Rainbow Electronics LM93 - Manual (Page 9)

9.0 Pin Descriptions
(Continued)
Symbol Pin # Type Function
REMOTE2− 21 Remote Thermal
Diode_2 - Input
(CPU2 THERMDC)
This is the negative input (current sink) from the CPU2 thermal
diode. Connected to THERMDC pin of Pentium processor or the
emitter of a diode connected MMBT3904 NPN transistor. Serves as
the negative input into the A/D for thermal diode voltage
measurements. A 100 pF capacitor is optional and can be
connected between REMOTE2− and REMOTE2+.
REMOTE2+ 22 Remote Thermal
Diode_2 + I/O (CPU2
THERMDA)
This is a positive connection to the CPU2 thermal diode. Serves as
the positive input into the A/D for thermal diode voltage
measurements. It also serves as a current source output that
forward biases the thermal diode. Connected to THERMDA pin of
Pentium processor or the base of a diode connected MMBT3904
NPN transistor. A 100 pF capacitor is optional and can be
connected between REMOTE2− and REMOTE2+.
AD_IN1 23 Analog Input (+12V1) Analog Input for +12V Rail 1 monitoring, for CPU1 voltage regulator.
External attenuation resistors required such that 12V is attenuated
to 0.927V.
AD_IN2 24 Analog Input (+12V2) Analog Input for +12V Rail 2 monitoring, for CPU2 voltage regulator.
External attenuation resistors required such that 12V is attenuated
to 0.927V.
AD_IN3 25 Analog Input (+12V3) Analog Input for +12V Rail 3, for Memory/3GIO slots. External
attenuation resistors required such that 12V is attenuated to 0.927V.
AD_IN4 26 Analog Input
(FSB_Vtt)
Analog input for 1.2V monitoring
AD_IN5 27 Analog Input (3GIO /
PXH / MCH_Core)
Analog input for 1.5V monitoring.
AD_IN6 28 Analog Input
(ICH_Core)
Analog input for 1.5V monitoring.
AD_IN7 (P1_Vccp) 29 Analog Input
(CPU1_Vccp)
Analog input for +Vccp (processor voltage) monitoring.
AD_IN8 (P2_Vccp) 30 Analog Input
(CPU2_Vccp)
Analog input for +Vccp (processor voltage) monitoring.
AD_IN9 31 Analog Input (+3.3V) Analog input for +3.3V monitoring.
AD_IN10 32 Analog Input (+5V) Analog input for +5V monitoring silver box supply monitoring.
AD_IN11 33 Analog Input
(SCSI_Core)
Analog input for +2.5V monitoring.
AD_IN12 34 Analog Input
(Mem_Core)
Analog input for +1.969V monitoring.
AD_IN13 35 Analog Input
(Mem_Vtt)
Analog input for +0.984V monitoring.
AD_IN14 36 Analog Input
(Gbit_Core)
Analog input for +0.984V S/B monitoring.
AD_IN15 37 Analog Input (-12V) Analog input for -12V monitoring. External resistors required to scale
to positive level. Full scale reading at 1.236V.
Address Select 38 3 level analog input This input selects the lower two bits of the LM93 SMBus slave
address.
LM93
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