TMD4903 Datasheet, PDF (59/86 Pages) ams AG – Color and Proximity Sensor Module with mobeam

TMD4903 − Application Information
Figure 70:
Terminology of Pattern RAM
Pattern RAM
The Pattern RAM is 256 bytes in length and is divided into two
banks with 128 bytes each. Both banks must be used to enable
all Pattern RAM. To access the Pattern RAM, write 0 or 1 to
RAM_BANK (0x8D<0>). Functionally, the RAM is split into the
MSB and LSB nibbles; each of which are used to index the
Timeword RAM table. The MSB is used for “pulses”, and the LSB
is used for “gaps”.
Terminology
Pulse
Gap
First of Repeat part
Second of Repeat part
“Single” sub-pattern
“Repeated” sub-pattern
“Complete” Pattern
Terminology of Pattern RAM: Pulses/Gaps, and Single/Repeated/Complete Patterns are shown.
The pulse-gap pair defines when the LED is modulating or
deactivated, respectively. The control logic processes the RAM
locations sequentially until special operator values are
encountered.
ams Datasheet
[v1-12] 2015-May-14
Page 59
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