參數(shù)資料
型號(hào)： HB28A896IA1
元件分類： PROM
英文描述： 448M X 16 FLASH 5V PROM CARD, XMA68
封裝： CARD-68
文件頁數(shù)： 47/47頁
文件大?。?/td> 146K
代理商： HB28A896IA1
HB28A896IA1, HB28A512IA1
9
Task File Register Specification
These registers are used for reading and writing the storage data in this disk. The decoded addresses are
shown as follows.
I/O map
-CS1
-CS0
A2
A1
A0
-IORD
-IOWR
0
1
0
Data register
0
1
0
1
Error register
Feature register
0
1
0
1
0
Sector count register
0
1
0
1
Sector number register
0
1
0
Cylinder low register
0
1
0
1
Cylinder high register
0
1
0
Device head register
0
1
Status register
Command register
1
0
1
0
Alt. status register
Device control register
1. Data register: This register is a 16-bit register that has read/write ability, and it is used for transferring 1
sector data between the disk and the host. This register can be accessed in word mode and byte mode.
bit15 bit14 bit13 bit12 bit11 bit10 bit9
bit8
bit7
bit6
bit5
bit4
bit3
bit2
bit1
bit0
D15 to D0
2. Error register: This register is a read only register, and it is used for analyzing the error content at the
disk accessing. This register is valid when the BSY bit in Status register and Alternate Status register are set
to "0" (Ready).
bit7
bit6
bit5
bit4
bit3
bit2
bit1
bit0
ICRC
UNC
0
IDNF
0
ABRT
0
bit
Name
Function
7
ICRC (Interface CRC error)
This bit is set to one when an interface CRC error has occured
during an Ultra DMA data transfer. The content of this bit is not
applicable for Multiword DMA data transfer.
6
UNC (Data ECC error)
This bit is set when Uncorrectable error is occurred at reading the
disk.
4
IDNF (ID Not Found)
The requested sector cannot be found.
2
ABRT (ABoRTed command)
This bit is set if the command has been aborted because of the disk
status condition. (Not ready, Write fault, Invalid command, etc.)
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