Rainbow Electronics LM93 - Manual (Page 5)

Table of Contents
(Continued)
15.6 ERROR STATUS REGISTERS ............................................................................................................. 27
15.6.1 ASF Mode ........................................................................................................................................ 27
15.7 MASKING, ERROR STATUS AND ALERT ........................................................................................... 27
15.8 LAYOUT AND GROUNDING ................................................................................................................ 27
15.9 THERMAL DIODE APPLICATION ......................................................................................................... 27
15.9.1 Accuracy Effects of Diode Non-Ideality Factor ................................................................................ 28
15.9.2 PCB Layout for Minimizing Noise .................................................................................................... 28
15.10 FAN CONTROL ................................................................................................................................... 28
15.10.1 Automatic Fan Control Algorithm ................................................................................................... 28
15.10.2 Fan Control Temperature Resolution ............................................................................................ 30
15.10.3 Zone 1-4 to PWM1-2 Binding ........................................................................................................ 31
15.10.4 Fan Control Duty Cycles ............................................................................................................... 31
15.10.5 Alternate PWM Frequencies .......................................................................................................... 31
15.10.6 Fan Control Priorities ..................................................................................................................... 31
15.10.7 PWM to 100% Conditions ............................................................................................................. 31
15.10.8 VRDx_HOT Ramp-Up/Ramp-Down .............................................................................................. 32
15.10.9 PROCHOT Ramp-Up/Ramp-Down ............................................................................................... 32
15.10.10 Manual PWM Override ................................................................................................................ 32
15.10.11 Fan Spin-Up Control .................................................................................................................... 32
15.11 XOR TREE TEST ................................................................................................................................ 33
16.0 Registers .................................................................................................................................................. 34
16.1 REGISTER WARNINGS ....................................................................................................................... 34
16.2 REGISTER SUMMARY TABLE ............................................................................................................. 34
16.3 FACTORY REGISTERS 00h–3Fh ........................................................................................................ 40
16.3.1 Register 00h XOR Test ................................................................................................................. 40
16.3.2 Register 01h SMBus Test ............................................................................................................. 40
16.3.3 Register 3Eh Manufacturer ID ...................................................................................................... 40
16.3.4 Register 3Fh Version/Stepping ..................................................................................................... 40
16.4 BMC ERROR STATUS REGISTERS 40h–47h .................................................................................... 41
16.4.1 Register 40h B_Error Status 1 ...................................................................................................... 41
16.4.2 Register 41h B_Error Status 2 ...................................................................................................... 42
16.4.3 Register 42h B_Error Status 3 ...................................................................................................... 42
16.4.4 Register 43h B_Error Status 4 ...................................................................................................... 43
16.4.5 Register 44h B_P1_PROCHOT Error Status ............................................................................... 43
16.4.6 Register 45h B_P2_PROCHOT Error Status ............................................................................... 44
16.4.7 Register 46h B_GPI Error Status .................................................................................................. 44
16.4.8 Register 47h B_Fan Error Status .................................................................................................. 45
16.5 HOST ERROR STATUS REGISTERS .................................................................................................. 45
16.5.1 Register 48h H_Error Status 1 ...................................................................................................... 45
16.5.2 Register 49h H_Error Status 2 ...................................................................................................... 46
16.5.3 Register 4Ah H_Error Status 3 ..................................................................................................... 47
16.5.4 Register 4Bh H_Error Status 4 ..................................................................................................... 48
16.5.5 Register 4Ch H_P1_PROCHOT Error Status ............................................................................... 49
16.5.6 Register 4Dh B_P2_PROCHOT Error Status ............................................................................... 50
16.5.7 Register 4Eh H_GPI Error Status ................................................................................................. 51
16.5.8 Register 4Fh H_Fan Error Status ................................................................................................. 52
16.6 VALUE REGISTERS ............................................................................................................................. 52
16.6.1 Registers 50–53h Unfiltered Temperature Value Registers ......................................................... 52
16.6.2 Registers 54–55h Filtered Temperature Value Registers ............................................................. 52
16.6.3 Register 56–65h A/D Channel Voltage Registers ........................................................................ 53
16.6.4 Register 67h Current P1_PROCHOT ........................................................................................... 53
16.6.5 Register 68h Average P1_PROCHOT .......................................................................................... 54
16.6.6 Register 69h Current P2_PROCHOT ........................................................................................... 54
16.6.7 Register 6Ah Average P2_PROCHOT ......................................................................................... 54
16.6.8 Register 6Bh GPI State ................................................................................................................. 55
16.6.9 Register 6Ch P1_VID .................................................................................................................... 55
16.6.10 Register 6Dh P2_VID .................................................................................................................. 55
16.6.11 Register 6E–75h Fan Tachometer Readings .............................................................................. 56
16.7 LIMIT REGISTERS ................................................................................................................................ 57
16.7.1 Registers 78–7Fh Temperature Limit Registers ........................................................................... 57
16.7.2 Registers 80–83h Fan Boost Temperature Registers .................................................................. 57
LM93
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