參數(shù)資料
型號(hào): NCT7491RQR2G
廠商: ON Semiconductor
文件頁(yè)數(shù): 75/80頁(yè)
文件大小: 844K
描述: IC REMOTE THERMAL MONITOR 24QSOP
標(biāo)準(zhǔn)包裝: 2,500
系列: *
NCT7491
http://onsemi.com
75
Table 138. REGISTER 0xC7  SMBus Master Trange/Interval (PowerOn Default = 0x0C)
Bit
Name
R/W
Description
<3:0>
RNG
R/W
These bits determine the PWM duty cycle vs. the temperature range for automatic fan control.
0000 = 2癈
0001 = 2.5癈
0010 = 3.33癈
0011 = 4癈
0100 = 5癈
0101 = 6.67癈
0110 = 8癈
0111 = 10癈
1000 = 13.33癈
1001 = 16癈
1010 = 20癈
1011 = 26.67癈
1100 = 32癈 (default)
1101 = 40癈
1110 = 53.33癈
1111 = 80癈
<5:4>
Reserved
<7:6>
SMBINT
R/W
Sets the SMBus Master loop time
00 = 250 ms
01 = 500 ms
10 = 750 ms
11 = 1 sec
Table 139. PUSH TEMPERATURE REGISTERS
Register Address
R/W
Description
PowerOn Default
0xC8
R/W
Push0. This register is programmable by an external master to allow tem-
peratures gathered externally to be used by the NCT7491 fan control loop
0x00
0xC9
R/W
Push1. This register is programmable by an external master to allow tem-
peratures gathered externally to be used by the NCT7491 fan control loop
0x00
0xCA
R/W
Push2. This register is programmable by an external master to allow tem-
peratures gathered externally to be used by the NCT7491 fan control loop
0x00
0xCB
Push3. This register is programmable by an external master to allow tem-
peratures gathered externally to be used by the NCT7491 fan control loop
0x00
Table 140. PUSH TMIN REGISTER
Register Address
R/W
Description
PowerOn Default
0xCC
R/W
Push Device Tmin value. This sets the the temperature at which fans con-
trolled by any SMBus slave device will turn on. This value applies to all 4
Push temperature registers.
This value should be programmed in the range 0癈 to 127癈
0x5A
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