參數(shù)資料
型號(hào)： ASC7512M8
廠商： Electronic Theatre Controls, Inc.
元件分類(lèi)： 溫度/濕度傳感器
英文描述： DIGITAL TEMPERATURE SENSOR WITH INTEGRATED FAN CONTROL
中文描述： 數(shù)字溫度傳感器整合了風(fēng)扇控制
文件頁(yè)數(shù)： 13/35頁(yè)
文件大?。?/td> 337K
代理商： ASC7512M8
- 13 -
Andigilog, Inc. 2006
www.andigilog.com
August 2006 - 70A05003
aSC7512
Temperature Measurement
Temperatures are measured with a precision Delta-V
BE
methodology converted to a digital temperature reading by a 10-bit
sigma-delta converter. The user may set limits on these readings to be continuously monitored and alarm bits set when they
are exceeded. Separately, the measurements are also delivered to the automatic fan control system to adjust fan speed. The
following registers contain the readings from the internal and remote sensors.
Registers 25-10h and 26-15h: Zone Temperature Reading (10-Bit, 2’s Complement Reporting)
Register
Address
Read/
Write
Register Name
Bit 7
(MSB)
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
(LSB)
Default
Value
25h
R
Zone 1
Temperature
9
8
7
6
5
4
3
2
00
10h
R
Zone 1
Temperature (LS
Byte)
Zone 2
Temperature
1
0
X
X
X
X
X
X
00
26h
R
9
8
7
6
5
4
3
2
00
15h
R
Zone 2
Temperature (LS
Byte)
1
0
X
X
X
X
X
X
00
The Zone Temperature registers reflect the current temperature of the internal and remote diodes. Processor (Zone 1)
Temp register reports the temperature measured by the thermal diode connected to the Remote - and Remote + pins.
Internal (Zone 2) Temp register reports the temperature measured by the internal (junction) temperature sensor.
Temperatures are represented as 10 bit, 2’s complement, signed numbers, in Celsius, as shown below in Table 1.
The Temperature Reading register will return a value of 8000h if the remote diode pins are not used by the board designer or
are not functioning properly. This reading will cause the zone limit bit (bit 4) in the Interrupt Status Register (41h) and the
remote diode fault status bit (bit 6) in the Interrupt Status Register 2 (42h) to be set. These registers are read-only – a write
to these registers has no effect.
Digital Output (2’s Complement)
High Byte
Low Byte
Temperature
10-Bit Resolution
Ignore
+125
°
C
+100
°
C
+50
°
C
+25
°
C
+10
°
C
+1.75
°
C
+0.25
°
C
0
°
C
-1.75
°
C
-55
°
C
0111
0110
0011
0001
0000
0000
0000
0000
1111
1100
1101
0100
0010
1001
1010
0001
0000
0000
1110
1001
00
00
00
00
00
11
01
00
01
00
XX
XX
XX
XX
XX
XX
XX
XX
XX
XX
XXXX
XXXX
XXXX
XXXX
XXXX
XXXX
XXXX
XXXX
XXXX
XXXX
Table 1 Relationship between Temperature and 2’s Complement Digital Output, -55°C to +125°C
Temperature Measurement Configuration and ALERT Limits
Registers 09h, 0Ah, 0Fh, 22h: Conversion Rate and ALERT Configuration
Register
Address
Read/
Write
Register Name
Bit 7
(MSB)
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
(LSB)
Default
Value
09h
R/W
Configuration
Alert
Mask
Run/
Stop
Alert/
Tach
RES
RES
RES
RES
RES
00
0Ah
R/W
Conversion Rate
CONV7
CONV6
CONV5
CONV4
CONV3
CONV2
CONV1
CONV0
08
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