SC1200UCL-266 AMD (ADVANCED MICRO DEVICES), SC1200UCL-266 Datasheet - Page 66

• Manufacturer Part Number: SC1200UCL-266
• Manufacturer: AMD (ADVANCED MICRO DEVICES)

Specifications of SC1200UCL-266

• Lead Free Status / Rohs Status: Not Compliant

3.4.16
66
Signal Name
PWRBTN#
PWRCNT1
PWRCNT2
THRM#
Power Management Interface Signals (Continued)
Ball No.
32579B
AH5
AK6
AL7
AK4
Type
O
O
I
I
Description
Power Button. An input used by the power management
logic to monitor external system events, most typically a
system on/off button or switch.
The signal has an internal pull-up of 100 KΩ, a Schmitt-
trigger input buffer and programmable debounce protec-
tion (F1BAR1+I/O Offset 07h[0]) of at least 16 ms.
ACPI is non-functional and all ACPI outputs are unde-
fined when the power-up sequence does not include
using the power button. SUSP# is an internal signal gen-
erated from the ACPI block. Without an ACPI reset,
SUSP# can be permanently asserted. If the USE_SUSP
bit in CCR2 of GX1 module is enabled (Index C2h[7] = 1),
the CPU will stop.
If ACPI functionality is desired, or the situation described
above avoided, the power button must be toggled. This
can be done externally or internally. GPIO63 is internally
connected to PWRBTN#. To toggle the power button with
software, GPIO63 must be programmed as an output
using the normal GPIO programming protocol (see Sec-
tion 6.4.1.1 "GPIO Support Registers" on page 224).
GPIO63 must be pulsed low for at least 16 ms and not
more than 4 sec.
Asserting POR# has no effect on ACPI. If POR# is
asserted and ACPI was active prior to POR#, then ACPI
will remain active after POR#. Therefore, BIOS must
ensure that ACPI is inactive before GPIO63 is pulsed
low.
Suspend Power Plane Control 1 and 2. Control signal
asserted during power management Suspend states.
These signals are open-drain outputs.
Thermal Event. Active low signal generated by external
hardware indicating that the system temperature is too
high.
AMD Geode™ SC1200/SC1201 Processor Data Book
Signal Definitions
Mux
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