- 您现在的位置：买卖IC网 > Sheet目录251 > SFCF64GBH2BU4TO-I-NU-517-STD (Swissbit NA Inc)FLASH SLC UDMA/MDMA/PIO 64GB
Table 70: Read DMA
Task File Register
7
6
5
4
3
2
1
0
COMMAND
C8h
DRIVE/HEAD
CYLINDER HI
CYLINDER LOW
SECTOR NUM
SECTOR COUNT
FEATURES
LBA
D
Cylinder High (LBA23:16)
Cylinder Low (LBA15:8)
Sector Number (LBA7:0)
Sector Count
nu
Head (LBA 27:24)
10.15 Read DMA Ext (25h) 48bit LBA
This command uses DMA mode to read from 1 to 65536 sectors as specified in the Sector Count Register. A sector
count of 0 requests 65536 sectors. The transfer begins at the sector specified in the Sector Number Register. When
this command is issued the CompactFlash TM Storage Card sets BSY, puts all or part of the sector of data in the
buffer. The Card is then permitted, although not required, to set DRQ, clear BSY. The Card asserts DMARQ while
data is available to be transferred. The Card asserts DMARQ while data is available to be transferred. The host then
reads the (512 * sector-count) bytes of data from the Card using DMA. While DMARQ is asserted by the Card, the
Host asserts -DMACK while it is ready to transfer data by DMA and asserts -IORD once for each 16 bit word to be
transferred to the Host.
Interrupts are not generated on every sector, but upon completion of the transfer of the entire number of sectors
to be transferred or upon the occurrence of an unrecoverable error.
At command completion, the Command Block Registers contain the LBA of the last sector read. If an error occurs,
the read terminates at the sector where the error occurred. The Command Block Registers contain the LBA of the
sector where the error occurred. The amount of data transferred is indeterminate.
When a Read DMA Ext command is received by the Card and 8 bit transfer mode has been enabled by the Set
Features command, the Card shall return the Aborted error.
Table 71: Read DMA Ext
register write
previous
current
Task File Register
15:8
7
6
5
4
3
2
1
0
COMMAND
-
25h
DRIVE/HEAD
-
1
1
1
Drive
Reserved
LBA High
LBA Mid
LBA Low
SECTOR COUNT
FEATURES
LBA (47:40)
LBA (39:32)
LBA (31:24)
15:8
nu
LBA (23:16)
LBA (15:8)
LBA (7:0)
7:0
nu
10.16 Read Multiple (C4h)
The Read Multiple command performs similarly to the Read Sectors command. Interrupts are not generated on
every sector, but on the transfer of a block which contains the number of sectors defined by a Set Multiple
command.
Command execution is identical to the Read Sectors operation except that the number of sectors defined by a Set
Multiple command is transferred without intervening interrupts. DRQ qualification of the transfer is required only
at the start of the data block, not on each sector.
The block count of sectors to be transferred without intervening interrupts is programmed by the Set Multiple
Mode command, which must be executed prior to the Read Multiple command. When the Read Multiple
command is issued, the Sector Count Register contains the number of sectors (not the number of blocks or the
block count) requested. If the number of requested sectors is not evenly divisible by the block count, as many full
blocks as possible are transferred, followed by a final, partial block transfer. The partial block transfer is for n
sectors, where:
n = (sector count) module (block count).
If the Read Multiple command is attempted before the Set Multiple Mode command has been executed or when
Read Multiple commands are disabled, the Read Multiple operation is rejected with an Aborted Command error.
Disk errors encountered during Read Multiple commands are posted at the beginning of the block or partial block
transfer, but DRQ is still set and the data transfer will take place as it normally would, including transfer of
corrupted data, if any.
Interrupts are generated when DRQ is set at the beginning of each block or partial block. The error reporting is the
same as that on a Read Sector(s) Command. This command reads from 1 to 256 sectors as specified in the Sector
Swissbit AG
Industriestrasse 4
Swissbit reserves the right to change products or specifications without notice.
Revision: 1.00
CH-9552 Bronschhofen
Switzerland
www.swissbit.com
industrial@swissbit.com
C-440_data_sheet_CF-HxBU_Rev100.doc
Page 72 of 102
发布紧急采购，3分钟左右您将得到回复。
相关PDF资料
SFN08B4702CBQLF7
RES ARRAY 47K OHM 7 RES 8-DFN
SFP1050-12BG
FRONT END AC/DC 1050W 12V
SFP450-12BG
PWR SUP 450W 12V 36.6A W/STANDBY
SFSD1024N1BN1TO-I-DF-151-STD
FLASH MICRO SD CARD IND S-200 1G
SFSD2048L1BN2TO-I-DF-151-STD
FLASH SECURE DGTL CARD SD 2G
SFSD4096L1BN2TO-I-Q2-141-STD
FLASH SECURE DGTL CARD SDHC 4G
SFSD8192N1BW1MT-E-QG-111-STD
FLASH MICRO SD 8GB EXT TEMP
SFUI4096J1BP2TO-I-DT-211-STD
FLASH DRIVE USB MODULE U-110 4G
相关代理商/技术参数
SFCF64GBH2BU4TO-I-NU-527-STD
制造商:SWISSBIT 功能描述:CFC C-440 DENSITY INDUSTRIAL - Trays 制造商:SWISSBIT NA INC 功能描述:FLASH CARD 64GB IND C-440 制造商:Swissbit 功能描述:Memory Cards 64GB IND COMPACT FLASH SLC NAND C440
SFCF8192H1BO2TO-C-Q1-523-SMA
制造商:SWISSBIT NA INC 功能描述:FLASH
SFCF8192H1BO2TO-C-Q1-533-ZP1
制造商:SWISSBIT NA INC 功能描述:FLASH
SFCF8192H1BO2TO-C-Q1-543-SMA
制造商:SWISSBIT NA INC 功能描述:FLASH
SFCF8192H1BO2TOIQ1523SMA
制造商:Swissbit 功能描述:Flash Card 8G-Byte 3.3V/5V CompactFlash 50-Pin
SFCF8192H1BO2TO-I-Q1-523-SMA
功能描述:FLASH SLC UDMA/MDMA/PIO 8G RoHS:是 类别:存储卡，模块 >> 存储器，PC 卡 系列:C-320 标准包装:30 系列:- 存储容量:8GB 存储器类型:存储卡 - Extreme III SD?
SFCF8192H1BO2TO-I-Q1-533-ZP1
制造商:SWISSBIT NA INC 功能描述:FLASH
SFCF8192H1BO2TO-I-Q1-543-SMA
制造商:SWISSBIT NA INC 功能描述:FLASH