w83977atf Winbond Electronics Corp America, w83977atf Datasheet - Page 173
w83977atf
Manufacturer Part Number
w83977atf
Description
Winbond I/o
Manufacturer
Winbond Electronics Corp America
Datasheet
1.W83977ATF.pdf
(207 pages)
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0
1-3
4
5
Register Location:
Default Value:
Attribute:
0-6
7
Bit
Bit
TMR_STS
Reserved
BM_STS
GBL_STS
Reserved
Reserved
WAK_STS
Name
Name
7
8 bits
6
event occurs. Upon setting this bit, the sleeping/working state machine will
transition the system to the working state. This bit is only set by hardware and
no effect. When the WAK_STS is cleared and all devices are in sleeping
state, the whole chip enters the sleeping state.
This bit is the timer carry status bit. This bit is set anytime the bit 23 of the
24-bit counter changes (whenever the MSB changes from low to high or high
to low). When TMR_EN and TMR_STS are set, a power magement event is
raised. This bit is only set by hardware and can only be cleared by writing a
1 to this bit position. Writing a 0 has no effect.
Reserved.
This is the bus master status bit. Writing a 1 to BM_CNTRL also sets
BM_STS. Writing a 1 clears this bit and also clears BM_CNTRL. Writing a
0 has no effect.
This is the global status bit.
attention of the
can only be cleared by writing a 1 to this bit position. Writing a 1 to this bit
position also clears BIOS_RLS. Writing a 0 has no effect.
Reserved. These bits always return zeros.
<
Read/write
5
4
> + 1H System I/O Space
3
2
1
-117 -
0
Description
This bit is set when the BIOS wants the
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
WAK_STS
, or by the sleeping/working state
Publication Release Date:April 1998
W83977ATF
PRELIMINARY
Revision 0.53
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