Intel E6420 Data Sheet - Page 116
Thermal Module Assembly Power Supply
UPC - 735858192569
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Balanced Technology Extended (BTX) Boxed Processor Specifications 8.2 Electrical Requirements 8.2.1 Thermal Module Assembly Power Supply The boxed processor's Thermal Module Assembly (TMA) requires a +12 V power supply. The TMA will include power cable to power the integrated fan and will plug into the 4wire fan header on the baseboard. The power cable connector and pinout are shown in Figure 45. Baseboards must provide a compatible power header to support the boxed processor. Table 40contains specifications for the input and output signals at the TMA. The TMA outputs a SENSE signal, which is an open-collector output that pulses at a rate of 2 pulses per fan revolution. A baseboard pull-up resistor provides VOH to match the system board-mounted fan speed monitor requirements, if applicable. Use of the SENSE signal is optional. If the SENSE signal is not used, pin 3 of the connector should be tied to GND. The TMA receives a Pulse Width Modulation (PWM) signal from the motherboard from the 4th pin of the connector labeled as CONTROL. Note: Figure 45. The boxed processor's TMA requires a constant +12 V supplied to pin 2 and does not support variable voltage control or 3-pin PWM control. The power header on the baseboard must be positioned to allow the TMA power cable to reach it. The power header identification and location should be documented in the platform documentation, or on the system board itself. Figure 46 shows the location of the fan power connector relative to the processor socket. The baseboard power header should be positioned within 4.33 inches from the center of the processor socket. Boxed Processor TMA Power Cable Connector Description 1 2 34 Pin Signal 1 GND 2 +12 V 3 SENSE 4 CONTROL Straight square pin, 4-pin terminal housing with polarizing ribs and friction locking ramp. 0.100" pitch, 0.025" square pin width. Match with straight pin, friction lock header on mainboard. B d P P C bl 116 Datasheet