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參數(shù)資料
| 型號： | NCT7491RQR2G |
| 廠商： | ON Semiconductor |
| 文件頁數(shù)： | 49/80頁 |
| 文件大小： | 844K |
| 描述： | IC REMOTE THERMAL MONITOR 24QSOP |
| 標(biāo)準(zhǔn)包裝： | 2,500 |
| 系列： | * |
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NCT7491
http://onsemi.com
49
Table 44. REGISTER 0x18 THERM Configuration Register 3 (PowerOn Default = 0x00)
Bit
Mnemonic
R/W
Description
<3:0>
SMBSTEP
R/W
Sets the Step size used by the THERM stepping function when applied to SMBus Master
device THERM assertions
<7:4>
PECSTEP
R/W
Sets the Step size used by the THERM stepping function when applied to PECI Tcontrol
assertions
Table 45. REGISTER 0x19 THERM Configuration Register 4 (PowerOn Default = 0x00)
Bit
Mnemonic
R/W
Description
<3:0>
SNRSTEP
R/W
Sets the Step size used by the THERM stepping function when applied to Remote1/Local/
Remote2 sensor THERM assertions
<7:4>
PSHSTEP
R/W
Sets the Step size used by the THERM stepping function when applied to Push temperature
THERM assertions
Table 46. PECI READING REGISTERS (PowerOn Default = 0x80)
Register Address
R/W
Description
0x33
R
PECI0: This register reads the 8 bits representative of PECI0
0x1A
R
PECI1: This register reads the 8 bits representative of PECI1
0x1B
R
PECI2: This register reads the 8 bits representative of PECI2
0x1C
R
PECI3: This register reads the 8 bits representative of PECI 3
Table 47. DEVICE ID REGISTER (PowerOn Default = 0x91)
Register Address
R/W
Description
PowerOn Default
0x1D
R
Device ID
0x91
Table 48. V
TT
READING REGISTER (PowerOn Default = 0x00)
Register Address
R/W
Description
0x1E
R
Reflects the voltage measurement at the V
TT
input on Pin 8 of the QSOP package, Pin 5 of the
QFN package (8 MSBs of reading). Input range of 0 to 2v
Table 49. REGISTER 0x1F EXTENDED RESOLUTION 3 (PowerOn Default = 0x00)
Bits
R/W
Description
<3:0>
R
RESERVED
<5:4>
R
Bits <5:4> hold the two LSBs of the 10bit V
TT
measurement
<7:6>
R
RESERVED
Table 50. VOLTAGE READING REGISTERS (PowerOn Default = 0x00) (Note 7)
Register Address
R/W
Description
0x20
R
Reflects the voltage measurement at the 2.5 V input on Pin 22 of the QSOP package, Pin 19 of
the QFN package (8 MSBs of reading).
0x21
R
Reflects the voltage measurement (Note 8) at the V
CCP
input on Pin 23 of the QSOP package,
Pin 20 of the QFN package (8 MSBs of reading).
0x22
R
Reflects the voltage measurement (Note 9) at the V
CC
input on Pin 4 of the QSOP package,
Pin 1 of the QFN package (8 MSBs of reading).
0x23
R
Reflects the voltage measurement at the 5 V input on Pin 20 of the QSOP package, Pin 17 of
the QFN package (8 MSBs of reading).
0x24
R
Reflects the voltage measurement at the 12 V input on Pin 21 of the QSOP package, Pin 18 of
the QFN package (8 MSBs of reading).
7. If the extended resolution bits of these readings are also being read, the extended resolution registers (Reg. 0x76, 0x77) must be read first.
Once the extended resolution registers have been read, the associated MSB reading registers are frozen until read. Both the extended
resolution registers and the MSB registers are frozen.
8. If V
CCP
Low (Bit 6 of 0x10) is set, V
CCP
can control the sleep state of the NCT7491.
9. V
CC
(Pin 4 on the QSOP package, Pin1 on the QFN package) is the supply voltage for the NCT7491.
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