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参数资料
| 型号： | TC1068MQR |
| 元件分类： | 模拟信号调理 |
| 英文描述： | SPECIALTY ANALOG CIRCUIT, PDSO16 |
| 封装： | QSOP-16 |
| 文件页数： | 3/14页 |
| 文件大小： | 76K |
| 代理商： | TC1068MQR |
11
TC1068
SMBus Thermal Sensor with
External Diode Input
TC1068-1 2/8/99
2001 Microchip Technology Inc. DS21352A
Temperature Registers, 8-Bits, Read-Only
(INT_TEMP, EXT_TEMP)
The binary value (2’s complement format) in these two
registers represents temperature of the internal and exter-
nal sensors following a conversion cycle. The registers are
automatically updated in an alternating manner.
Internal Temperature Register (INT_TEMP)
D[7]
D[6]
D[5]
D[4]
D[3]
D[2]
D[1]
D[0]
MSB
x
LSB
External Temperature Register (EXT_TEMP)
D[7]
D[6]
D[5]
D[4]
D[3]
D[2]
D[1]
D[0]
MSB
x
LSB
Temperature Threshold Setpoint Registers,
8-Bits, Read-Write (INT_HLIM, INT_LLIM,
EXT_HLIM, EXT_LLIM)
These registers store the values of the upper and lower
temperature setpoints for event detection. The value is in
2’s-complement binary. INT_HLIM and INT_LLIM are com-
pared with the INT_TEMP value, and EXT_HLIM and
EXT_LLIM are compared with EXT_TEMP. These registers
may be written at any time.
Internal High Limit Setpoint Register (INT_HLIM)
D[7]
D[6]
D[5]
D[4]
D[3]
D[2]
D[1]
D[0]
MSB
x
LSB
Internal Low Limit Setpoint Register (INT_LLIM)
D[7]
D[6]
D[5]
D[4]
D[3]
D[2]
D[1]
D[0]
MSB
x
LSB
External High Limit Setpoint Register (EXT_HLIM)
D[7]
D[6]
D[5]
D[4]
D[3]
D[2]
D[1]
D[0]
MSB
x
LSB
External Low Limit Setpoint Register (EXT_LLIM)
D[7]
D[6]
D[5]
D[4]
D[3]
D[2]
D[1]
D[0]
MSB
x
LSB
NOTE: POR states:
INT_HLIM
01111111b
+127
°C
INT_LLIM
11001001b
–55
°C
EXT_HLIM
01111111b
+127
°C
EXT_LLIM
11001001b
–55
°C
In the two temperature data and four threshold setpoint
registers, each unit value represents one degree (Celsius).
The value is in 2’s-complement binary format such that a
reading of 00000000b corresponds to 0
°C. Examples of this
temperature-to-binary value relationship are shown in the
following table.
Temperature-to-Digital Value Conversion
(INT_TEMP, EXT_TEMP, INT_HLIM, INT_LLIM,
EXT_HLIM, EXT_LLIM)
Actual
Rounded
Binary
Hex
Temperature
Value
+130.00
°C
+127
°C
01111111
7F
+127.00
°C
+127
°C
01111111
7F
+126.50
°C
+127
°C
01111111
7F
+25.25
°C
+25
°C
00011001
19
+0.50
°C+1°C
00000001
01
+0.25
°C0°C
00000000
00
0.00
°C0°C
00000000
00
–0.25
°C0°C
00000000
00
–0.50
°C0°C
00000000
00
–0.75
°C–1°C
11111111
FF
–1.00
°C–1°C
11111111
FF
–25.00
°C
–25
°C
11100111
E7
–25.25
°C
–25
°C
11100110
E7
–54.75
°C
–55
°C
11001001
C9
–55.00
°C
–55
°C
11001001
C9
–65.00
°C
–65
°C
10111111
BF
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