Read cycle
Write cycle
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