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參數資料
| 型號： | W86L388D |
| 廠商： | WINBOND ELECTRONICS CORP |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | W86L388D Winbond Host Interface SD/MMC Memory Card Bridge |
| 中文描述： | SPECIALTY MICROPROCESSOR CIRCUIT, PQFP48 |
| 封裝： | 7 X 7 MM, 1.40 MM HEIGHT, LQFP-48 |
| 文件頁數： | 14/28頁 |
| 文件大?。?/td> | 386K |
| 代理商： | W86L388D |
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W86L388D
Preliminary
Publication Release Date: August 2001
- 11 -
Revision 0.50
DMA Access:
DMA request XDRQN is used to notify the Host that the Host should write data to the transmit data
buffer or read data from the receive data buffer in data write to the card or data read from the card.
During data transmit to the card, the XDRQN will active if the data write command has been transfer
to the card and the transmit data buffer have not enough data to transmit to the card. The XDRQN will
not active if the transmit data buffer have enough data to transmit to the card.
During data receive from the card, the XDRQN will active if the data read command has been transfer
to the card and the data have been received in the receive data buffer. The XDRQN will not active if
the data read command has been executed completedly and the receive data buffer is read out.
There are two types of DMA acknowledge waveform, the first type is configured if DAKEN = low,
XDAKN is ignore and XDRQN will inactive after each access receive or transmit data buffer, the
XDRQN will re-active after four clock later. Figure 7-5 shows the waveform of DMA access receive
data buffer in DAKEN = low. The second type is configured if DAKEN = high, XDAKN is used to count
the transfer count of the data buffer, XDRQN will hold at active state until the data has been
transferred completedly. Figure 7-6 is the waveform of DMA access transmit data buffer in DAKN =
high.
Fig. 7-5 DMA Access Receive Data Buffer (DAKEN = low).
A[3:1]
D[15:0]
XRDN
XDAKN
XCSN
XDRQN
System
Clock
010
010
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PDF描述 |
|---|---|
| W86L488 | SD/ SDIO/ MMC MEMORY CARD BRIDGE |
| W86L488AY | SD/ SDIO/ MMC MEMORY CARD BRIDGE |
| W86L488Y | SD/ SDIO/ MMC MEMORY CARD BRIDGE |
| W88111AF | ATAPI CD-ROM DECODER & CONTROLLER |
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相關代理商/技術參數 |
參數描述 |
|---|---|
| W86L388-DG | 制造商:Nuvoton Technology Corp 功能描述:IC FLASH MEM CARD BRIDGE |
| W86L488 | 制造商:WINBOND 制造商全稱:Winbond 功能描述:SD/ SDIO/ MMC MEMORY CARD BRIDGE |
| W86L488AY | 制造商:WINBOND 制造商全稱:Winbond 功能描述:SD/ SDIO/ MMC MEMORY CARD BRIDGE |
| W86L488AY-SA5772001CA-REV C | 制造商:Nuvoton Technology Corp 功能描述:IC FLASH MEM CARD BRIDGE |
| W86L488AY-SA5772001DA-REV D | 制造商:Nuvoton Technology Corp 功能描述:IC FLASH MEM CARD BRIDGE |
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