MD1050-DCC M-Systems Inc., MD1050-DCC Datasheet - Page 17

• Manufacturer Part Number: MD1050-DCC
• Description: Diskonchip Ide Pro Data Sheet
• Manufacturer: M-Systems Inc.

4.10 Data Register (Read/Write)
The Data register is a 16-bit register used to transfer data blocks between the device’s data buffer
and the host. This register can be written or the content is valid on read when DRQ=1.
4.11 Alternate Status Register (Read)
This register contains the device status. The contents of this register are updated to reflect the
current state of the device and the progress of any command being executed by the device. The
contents of this register, except for BSY, is ignored when BSY=1. BSY is valid at all times. The
contents of the register and all other Command Block registers are not valid while a device is in
Sleep mode.
See Section 4.1 for the bit descriptions.
4.12 Device Control Register (Write)
This register allows a host to software reset attached devices and to enable or disable the assertion
of the INTRQ signal by a selected device. This register can only be written when DMACK# is not
asserted.
16
Bit No.
Bit 15
3-7
Bit 7
Bit 7
Bit 7
BSY
D15
0
1
2
D7
Reserved
Reserved. Clear this bit to 0.
#IEN (Interrupt Enable).
0 = Enables interrupts to the host (using the #IREQ tri-state pin).
1 = Disables all pending interrupts (#IREQ in high-Z).
SRST (Soft Reset). This is the host software reset bit.
Reserved.
DRDY
Bit 14
Bit 6
Bit 6
Bit 6
D14
D6
Bit 13
Bit 5
Bit 5
Bit 5
D13
D5
DF
DiskOnChip IDE Pro Data Sheet, Rev. 1.5
SRST
Bit 12
Bit 4
Bit 4
Bit 4
DSC
D12
D4
Description
Bit 11
DRQ
Bit 3
Bit 3
Bit 3
D11
D3
#IEN
CORR
Bit 10
Bit 2
Bit 2
Bit 2
D10
D2
Bit 9
Bit 1
Bit 1
Bit 1
IDX
D1
D9
Reserved
91-SR-012-01-8L
Bit 8
Bit 0
Bit 0
Bit 0
ERR
D8
D0