TCS3471 Datasheet, PDF (15/23 Pages) TEXAS ADVANCED OPTOELECTRONIC SOLUTIONS – COLOR LIGHT-TO-DIGITAL CONVERTER

TCS3471
COLOR LIGHT-TO-DIGITAL CONVERTER
TAOS115 − MARCH 2011
RGBC Interrupt Threshold Registers (0x04 − 0x07)
The RGBC interrupt threshold registers provides the values to be used as the high and low trigger points for
the comparison function for interrupt generation. If the value generated by the clear channel crosses below the
lower threshold specified, or above the higher threshold, an interrupt is asserted on the interrupt pin.
Table 6. RGBC Interrupt Threshold Registers
REGISTER
AILTL
AILTH
lid ^AIHTL
AIHTH
ADDRESS
0x04
0x05
0x06
0x07
BITS
7:0
7:0
7:0
7:0
DESCRIPTION
RGBC clear channel low threshold lower byte
RGBC clear channel low threshold upper byte
RGBC clear channel high threshold lower byte
RGBC clear channel high threshold upper byte
a _{Persistence Register (0x0C)}
v _{The persistence register controls the filtering interrupt capabilities of the device. Configurable filtering is}
ill ^{provided to allow interrupts to be generated after each integration cycle or if the integration has produced a result}
that is outside of the values specified by the threshold register for some specified amount of time.
AG ^{t st PERS}
s ^{n FIELD}
Reserved
Technicaaml ^{conte APERS}
7
BITS
7:4
3:0
Table 7. Persistence Register
6
5
4
3
2
1
0
Reserved
APERS
Address
0x0C
DESCRIPTION
Reserved
Interrupt persistence. Controls rate of interrupt to the host processor.
FIELD VALUE MEANING
INTERRUPT PERSISTENCE FUNCTION
0000
Every Every RGBC cycle generates an interrupt
0001
1
1 clear channel value outside of threshold range
0010
2
2 clear channel consecutive values out of range
0011
3
3 clear channel consecutive values out of range
0100
5
5 clear channel consecutive values out of range
0101
10
10 clear channel consecutive values out of range
0110
15
15 clear channel consecutive values out of range
0111
20
20 clear channel consecutive values out of range
1000
25
25 clear channel consecutive values out of range
1001
30
30 clear channel consecutive values out of range
1010
35
35 clear channel consecutive values out of range
1011
40
40 clear channel consecutive values out of range
1100
45
45 clear channel consecutive values out of range
1101
50
50 clear channel consecutive values out of range
1110
55
55 clear channel consecutive values out of range
1111
60
60 clear channel consecutive values out of range
Copyright E 2011, TAOS Inc.
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