TMS3637P datasheet(28/53 Pages) TI

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5–10

Table 5–5. Code-Train Modes

TRAIN

2 codes

4 codes

8 codes

Continuous

CC = 1

Triggered

CC = 0, CI = 1

Periodic

CC = 0, CI = 0

1 Code

CD, CE

2 Codes

CD, CE

4 Codes

CD, CE

8 Codes

CD, CE

Normal

CB = 1

Modulated

CB = 0

Transmitter

CA = 1, CF = CG = CH = 0

NO. OF

CODES

TRAIN CODES

Normal

CB = 1

Modulated

CB = 0

Normal

CB = 1

Modulated

CB = 0

1 Code

CD, CE

2 Codes

CD, CE

4 Codes

CD, CE

8 Codes

CD, CE

Figure 5–6. Transmitter Configurations

5.11 Receiver Configurations

As with the transmitter configurations, the TMS3637 uses the last nine bits of the 31 data bits stored in

memory to program the device for a multitude of receiver configurations (48 possible configurations). The

configuration must match the transmitter when selecting the receiver configuration (see Table 5–6 to

determine compatible transmitter and receiver combinations). The definition of which configuration bits to

set for all the possible 48 receiver configurations is discussed in Section 5.12.

In the receive mode, the TMS3637 receives the transmitted code on IN and compares the code with the code

stored in memory. When the two codes are equal, a valid transmission pulse is sent to OUT. To have reliable

reception of the transmitted code, the receiver clock frequency must be approximately seven times greater

than the clock frequency for the transmitter clock. To set any receiver configuration in the receiver mode,

always start by clearing the EEPROM bits CA = CC = 0.

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