FDC37B782-NS Standard Microsystems (SMSC), FDC37B782-NS Datasheet - Page 157

• Manufacturer Part Number: FDC37B782-NS
• Manufacturer: Standard Microsystems (SMSC)

Specifications of FDC37B782-NS

• Lead Free Status / RoHS Status: Supplier Unconfirmed

Power Management 1 Control Register 2 (PM1_CNTRL 2)
Register Location: <PM1_BLK>+5 System I/O Space
Default Value: 00h on Vbat POR
Attribute: Read/Write (Note 0)
Size: 8-bits
BIT
2-4
6-7
BIT
0
1
5
1-7
Reserved
PWRBTNOR_EN
SLP_TYPx
SLP_EN
Reserved
Reserved
NAME
NAME
generate an SCI interrupt. When this bit is reset power management events
will not generate an SCI interrupt.
Reserved. These bits always return a value of zero.
Reserved. This field always returns zero.
This bit controls the power button over-ride function. When set, then
anytime the Button_In signal is asserted for more than four seconds the
system will transition to the off state. When a power button over-ride
event occurs, the logic should clear the PWRBTN_STS bit, and set the
PWRBTNOR_STS bit.
This 3-bit field defines the type of hardware sleep state the system
enters when the SLP_EN bit is set to one. When this field is 000 the
FDC37B78x will transition the machine to the off state when the
SLP_EN bit is set to one. That is, with this field set to 000, nPowerOn
will go inactive (float) after a 1-2 RTC clock delay when SLP_EN is set.
This delay is a minimum of one 32kHz clock and a maximum of two
32kHz clocks (31.25μsec-62.5μsec). When this field is any other value,
there is no effect.
This is a write-only bit and reads to it always return a zero. Writing ‘1’ to
this bit causes the system to sequence into the sleeping state
associated with the SLP_TYPx fields after a 1-2 RTC clock delay, if the
SLP_CTRL bit in the sleep / wake configuration register (0xF0 in
Logical Device A) is cleared. If the SLP_CTRL bit is set, do not
sequence into the sleeping state associated with the SLP_TYPx field,
but generate an SMI. Note: the SLP_EN_SMI bit in the SMI Status
Register 2 is always set upon writing ‘1’ to the SLP_EN bit. Writing ‘0’
to this bit has no effect.
Reserved. This field always returns zero.
159
DESCRIPTION
DESCRIPTION