AMD-K6-IIIE+550ACR AMD (ADVANCED MICRO DEVICES), AMD-K6-IIIE+550ACR Datasheet - Page 166

• Manufacturer Part Number: AMD-K6-IIIE+550ACR
• Manufacturer: AMD (ADVANCED MICRO DEVICES)

Specifications of AMD-K6-IIIE+550ACR

• Lead Free Status / RoHS Status: Not Compliant

AMD-K6™-IIIE+ Embedded Processor Data Sheet
Enhanced Power
Management Register
(EPMR)
Figure 54. Enhanced Power Management Register (EPMR)
144
Symbol
63
IOBASE
GSBC
EN
Description
I/O Base Address
Generate Special Bus Cycle
Enable AMD PowerNow! Technology
Management
Reserved
The EPMR register allows software to access the aligned
Enhanced Power Management (EPM) 16-byte block of I/O
address space, which contains bits for enabling, controlling,
and monitoring the enhanced power management features. All
accesses to the EPM 16-byte I/O block must be aligned dword
accesses. Valid accesses to the EPM 16-byte block do not
generate I/O cycles on the host bus, while non-aligned and non-
dword accesses are passed to the host bus.
The EPMR is MSR C000_0086h.
Figure 54 and Table 25 define the EPMR register. An assertion
of RESET clears all of the bits of the 16-byte I/O block to zero
(excluding the Voltage ID Output bits which default to
01010b). BIOS must always initialize the EPMR register and
enhanced power management features whenever RESET is
asserted.
For more information about the EPMR register, see the
Embedded AMD-K6™ Processors BIOS Design Guide Application
Note, order# 23913.
AMD PowerNow!™ Technology
Preliminary Information
Bit
15-4
1
0
16
15
IOBASE
23543A/0—September 2000
4 3
2
G
S
B
C
1
Chapter 6
N
E
0