up events. Note: The status bit gets set if the
wakeup event occurs, whether or not it is
enabled as a wakeup function by setting the
corresponding bit in Soft Power Enable Register
1. However, only the enabled wakeup functions
will turn on power to the system.
REGISTERS
The following registers can be accessed when in
configuration mode at Logical Device 8,
Registers B0-B3, B8 and F4, and when not in
configuration they can be accessed through the
Index and Data Register.
Soft Power Status Register 2
(Configuration Register B3, Logical Device 8)
This register contains additional status for the
wake-up events. Note: The status bit gets set if
the wakeup event occurs, whether or not it is
enabled as a wakeup function by setting the
corresponding bit in Soft Power Enable Register
2. However, only the enabled wakeup functions
will turn on power to the system.
Soft Power Enable Registers
Soft Power Enable Register 1
(Configuration Register B0, Logical Device 8)
This register contains the enable bits for the
wake-up function of the nPowerOn bit. When
enabled, these bits allow their corresponding
function to turn on power to the system.
Soft Power Control Registers
Soft Power Enable Register 2
(Configuration Register B1, Logical Device 8)
This register contains additional enable bits for
the wake-up function of the nPowerOn bit.
When enabled, these bits allow their
corresponding function to turn on power to the
system. It also contains OFF_EN: After power
up, this bit defaults to 1, i.e., enabled. This bit
allows the software to enable or disable the
button control of power off.
WDT_CTRL
(Configuration Register F4, Logical Device 8)
This register is used for Soft Power
Management and Watchdog Timer control.
Bits[7:5] are for soft power management:
SPOFF, Restart_Cnt, Stop_Cnt.
Delay 2 Time Set Register
(Configuration Register B8, Logical Device 8)
This register is used to set Delay 2 to value from
500msec to 32sec. The default value is
500msec.
Soft Power Status Registers
Soft Power Status Register 1
(Configuration Register B2, Logical Device 8)
This register contains the status for the wake-
161
SMSC [ SMSC CORPORATION ]
