Specifications

 2012 Advanced Micro Devices, Inc.
ACPI/SMBUS Controller (bus-0, dev-20, fun-0)
AMD SP5100 Register Programming Requirements
Page 26
SATA
USB
SMBUS
PATA
AC97
HD AUDIO
LPC
PCI
For register details, refer to
the sections check-marked
in the SP5100 Register
Reference Guide.
RTC
ACPI
PM_REG
A-LINK
I/O REG
XIOAPIC
X
2.36 Unconditional Shutdown
ASIC Rev Register Settings Function/Comment
SP5100 A15 Smbus_PCI_config 0x38[12] = 1 Enable the enhancement for unconditional shutdown
Set sm cfg 43 bit 3 to 0 first before programming this bit,
then set 43h bit 3 back to 1 after programming.
SATA
USB
SMBUS
PATA
AC97
HD AUDIO
LPC
PCI
For register details, refer to
the sections check-marked
in the SP5100 Register
Reference Guide.
x
RTC
ACPI
PM_REG
A-LINK
I/O REG
XIOAPIC
2.37 Watchdog Timer Resolution
The register below should be programmed by SW before WDT is programmed.
ASIC Rev Register Settings Function/Comment
All Revs SP5100 PMIO 0x69[0] = 0
PMIO 0x69[2:1] = 01
Enable WDT function (0: Enable; 1: Disable)
00: Set resolution for 32 us
01: Set resolution for 10ms
10: Set resolution for 100ms
11: Set resolution for 1s
10ms resolution is recommended.
SATA
USB
SMBUS
PATA
AC97
HD AUDIO
LPC
PCI
For register details, refer to
the sections check-marked
in the SP5100 Register
Reference Guide.
RTC
ACPI
PM_REG
A-LINK
I/O REG
XIOAPIC
x