NCT6627UD Nuvoton Technology Corporation of America, NCT6627UD Datasheet - Page 119

• Manufacturer Part Number: NCT6627UD
• Manufacturer: Nuvoton Technology Corporation of America

Specifications of NCT6627UD

• Lead Free Status / Rohs Status: Supplier Unconfirmed

Status Register 1 (ST1)
NAME
BIT
BIT
7-6
1-0
BIT
5
4
3
2
7
6
5
4
IC Interrupt Code.
Bits
7 6
0 0: Normal termination of the command.
0 1: Abnormal termination of the command.
1 0: Invalid command issue.
1 1: Abnormal termination because the ready signal from FDD changed state during
command execution.
SE (Seek End).
1: Seek end.
0: Seek error.
EC (Equipment Check).
1: When a fault signal is received from the FDD or the track.
0: Signal fails to occur after 77 step pulses.
0: No error.
NR (Not Ready).
1: Drive is not ready.
0: Drive is ready.
HD Head Address. (The current head address)
1: Head selected.
0: Head selected.
US 1, US0 Drive Select.
Bits
1 0
0 0: Drive A selected.
0 1: Drive B selected.
1 0: Drive C selected.
1 1: Drive D selected.
EN (End of Track). 1 will be written to this bit if the FDC tries to access a sector beyond
the final sector or a cylinder.
Not Used. This bit is always 0.
DE (Data Error). 1 will be written to this bit if the FDC detects a CRC error in either the ID
field or the data field.
OR (Over Run). 1 will be written to this bit if the FDC is not served by the host system
within a certain time interval during data transfer.
EN
7
Not Used
6
OE
5
DESCRIPTION
DESCRIPTION
OR
4
Not Used
-110-
3
W83627UHG/NCT6627UD
ND
2
Publication Release Date: October 26, 2010
NW
1
MAM
0
Revision 1.7