8 register 4fhh_fan error status, 6 value registers, 8 register 4fh – Rainbow Electronics LM93 User Manual
Page 52: H_fan error status, 1 registers 50–53h, Unfiltered temperature value registers, 2 registers 54–55h, Filtered temperature value registers, 0 registers
16.0 Registers
(Continued)
16.5.8 Register 4Fh
H_Fan Error Status
Register
Address
Read/
Write
Register
Name
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Default
Value
4Fh
RWC
H_Fan
Error Status
RES
FAN4
_ERR
FAN3
_ERR
FAN2
_ERR
FAN1
_ERR
00h
Bit
Name
R/W
Description
Sleep
Masking
0
FAN1_ERR
RWC This bit is set when the Fan Tach 1 value register is above the value set in
the Fan Tach 1 Limit register.
S1*, S3*, S4/5
1
FAN2_ERR
RWC This bit is set when the Fan Tach 2 value register is above the value set in
the Fan Tach 2 Limit register.
S1*, S3*, S4/5
2
FAN3_ERR
RWC This bit is set when the Fan Tach 3 value register is above the value set in
the Fan Tach 3 Limit register.
S1*, S3*, S4/5
3
FAN4_ERR
R
This bit is set when the Fan Tach 4 value register is above the value set in
the Fan Tach 4 Limit register.
S1*, S3*, S4/5
7:4
RES
R
Reserved
N/A
16.6 VALUE REGISTERS
16.6.1 Registers 50–53h
Unfiltered Temperature Value Registers
Register
Address
Read/
Write
Register
Name
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Default
Value
50h
R
Zone 1 (CPU1) Temp
7
6
5
4
3
2
1
0
N/D
51h
R
Zone 2 (CPU1) Temp
7
6
5
4
3
2
1
0
N/D
52h
R
Zone 3 (Internal) Temp
7
6
5
4
3
2
1
0
N/D
53h
R/W
Zone 4
(External Digital) Temp
7
6
5
4
3
2
1
0
N/D
Zones 1, 2 and 3 are all automatically updated by the LM93. The Zone 4 (External Digital) Temp register must be written by an
external SMBus device.
The temperature registers for zones 1 and 2 must return a value of 80h if the remote diode pins are not implemented by the board
designer or are not functioning properly.
16.6.2 Registers 54–55h
Filtered Temperature Value Registers
Register
Address
Read/
Write
Register
Name
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Default
Value
54h
R
Zone 1 (CPU1)
Filtered Temp
7
6
5
4
3
2
1
0
00h
55h
R
Zone 2 (CPU1)
Filtered Temp
7
6
5
4
3
2
1
0
00h
These registers reflect the temperature of zones 1 and 2 after the spike smoothing filter has been applied.
The characteristics of the filtering can be adjusted by using the Zones 1/2 Spike Smoothing Control register.
LM93
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