W83977A Winbond Electronics Corp America, W83977A Datasheet - Page 37
W83977A
Manufacturer Part Number
W83977A
Description
Winbond I/O
Manufacturer
Winbond Electronics Corp America
Datasheet
1.W83977A.pdf
(160 pages)
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
W83977AG-A
Manufacturer:
Nuvoton Technology Corporation of America
Quantity:
10 000
Company:
Part Number:
W83977ATF-AW
Manufacturer:
Winbond
Quantity:
8
Company:
Part Number:
W83977ATF-AW
Manufacturer:
MIT
Quantity:
1 000
Company:
Part Number:
W83977ATG-AW
Manufacturer:
Nuvoton Technology Corporation of America
Quantity:
10 000
- Current page: 37 of 160
- Download datasheet (556Kb)
2.2 Register Descriptions
There are several status, data, and control registers in W83977TF. These registers are defined below:
2.2.1 Status Register A (SA Register) (Read base address + 0)
This 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:
INIT PENDING (Bit 7):
This bit indicates the value of the floppy disk interrupt output.
0
1
STEP (Bit 5):
This bit indicates the complement of STEP output.
This bit indicates the value of TRAK0 input.
HEAD (Bit 3):
DRV 2 (Bit 6):
TRAK0 (Bit 4):
A second drive has been installed
A second drive has not been installed
base address + 0
base address + 1
base address + 2
base address + 3
base address + 4
base address + 5
base address + 7
ADDRESS
OFFSET
7
6
5
DT (FIFO) REGISTER
4
SB REGISTER
TD REGISTER
MS REGISTER
SA REGISTER
DI REGISTER
3
READ
-29 -
2
1
0
REGISTER
DIR
INDEX
WP
HEAD
TRAK0
STEP
INIT PENDING
DRV2
Publication Release Date: April 1998
DT (FIFO) REGISTER
DO REGISTER
DR REGISTER
CC REGISTER
TD REGISTER
W83977TF
WRITE
PRELIMINARY
Revision 0.62
Related parts for W83977A
Image
Part Number
Description
Manufacturer
Datasheet
Request
R
Part Number:
Description:
Winbond H/w Monitoring Ic
Manufacturer:
Winbond Electronics Corp America
Datasheet:
Part Number:
Description:
Winbond Lpc I/o
Manufacturer:
Winbond Electronics Corp America
Datasheet:
Part Number:
Description:
Winbond Smbus Gpi/o
Manufacturer:
Winbond Electronics Corp America
Datasheet:
Part Number:
Description:
Winbond I/o
Manufacturer:
Winbond Electronics Corp America
Datasheet:
Part Number:
Description:
Winbond Clock Generator For Intel P4 Springdale Series Chipset
Manufacturer:
Winbond Electronics Corp America
Datasheet:
Part Number:
Description:
Winbond Clock Generator For Intel P4 Springdale Series Chipset
Manufacturer:
Winbond Electronics Corp America
Datasheet:
Part Number:
Description:
Winbond Clock Generator For Intel P4 Springdale Series Chipset P4 Springdale Series Chipset
Manufacturer:
Winbond Electronics Corp America
Datasheet:
Part Number:
Description:
Winbond Clock Generator For Intel P4 845 Series Chipset
Manufacturer:
Winbond Electronics Corp America
Datasheet:
Part Number:
Description:
Winbond Clock Generator For Via P4/kt Series Chipset
Manufacturer:
Winbond Electronics Corp America
Datasheet:
Part Number:
Description:
Winbond Clock Generator For Intel 915/925 Chipsets
Manufacturer:
Winbond Electronics Corp America
Datasheet:
Part Number:
Description:
Winbond H/w Monitoring Ic
Manufacturer:
Winbond Electronics Corp America
Datasheet:
Part Number:
Description:
Winbond Lpc I/o
Manufacturer:
Winbond Electronics Corp America
Datasheet:
Part Number:
Description:
Winbond Smbus Gpi/o
Manufacturer:
Winbond Electronics Corp America
Datasheet:
Part Number:
Description:
Winbond I/o
Manufacturer:
Winbond Electronics Corp America
Datasheet:
Part Number:
Description:
Pa-risc Embedded Controller
Manufacturer:
Winbond Electronics Corp America
Datasheet: