W83627UHG Nuvoton Technology Corporation of America, W83627UHG Datasheet - Page 113

• Manufacturer Part Number: W83627UHG
• Description: IC I/O CONTROLLER 128-QFP
• Manufacturer: Nuvoton Technology Corporation of America

Specifications of W83627UHG

• Applications: PC's, PDA's
• Interface: LPC
• Voltage - Supply: 3.3V, 5V
• Package / Case: 128-XFQFN
• Mounting Type: Surface Mount
• Pin Count: 128
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

If the three-mode FDD function is enabled (EN3MODE = 1 in LD0 CRF0, Bit 0), the bit definitions are
as follows:
The Main Status Register is used to control the flow of data between the microprocessor and the
controller. The bit definitions for this register are as follows:
DEFAULT
9.2.5 Main Status Register (MS Register) (Read base address + 4)
BIT
7-2
BIT
NAME
NAME
1
0
7
6
5
4
3
2
1
0
BIT
BIT
TAPE SEL 1
RESERVED.
Tape sel 1.
Tape sel 0.
Media ID1. Read only. Reflects the value of LD0, CRF1, bit 5.
Media ID0. Read only. Reflects the value of LD0, CRF1, bit 4.
Drive Type ID1.
Drive Type ID0.
Floppy Boot Drive 1. Reflects the value of LD0, CRF1, bit 7.
Floppy Boot Drive 0. Reflects the value of LD0, CRF1, bit 6.
Tape Sel 1.
Tape Sel 0.
0
0
1
1
Media ID1
RQM
7
0
7
Media ID0
DIO
6
0
6
Non-DMA
Type ID1
TAPE SEL 0
mode
Drive
5
1
5
0
1
0
1
FDC Busy
Type ID0
DESCRIPTION
DESCRIPTION
-98-
Drive
4
1
4
Reflect the bit in LD0, CRF2. Which bit is
reflected depends on the last drive selected
in the PO register.
Assign a logical drive number to the tape
drive. Drive 0 is not available as a tape
drive and is reserved for the floppy disk
boot drive.
Floppy
Drive 1
FDD 3
Busy
Boot
3
0
3
Publication Release Date: March 24, 2008
DRIVE SELECTED
Floppy
Drive 0
FDD 2
Busy
Boot
2
0
2
None
W83627UHG
1
2
3
Tape Sel
FDD 1
Busy
1
1
0
1
Revision 1.44
Tape Sel
FDD 0
Busy
0
0
0
0