TMD4903 Datasheet, PDF (40/86 Pages) ams AG – Color and Proximity Sensor Module with mobeam

Figure 46:
IRBeam Symbol Looping Register
7
6
5
TMD4903− RegisterDescription
IRBeam Symbol Looping Register (ISNL 0xA2)
4
3
2
1
0
ISNL
Field
ISNL
Bits
7:0
Description
IRBeam Symbol Looping. Sets the number of times that a Symbol is repeated in
each Packet. A Symbol is a single IRBeam data transmission. The following
equation describes the number of Symbols per Packet as a function of ISNL:
n_{Symbol Repetitions} = ISNL + 1
Figure 47:
IRBeam Inter-Symbol OFF Register
IRBeam Inter-Symbol OFF Register
(ISOFF 0xA3)
7
6
5
4
3
2
1
0
ISOFF
Field
ISOFF
Bits
7:0
Description
Inter-Symbol Delay Time. Defines the delay (LED OFF) between Symbols within
Packets, t_ISDT, which can range from 4.25μs to 127.75μs. The minimum permitted
register value is 8. The following equation describes the time delay as a function
of ISOFF and IBT:
t_ISDT = [(2 X ISOFF) + 1] X t_IBT
Page 40
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ams Datasheet
[v1-12] 2015-May-14