w83977ag Winbond Electronics Corp America, w83977ag Datasheet - Page 40
![no-image](/images/no-image-200.jpg)
w83977ag
Manufacturer Part Number
w83977ag
Description
W83977f With 3rd Uart For Ir, Pb-free
Manufacturer
Winbond Electronics Corp America
Datasheet
1.W83977AG.pdf
(182 pages)
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
w83977ag-A
Manufacturer:
Nuvoton Technology Corporation of America
Quantity:
10 000
- Current page: 40 of 182
- Download datasheet (2Mb)
If three mode FDD function is enabled (EN3MODE = 1 in Logical Device 0 CRF0 bit:0), the bit
definitions are as follows:
Media ID1 Media ID0 (Bit 7, 6):
These two bits are read only. These two bits reflect the value of Logical Device 0 CRF1 bit 4,5.
Drive type ID1 Drive type ID0 (Bit 5, 4):
These two bits reflect two of the bits of Logical Device 0 CRF2. Which two bits are reflected depends
on the last drive selected in the DO REGISTER.
Floppy Boot drive 1, 0 (Bit 3, 2):
These two bits reflect the value of Logical Device 0 CRF1 bit 7,6.
Tape Sel 1, Tape Sel 0 (Bit 1, 0):
These two bits assign a logical drive number to the tape drive. Drive 0 is not available as a tape drive
and is reserved as the floppy disk boot drive.
W83977F-A/ W83977G-A/ W83977AF-A/ W83977AG-A
TAPE SEL 1
0
0
1
1
7
6
X
7
X
5
6
TAPE SEL 0
5
X
4
0
1
0
1
X
4
3
X
3
2
-32
X
2
1
1
0
0
Tape Sel 0
Tape Sel 1
Floppy boot drive 0
Floppy boot drive 1
Drive type ID0
Drive type ID1
Media ID0
Media ID1
Tape sel 1
Tape sel 0
DRIVE SELECTED
None
1
2
3
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