NCT6627UD Nuvoton Technology Corporation of America, NCT6627UD Datasheet - Page 113

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

Specifications of NCT6627UD

• Lead Free Status / Rohs Status: Supplier Unconfirmed

In PS/2 Model 30 mode, the bit definitions for this register are as follows:
Along with the SA register, the SB register is used to monitor several disk interface pins in PS/2 and Model 30
modes. In PS/2 mode, the bit definitions for this register are as follows:
DEFAULT
9.2.2 Status Register B (SB Register) (Read base address + 1)
BIT
BIT
NAME
3
2
1
0
7
6
5
4
3
2
1
0
BIT
BIT
HEAD. Indicates the complement of the HEAD# output.
0: Side 0.
1: Side 1.
INDEX#. Indicates the value of the INDEX# output.
WP#.
0: The disk is write-protected.
1: The disk is not write-protected.
DIR. Indicates the direction of head movement.
0: Outward direction.
1: Inward direction.
INIT PENDING. Indicates the value of the floppy disk interrupt output.
DRQ. Indicates the value of the DRQ output pin.
SETP F/F. indicates the complement of latched STEP# output.
TRAK0. Indicates the complement of the TRAK0# input.
HEAD#. Indicates the value of the HEAD# output.
0: Side 1.
1: Side 0.
INDEX. Indicates the complement of the INDEX# output.
WP.
0: The disk is not write-protected.
1: The disk is write-protected.
DIR#. Indicates the direction of the head movement.
0: Inward direction.
1: Outward direction.
PENDING
INIT
7
7
0
DRQ
6
6
0
STEP F/F
NA
5
5
DESCRIPTION
DESCRIPTION
TRAK0
4
4
0
HEAD#
-104-
NA
3
3
W83627UHG/NCT6627UD
INDEX
Publication Release Date: October 26, 2010
2
0
2
WP
1
0
1
DIR#
NA
0
0
Revision 1.7