ALXD800EEXJ2VD AMD (ADVANCED MICRO DEVICES), ALXD800EEXJ2VD Datasheet - Page 556

• Manufacturer Part Number: ALXD800EEXJ2VD
• Manufacturer: AMD (ADVANCED MICRO DEVICES)

Specifications of ALXD800EEXJ2VD

• Operating Temperature (min): 0C
• Operating Temperature (max): 85C
• Operating Temperature Classification: Commercial
• Mounting: Surface Mount
• Lead Free Status / RoHS Status: Compliant

6.14.2.18 GLCP Level 2 (GLCP_LVL2)
MSR Address
Type
Reset Value
This register has no writable bits. I/O reads to the lower byte of this register (with or without reading the other three bytes)
return 0 and cause the system to enter “C2 processor state” as defined by the GLIU1 power management spec; that is, sus-
pend the processor. I/O reads to the lower byte of this register may trigger an SMI if GLD_MSR_SMI (MSR 4C002002h) is
configured appropriately. Note that the suspend starts after a delay specified by GLCP_TH_SD (MSR 4C00001Ch), which
can allow for SMI handling or any other preparations. P_LVL2_IN (MSR 4C00001Ch[12]) can abort the suspend operation.
MSR reads to this register return 0, but perform no further action.
556
63 62 61 60 59 58 57 56 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10
63:5
Bit
3:0
4
Name
RSVD
THT_EN
CLK_VAL
4C000019h
R/W - I/O Offset 04h
00000000_00000000h
33234C
Description
Reserved. Write as read.
Throttle Enable. When high, enables throttling of processor for power management.
This bit is always cleared by an NMI to the processor or when system sleep initiates, it
may clear from an SMI or IRQ depending on GLCP_TH_OD (MSR 4C00001Eh) settings.
Clock Throttling Value. The value 0000 is reserved and should not be used. The value
0001 yields the most throttling while the value 1111 has the effect of no throttling (1111 is
the reset value). Reads return value written. THT_EN (bit 4) must be low to change the
value of CLK_VAL. See also GLCP_TH_SF (MSR 4C00001Dh). During processor throt-
tling, processor suspend is applied the amount of time of “(15-CLK_VAL)*GLCP_TH_SF”
and then removed the amount of time of “CLK_VAL*GLCP_TH_SF”.
GLCP_CNT Bit Descriptions
GLCP_CNT Register Map
RSVD
RSVD
GeodeLink™ Control Processor Register Descriptions
AMD Geode™ LX Processors Data Book
9
8
7
6
5
4
3
CLK_VAL
2
1
0