
9,$7HFKQRORJLHV,QF
VT82C586B
Revision 1.0
May 13, 1997
-
49-
Register Descriptions
General Purpose Power Management Registers
Offset 21-20 - General Purpose Status (GP_STS) ....... RWC
15-10 Reserved
........................................ always reads 0
9
USB Resume Status (USB_STS)
This bit is set when a USB peripheral generates a
resume event.
8
Ring Status (RI_STS)
This bit is set when the RI# input is asserted low.
7
EXTSMI7 Toggle Status (EXT7_STS)
This bit is set when the EXTSMI7# pin is toggled.
6
EXTSMI6 Toggle Status (EXT6_STS)
This bit is set when the EXTSMI6# pin is toggled.
5
EXTSMI5 Toggle Status (EXT5_STS)
This bit is set when the EXTSMI5# pin is toggled.
4
EXTSMI4 Toggle Status (EXT4_STS)
This bit is set when the EXTSMI4# pin is toggled.
3
EXTSMI3 Toggle Status (EXT3_STS)
This bit is set when the EXTSMI3# pin is toggled.
2
EXTSMI2 Toggle Status (EXT2_STS)
This bit is set when the EXTSMI2# pin is toggled.
1
EXTSMI1 Toggle Status (EXT1_STS)
This bit is set when the EXTSMI1# pin is toggled.
0
EXTSMI0 Toggle Status (EXT0_STS)
This bit is set when the EXTSMI0# pin is toggled.
Note that the above bits correspond one for one with the bits
of the General Purpose SCI Enable and General Purpose SMI
Enable registers at offsets 22 and 24: an SCI or SMI is
generated if the corresponding bit of the General Purpose SCI
or SMI Enable registers, respectively, is set to one.
The above bits are set by hardware only and can only be
cleared by writing a one to the desired bit.
Offset 23-22 - General Purpose SCI Enable ................... RW
15-10 Reserved
........................................always reads 0
9
Enable SCI on setting of the USB_STS bit
....def=0
8
Enable SCI on setting of the RI_STS bit
.......def=0
7
Enable SCI on setting of the EXT7_STS bit
..def=0
6
Enable SCI on setting of the EXT6_STS bit
..def=0
5
Enable SCI on setting of the EXT5_STS bit
..def=0
4
Enable SCI on setting of the EXT4_STS bit
..def=0
3
Enable SCI on setting of the EXT3_STS bit
..def=0
2
Enable SCI on setting of the EXT2_STS bit
..def=0
1
Enable SCI on setting of the EXT1_STS bit
..def=0
0
Enable SCI on setting of the EXT0_STS bit
..def=0
These bits allow generation of an SCI using a separate set of
conditions from those used for generating an SMI.
Offset 25-24 - General Purpose SMI Enable .................. RW
15-10 Reserved
........................................always reads 0
9
Enable SMI on setting of the USB_STS bit
...def=0
8
Enable SMI on setting of the RI_STS bit
......def=0
7
Enable SMI on setting of the EXT7_STS bit
..def=0
6
Enable SMI on setting of the EXT6_STS bit
..def=0
5
Enable SMI on setting of the EXT5_STS bit
..def=0
4
Enable SMI on setting of the EXT4_STS bit
..def=0
3
Enable SMI on setting of the EXT3_STS bit
..def=0
2
Enable SMI on setting of the EXT2_STS bit
..def=0
1
Enable SMI on setting of the EXT1_STS bit
..def=0
0
Enable SMI on setting of the EXT0_STS bit
..def=0
These bits allow generation of an SMI using a separate set of
conditions from those used for generating an SCI.
Offset 27-26 - Power Supply Control .............................. RW
15-11 Reserved
........................................always reads 0
10
Ring PS Control (RI_PS_CTL)
......................def=0
This bit enables the setting of the RI_STS bit to turn
on the VDD_5V power plane by setting PWRON = 1.
9
Power Button Control (PB_CTL)
..................def=1
This bit is used to control the setting of the PB_STS
bit to resume the system from suspend (turn on the
VDD_5V power plane by setting PWRON = 1).
8
RTC PS Control (RTC_PS_CTL)
..................def=0
This bit enables the setting of the RTC_STS bit to
resume the system from suspend (turn on the
VDD_5V power plane by setting PWRON = 1).
7-1
Reserved
........................................always reads 0
0
EXTSMI0 Toggle PS Control (E0_PS_CTL)
def=0
This bit enables the setting of the EXT0_STS bit to
resume the system from suspend (turn on the
VDD_5V power plane by setting PWRON = 1).