PT2215-040 데이터 시트보기 (PDF) - Princeton Technology
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PT2215-040 Datasheet PDF : 16 Pages
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Infrared Remote Control Transmitter IC
PT2215
After the key scanning operation has been completed, the key number of the activated keys are used
as the address of the ROM. For a 16-pin PT2215 version, the following sense and driver lines are not
connected -- KI6, KI7, /KO5 and /KO6. Therefore, key numbers 6, 7, 14, 15, 22, 23, 30, 31, 38, 39 and
40 to 55 are not used.
The ROM contains 8 banks of 64 code words. Each key can generate a maximum of 8 different code
words. A multi-system can select 8 different systems (i,e, TV, VCR, Tuner, CD, DVD etc.). PT2215 can
supports a truly multi-function key. The system bits as well as the command bits may be different in the
different banks. The keys may be used to perform the selection. Each key has 3 bank select bits which
are used to determine which bank will be selected for the next key and an “inhibit bit”. When the “inhibit”
bit is set to “1” at a given bank and the corresponding key is press (that is, this given bank has been
selected.), there will be no transmission.
In the case of a single system, the bank selection is made via a jumper wire or a switch. Using the
single system option, it is possible to program different transmitter models in one PT2215 chip. A
side-switch may be used instead of a jumper wire to change the generated code temporarily to obtain
multi-functional keys. The jumper wires or switch must be connected between the sense line KI0 and
one of the drive lines /KO0 to /KO6 or the Ground. KI0 cannot be used to connect keys. For a PT2215
16-pin package, the maximum number of keys is 25 while for a 20-pin package, the maximum number
of keys is 49.
It is important to note that it is not possible to use a combination of jumper wires and selection keys in
a one unit bank selection.
PT2215 V1.1
-5-
April, 2006
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