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

9.3.5
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
DEFAULT
BIT
NAME
NAME
7
6
5
4
3
2
1
0
BIT
BIT
TAPE SEL 1
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.
Main Status Register (MS Register) (Read base address + 4)
0
0
1
1
Media ID1
RQM
7
0
7
0
Media ID0
DIO
NA
6
0
6
Non-DMA
Type ID1
TAPE SEL 0
mode
Drive
NA
5
1
5
0
1
0
1
FDC Busy
Type ID0
-102-
DESCRIPTION
Drive
NA
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.
Drive 1
Floppy
FDD 3
Busy
Boot
NA
3
0
3
DRIVE SELECTED
Floppy
Drive 0
FDD 2
Busy
Boot
NA
2
0
2
None
W83627UHG
1
2
3
Tape Sel
FDD 1
Busy
NA
1
0
1
1
Tape Sel
FDD 0
Busy
NA
0
0
0
0