STV3012 查看數據表（PDF） - STMicroelectronics

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STV3012

REMOTE CONTROL TRANSMITTER FOR AUDIO AND VIDEO APPLICATIONS

STMicroelectronics 

STV3012

Figure 1 : Data Format of REMO ; T0 and T1 = toggle bits ; S0, S1, S2 and S3 = sub-system address ;

A, B, C, D, E, F and G = command bits

MODE A

tw

H

REMO

L

bit

S3 S2 S1 S0 T0 G F E D C B A

S3

data

0 1 0 1 0 1 00 1 00 1

MODE B

tw

H

REMO

L

bit

T0 T1 S2 S1 S0 F E D C B A

T0

data

0

1

0

1

0

1

00

1

00

Bit Separation (tB)

Logic "0"

Logic "1"

Toggle bit time

Mode A

1 x t0

2 x t0

1 x t0 or 2 x t0

Mode B

2 x t0

3 x t0

2 x t0 or 3 x t0

Figure 2 : Pulse Train Timing (ref. to fOSC = 400kHz)

t B (bit duration)

t PW

tM

t MH

t ML

1st bit

2nd bit

t W (word distance)

last bit

Mode

A

B

t0 (ms)

2.52

2.88

tM (µs)

30

30

Mode A and B

tOSC

tM

tML

tMH

2.5µs

12 x tOSC

8 x tOSC

4 x tOSC

Mode A

tPW (15 x tM) + tMH

t0

1008 x tOSC

tW

34416 x tOSC

Mode B

tPW (11 x tM) + tMH

t0

1152 x tOSC

tW

55296 x tOSC

tMH (µs)

10

10

tML (µs)

20

20

oscillation period

modulation period

modulation period LOW

modulation period HIGH

modulated pulse

basic unit of pulse distance

word distance

modulated pulse

basic unit of pulse distance

word distance

tW (ms)

86.04

138

5/8

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