W83877TF Datasheet, PDF (143/154 Pages) Winbond – I/O chip disk drive adapter

W83877TF
8.4.2 Power Management 1 Status Register 2 (PM1STS2)
Register Location:
<CR33>+1H System I/O Space
Default Value:
00h
Attribute:
Read/write
Size:
8 bits
765
43
21
0
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
WAK_STS
Bit
Name
0-6 Reserved
7
WAK_STS
Description
Reserved.
This bit is set when the system is in the sleeping state and an enabled resume
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
is cleared by software writing a 1 to this bit position or by the sleeping/working
state machine automatically upon the global standby timer expires. Writing a
0 has no effect. Once the WAK_STS is cleared and all devices have been in
sleeping state, the whole chip enters the sleeping state.
8.4.3 Power Management 1 Enable Register 1(PM1EN1)
Register Location:
<CR33>+2H System I/O Space
Default Value:
00h
Attribute:
Read/write
Size:
8 bits
765
43
21
0
TMR_EN
Reserved
Reserved
Reserved
GBL_EN
Reserved
Reserved
Reserved
- 117 -
Publication Release Date: March 1998
Version 0.61