 |
Electronic Components Datasheet Search |
|
|
Electronic Components Datasheet Search |
|
SMC032BF Datasheet(PDF) 67 Page - Numonyx B.V |
|
|
|||||||||||||||||||||||||||||
SMC032BF Datasheet(HTML) 67 Page - Numonyx B.V |
|
|
67 / 91 page  SMCxxxBF CF-ATA command description 67/91 10.10 Read DMA (C8h) This command uses Multi-Word DMA mode to read from 1 to 256 sectors as specified in the Sector Count register. If the sector count is set to ‘0’, 256 sectors will be read by issuing a Read DMA command. Data transfer begins at the sector specified in the Sector Number Register. When the Read DMA command is issued, the CompactFlash Card asserts BSY, and transfers all or part of the sector data in the buffer. The Card can then set DRQ and clear BSY, although it is not required. The Card asserts DMARQ when data are available to be transferred. The host then reads the 512*sector-count Bytes of data from the Card using DMA protocol. When DMARQ is asserted, the host asserts -DMACK to notify it is ready to transfer data, and asserts -IORD once for each 16 bit Word to be transferred. Interrupts are not generated for each sector transfer, but when all sectors have been transferred or when an error occurred during the operation. An Abort error is returned by the Card when a Read DMA command is sent by the host and the 8-bit transfer mode has been enabled by the Set Features command. Table 60 defines the Read DMA command Byte sequence. Table 60. Read DMA Bit 7 6 5432 1 0 Command (7) C8h C/D/H (6) LBA Drive Head (LBA 27-24) Cyl High (5) Cylinder High (LBA 23-16) Cyl Low (4) Cylinder Low (LBA 15-8) Sect Num (3) Sector Number (LBA 7-0) Sect Cnt (2) Sector Count Feature (1) X |
|
Link URL |
| Does ALLDATASHEET help your business so far? [ DONATE ] |
About Alldatasheet | Advertisement | Contact us | Privacy Policy | Link to Datasheet | Link Exchange | Manufacturer List All Rights Reserved©Alldatasheet.com |
| Russian : Alldatasheetru.com | Korean : Alldatasheet.co.kr | Spanish : Alldatasheet.es | French : Alldatasheet.fr | Italian : Alldatasheetit.com Portuguese : Alldatasheetpt.com | Polish : Alldatasheet.pl | Vietnamese : Alldatasheet.vn Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
|
Family Site : ic2ic.com |
icmetro.com |
English ▼
English
Chinese
German
Japanese
Russian
Korean
Spanish
French
Italian
Portuguese
Polish
Vietnamese
Indian
Mexican
British
New Zealand
