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8355 N/B MAINTENANCE
8355 N/B MAINTENANCE
101
Miscellaneous
Signal Name Type Description
RESET_L
I-IOS System Reset
PWROK
I-IOS Indicates that voltages and clocks have reached specified
operation
VID[4:0]
O-IOS Voltage ID to the regulator
THERMDA
A Anode (+) of the thermal diode
THERMDC
A Cathode (–) of the thermal diode
THERMTRIP_L
O-IO-O
D
Thermal Sensor Trip output, asserted at nominal temperature of
125oC.
COREFB_H/L
A Differential feedback for VDD Power Supply
VDDIOFB_H/L
A Differential feedback for VDDIO Power Supply
CORE_SENSE
A VDD voltage monitor pin
VDDA
S Filtered PLL Supply Voltage
VTT_SENSE
A VTT voltage monitor pin
VDDIO_SENS
A VDDIO voltage monitor pin
VDD
S Core power supply
VDDIO
S DDR SDRAM I/O ring power supply
VDDLDT_A
VDDLDT_B
S HyperTransport™ I/O ring power supply for side A and side B
of the package
VTT_A
VTT_B
S VTT regulator voltage for side A and side B of the die
VS
S Ground
HyperTransport™ Technology
Signal Name Type Description
L0_CLKIN_H/L[1:0]
I-HT Link 0 Clock Input
L0_CTLIN_H/L[1:0]
I-HT Link 0 Control Input
2
L0_CADIN_H/L[15:0]
I-HT Link 0 Command/Address/Data Input
L0_CLKOUT_H/L[1:0]
O-HT Link 0 Clock Outputs
L0_CTLOUT_H/L[1:0]
O-HT Link 0 Control Output
L0_CADOUT_H/L[15:0]
O-HT Link 0 Command/Address/Data Outputs
LDTSTOP_L
I-IOS HyperTransport™ Technology Stop Control Input. Used for
power management and for changing HyperTransport link width
and frequency
L0_REF1
A Compensation Resistor to VLDT
1
L0_REF0
A Compensation Resistor to VSS
1
Notes:
1.These pins are used in an alternating fashion to compensate RTT by internal comparison to 3/4
VLDT and 1/4 VLDT and compensate RON by comparison to each other around 1/2 VLDT. For
proper resistor value, see the
AMD Athlon™ 64 Processor Motherboard Design Guide, order
# 24665.
2.The unused L0_CTLIN_H/L[1] pins must be properly terminated such that the true pin is pulled
High and the complement is pulled Low. Refer to the
AMD Athlon™ 64 Processor Motherboard
Design Guide
, order# 24665, for details.
Debug
Signal Name Type Description
DBREQ_L
I-IOS Debug Request
DBRDY
O-IOS Debug Request
5.1 AMD ATHLON
TM
64 Processor-2