mlx90308ccc Micro Electronics Ltd., mlx90308ccc Datasheet - Page 13

• Manufacturer Part Number: mlx90308ccc
• Description: Programmable Sensor Interface
• Manufacturer: Micro Electronics Ltd.

Table 7. Alarm Source Bit Definition
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.
MLX902xx Name of Sensor
MLX90308CCC Programmable Sensor Interface
Output
Output
High
Low
Selected input
Figure 5.
Alarm Function
OUTPUT
GNO
VMO
TPO
IAO
IO1
IO2
Trigger
Low
Input Signal
MUX Value
MLX90308
Trigger
High
0010
0110
0000
0011
0100
0101
Rev Y.X
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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
Programmable Sensor Interface
VBP
VBN
TMP
IO1
IO2
Bidirectional
Figure 6.
Alarm & Steering
Source Points
Figure 7. Level Steering
Function
IO1, IO2
(I02,I01)
OFC
& Amp
Offset
Temp
Sense
0 - 0
I/O
Level 1
IAO
FLT
0 - 1
TPO
22/Aug/98
MLX90308CCC
COMS
UART
ADC
DAC
&
Rev 2.2
Gain
Level 2
VDD1 FET VDD GND
GNO
1 - 0
Power Supply
Microcontroller
Core, Memory,
Regulation
Reset,Test,&
EEPROM
Oscillator
MLX90308
Level 3
CM
VM
23/Oct/01
1 -1
Page 13
CMO
VMO
TSTB
CMN