NCT6627UD Nuvoton Technology Corporation of America, NCT6627UD Datasheet - Page 115

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

Specifications of NCT6627UD

• Lead Free Status / Rohs Status: Supplier Unconfirmed

This register is used to assign a particular drive number to the tape drive support mode of the data separator. This
register also holds the media ID, drive type, and floppy boot drive information for the floppy disk drive.
In normal floppy mode, this register only has bits 0 and 1, and the bit definitions are as follows:
If the three-mode FDD function is enabled (EN3MODE = 1 in LD0 CRF0, Bit 0), the bit definitions are as follows:
DEFAULT
DEFAULT
9.2.4 Tape Drive Register (TD Register) (Read base address + 3)
NAME
NAME
BIT
BIT
7-5
1-0
7-2
NAME
BIT
4
3
2
BIT
1
0
BIT
Reserved.
MOTOR ENABLE A. A logical 1 enables Motor A.
DMA & INT ENABLE. A logical 1 enables DRQ/IRQ.
FDC RESET. Floppy Disk Controller Reset. A logical 0 resets the FDC.
DRIVE SELECT.
Bits
1 0
0 0: Select Drive A.
0 1: Select Drive B.
1 0: Select Drive C.
1 1: Select Drive D.
RESERVED.
Tape sel 1.
Tape sel 0.
Media ID1
NA
7
0
7
7
RESERVED
Media ID0
NA
6
0
6
6
Type ID1
NA
Drive
5
0
5
5
RESERVED
ENABLE A
MOTOR
Type ID0
DESCRIPTION
DESCRIPTION
Drive
NA
4
0
4
4
DMA&INT
ENABLE
Floppy
Drive 1
Boot
-106-
NA
3
0
3
3
W83627UHG/NCT6627UD
RESET
Drive 0
Floppy
FDC
Boot
NA
2
0
Publication Release Date: October 26, 2010
2
2
Tape sel 1
Tape Sel
1
0
DRIVE SELECT
1
0
1
1
Tape sel 0
Tape Sel
0
0
0
0
0
0
Revision 1.7