w83l517g Winbond Electronics Corp America, w83l517g Datasheet - Page 43
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w83l517g
Manufacturer Part Number
w83l517g
Description
Winbond Lpc I/o For Notebook W83l517d/ W83l517d-f
Manufacturer
Winbond Electronics Corp America
Datasheet
1.W83L517G.pdf
(133 pages)
- Current page: 43 of 133
- Download datasheet (864Kb)
6.2.8
The Digital Input Register is an 8-bit read-only register used for diagnostic purposes. In a PC/XT or AT
only Bit 7 is checked by the BIOS. When the register is read, Bit 7 shows the complement of
DSKCHG#
In the PS/2 mode, the bit definitions are as follows:
DSKCHG (Bit 7):
This bit indicates the complement of the DSKCHG# input.
Bit 6-3: These bits are always a logic 1 during a read.
DRATE1 DRATE0 (Bit 2, 1):
These two bits select the data rate of the FDC. Refer to the DR register bits 1 and 0 for the settings
corresponding to the individual data rates.
HIGH DENS# (Bit 0):
0
1
In the PS/2 Model 30 mode, the bit definitions are as follows:
500 KB/S or 1 MB/S data rate (high density FDD)
250 KB/S or 300 KB/S data rate
Digital Input Register (DI Register) (Read base address + 7)
,
while other bits of the data bus remain in tri-state. Bit definitions are as follows:
7
x
6
x
5
7
x
4
1
6
x
3
1
5
x
x
2
1
Reserved for the hard disk controller
During a read of this register, these bits are in tri-stat
4
x
1
1
3
x
0
- 43 -
2
DSKCHG
1
W83L517D/W83L517D-F
0
DRATE0
DRATE1
HIGH DENS
DSKCHG
Publication Release Date: May 23, 2005
Revision 1.0
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