TRS Star CompactFlash Card Industrial-Grade Datasheet

Industrial-Grade CompactFlash CardTRS Star SpecificationFor more information visit us under:http://www.trs-star.com5.1.26 Write DMA Command – CAh, CBhThe Write DMA command in Table 5.1.26 executes in a similar manner to WRITE SECTOR(S) exceptfor the following:• The host initialised the DMA channel prior to issuing the command.• Data transfers are qualified by DMARQ and are performed by the DMA channel.• The device issues only one interrupt per command to indicate that data transfer hasterminated and status is available.During the execution of a Write DMA command, the device provides status of the BSY bit or the DRQbit until the command is completed.Table 5.1.26 Write DMACommand (7)Bit -> 7 6 5 4 3 2 1 0CAh or CBhC/D/H (6) 1 LBA 1 Drive Head (LBA 27-24)Cyl High (5) Cylinder High (LBA 23-16)Cyl Low (4) Cylinder Low (LBA 15-8)Sec Num (2) Sector Number (LBA 7-0)See Cnt (1)Feature (1)Sector CountX5.1.27 Write Long Sector – 32h, 33hThe Write Multiple command in Table 5.1.27 is provided for compatibility purposes and is similar to theWrite Sector(s) command except that it writes 516 bytes instead of 512 bytes. Only single sector WriteLong operations are supported. The transfer consists of 512 bytes of data transferred in word modefollowed by 4 bytes of ECC transferred in byte mode. Because of the unique nature of the solid-statecard, the four bytes of ECC transferred by the host cannot be used by the card. The card discardsthese four bytes and writes the sector with valid ECC fields. This command has the same protocol asthe Write Sector(s) command.Table 5.1.27 Write Long SectorCommand (7)Bit -> 7 6 5 4 3 2 1 032h or 33hC/D/H (6) 1 LBA 1 Drive Head (LBA 27-24)Cyl High (5) Cylinder High (LBA 23-16)Cyl Low (4) Cylinder Low (LBA 15-8)Sec Num (2) Sector Number (LBA 7-0)See Cnt (1)Feature (1)XXTRS* Tele-Radio-Space GmbH, reserves the right Page 75 from 113 Industrial-Grade CompactFlash Cardto change products or specifications without notice. Rev. 1.4 Stand 06/2006