ADT7490_16 Datasheet, PDF (48/75 Pages) ON Semiconductor – Remote Thermal Monitor and Fan Controller

ADT7490
Table 44. ADT7490 REGISTERS (continued)
Addr
0x8F
R/W
R/W
0x90 R/W
0x94 R/W
0x95 R/W
0x96 R/W
0x97 R/W
−
0x41
Desc
Dynamic
T_MIN
Control
Reg. 2
Dynamic
T_MIN
Control
Reg. 3
PECI0
Temp.
Offset
PECI1
Temp.
Offset
PECI2
Temp.
Offset
PECI3
Temp.
Offset
−
Bit 7
CYR2
PECI
7
7
7
7
−
Bit 6
CYR2
PHTP
6
6
6
6
0x74
Bit 5
CYL
CYP
5
5
5
5
OOL
Bit 4
CYL
CYP
4
4
4
4
R2T
Bit 3
CYL
CYP
3
3
3
3
LT
Bit 2
CYR1
RES
2
2
2
2
R1T
Bit 1
CYR1
Bit 0
CYR1
De-
fault
0x00
Lock-
able
Yes
RES
RES
0x00
Yes
1
1
1
1
+5V_IN
0
0x00
Yes
0
0x00
Yes
0
0x00
Yes
0
0x00
Yes
V_CC
V_CCP +2.5V_IN/
THERM
Table 45. REGISTER 0x10 − CONFIGURATION REGISTER 6 (POWER-ON DEFAULT = 0x00)
Bit No.
[0]
Mnemonic
SLOW
Remote 1
R/W (Note 1)
R/W
Description
When this bit is set, fan smoothing times are multiplied x4 for Remote 1 temperature channel
(as defined in Register 0x62).
[1]
SLOW
Local
R/W
When this bit is set, fan smoothing times are multiplied x4 for local temperature channel
(as defined in Register 0x63).
[2]
SLOW
Remote 2
R/W
When this bit is set, fan smoothing times are multiplied x4 for Remote 2 temperature channel
(as defined in Register 0x63).
[3]
Res
N/A
Reserved
[4]
Res
N/A
Reserved
[5]
Res
N/A
Reserved
[6]
V_CCP Low
R/W
V_CCP Low = 1. When the power is supplied from 3.3 V STANDBY and the core voltage
(V_CCP) drops below its V_CCP low limit value (Register 0x46), the following occurs:
Status Bit 1 in Status Register 1 is set.
SMBALERT is generated, if enabled.
PROCHOT monitoring is disabled.
Everything is re-enabled once V_CCP increases above the V_CCP low limit.
When V_CCP increases above the low limit:
PROCHOT monitoring is enabled.
Fans return to their programmed state after a spin-up cycle.
[7]
ExtraSlow
R/W
When this bit is set, all fan smoothing times are increased by a further 39.2%
1. This register becomes read-only when the Configuration Register 1 (0x40) Lock bit is set to 1. Any subsequent attempts to write to this
register fail.
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