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參數(shù)資料
| 型號： | MLX90308CAB |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | Programmable Sensor Interface |
| 中文描述： | 可編程傳感器接口 |
| 文件頁數(shù)： | 13/26頁 |
| 文件大?。?/td> | 537K |
| 代理商： | MLX90308CAB |
MLX90308CAB Programmable Sensor Interface Page 13 Rev 3.0 21/May/01
MLX90308CAB
Programmable Sensor Interface
Figure 5.
Alarm Function
OUTPUT
O
Input Signal
MLX90308
Low
Output
Low
Trigger
High
Trigger
High
Output
Selected input
TPO
IAO
GNO
VMO
IO1
IO2
MUX Value
0010
0110
0000
0011
0100
0101
Table 7. Alarm Source Bit Definition
Figure 6.
Alarm & Steering
Source Points
VMO
CMO
CMN
TSTB
VM
Gain
CM
Offset
Power Supply
Regulation
Temp
Sense
& Amp
Bidirectional
I/O
ADC
&
DAC
UART
Microcontroller
Core, Memory,
EEPROM
Reset,Test,&
Oscillator
OFC
FLT
VDD1
FET VDD GND
COMS
IO2
IO1
TMP
VBN
VBP
IAO
GNO
TPO
Alarm Option
This option allows controlling the low and high limits
of the output (See Figure 5.). The output level is set
when the output tries to exceed the programmed
limits. Five bytes are reserved for this option. The
first byte is the low trigger limit and the second the
low output. The third and fourth bytes are used for
the high limit and the output. The fifth byte is the
alarm control, used to select the alarm input. The
different levels are programmed as eight bit
numbers. These correspond to the 8 upper bits of
the 10 bit signal measurement. When the alarm
mode is not used, all of the data is 0. The control
code is coded as shown in Table 7. The six possible
signals are listed below and are encoded on the 4
MSB’s of byte 31 of the EEPROM.
IO1 & IO2
IO1 and IO2 are used in the alarm and level steering
modes. For custom firmware, they can be used for a
digital input, an analog input, or a digital output.
Figure 7. Level Steering
Function
IO1, IO2
P
MLX90308
Level 1
1 -1
1 - 0
0 - 1
0 - 0
(I02,I01)
Level 2
Level 3
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