LM93CIMT National Semiconductor, LM93CIMT Datasheet - Page 10

• Manufacturer Part Number: LM93CIMT
• Description: Microprocessor Support IC
• Manufacturer: National Semiconductor

Specifications of LM93CIMT

• Peak Reflow Compatible (260 C): No
• Supply Voltage Max: 3.6V
• Leaded Process Compatible: No
• Supply Voltage Min: 3V
• Operating Temperature Min: 0��C
• Package / Case: 56-TSSOP
• Operating Temperature Max: 85°C
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

www.national.com
Symbol
AD_IN16
GND
PWM1
PWM2
P1_VID0
P1_VID1
P1_VID2
P1_VID3
P1_VID4
P1_VID5
P1_PROCHOT
P2_PROCHOT
P2_VID0
P2_VID1
P2_VID2
P2_VID3
P2_VID4
P2_VID5
9.0 Pin Descriptions
The overscore indicates the signal is active low (“Not”).
10.0 Server Terminology
A/D
ACPI
ALERT
ASF
BMC
BW
DIMM
DP
ECC
FRU
FSB
Analog to Digital Converter
Advanced Configuration and Power
Interface
SMBus signal to bus master that an event
occurred that has been flagged for
attention.
Alert Standard Format
Baseboard Micro-Controller
Bandwidth
Dual inline memory module
Dual-processor
Error checking and correcting
Field replaceable unit
Front side bus
Pin #
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
Type
POWER (V
standby power
GROUND
Digital Output
(Open-Drain)
Digital Output
(Open-Drain)
Digital Input
Digital Input
Digital Input
Digital Input
Digital Input
Digital Input
Digital I/O
(Open-Drain)
Digital I/O
(Open-Drain)
Digital Input
Digital Input
Digital Input
Digital Input
Digital Input
Digital Input
(Continued)
DD
) +3.3V
Function
V
standby power.
The LM93 can be powered by +3.3V if monitoring in low power
states is not required, but power should be applied to this input
before any other pins.
This pin also serves as the analog input to monitor the 3.3V
stand-by (SB) voltage. It is necessary to bypass this pin with a 0.1
µF in parallel with 100 pF. A bulk capacitance of 10 µF should be in
the near vicinity. The 100 pF should be closest to the power pin.
Digital Ground. Digital ground and analog ground need to be tied
together at the chip then both taken to a low noise system ground.
A voltage difference between analog and digital ground may cause
erroneous results.
Fan control output 1.
Fan control output 2
Voltage Identification signal from the processor.
Voltage Identification signal from the processor.
Voltage Identification signal from the processor.
Voltage Identification signal from the processor.
Voltage Identification signal from the processor.
Voltage Identification signal from the processor.
Connected to CPU1 PROCHOT (processor hot) signal through a
bidirectional level shifter.
Connected to CPU2 PROCHOT (processor hot) signal through a
bi-directional level shifter.
Voltage Identification signal from the processor.
Voltage Identification signal from the processor.
Voltage Identification signal from the processor.
Voltage Identification signal from the processor.
Voltage Identification signal from the processor.
Voltage Identification signal from the processor.
DD
10
power input for LM93. Generally this is connected to +3.3V
FW
Gb
GB
Gbe
GPIO
HW
I
LAN
LVDS
Mb
MB
MP
MTBF
2
C
Firmware
Gigabit
Gigabyte
Gigabit Ethernet
General purpose I/O
Hardware
Inter integrated circuit (bus)
Local area network
Low-Voltage Differential Signaling
Megabit
Megabyte
Multi-processor
Mean time between failures