HT7M2136 datasheet(19/25 Pages) HOLTEK

19 / 25 page

Rev. 1.20

June 17, 2016

HT7M2126/27/36/56/76

Bit 0

Ftrg

1: PIR Trigged

0: No PIR Trigged

Note:Thisisanexampleroutine:(SeeAppendixB:“SourceCode”)

i2c_start();

// send START command

i2c_write(AddressByte & 0xFE); // WRITE Command

// also, make sure bit 0 is cleared ‘0’

i2c_write(0x08);

// Write PIRRAW Register

i2c_start();

// send Repeat START command

i2c_write(AddressByte | 0x01); // READ Command

// also, make sure bit 0 is set ‘1’

UpperByte = i2c_read(ACK);

// READ 8 bits (UpperByte = MSB)

// and Send ACK bit

LowerByte = i2c_read(NAK);

// READ 8 bits (LowerByte =LSB)

// and Send NAK bit

9. Manufacture ID

• MANUFACTURE ID (MID) → ADDRESS: 09H

Bit

Name

R/W

Bit

Name

R/W

Bit 15~0

Manufacture ID = 0x04D9

Note:Thisisanexampleroutine:(SeeAppendixB:“SourceCode”)

i2c_start();

// send START command

i2c_write(AddressByte & 0xFE); // WRITE Command

// also, make sure bit 0 is cleared ‘0’

i2c_write(0x09);

// Write MID Register

i2c_start();

// send Repeat START command

i2c_write(AddressByte | 0x01); // READ Command

// also, make sure bit 0 is set ‘1’

UpperByte = i2c_read(ACK);

// READ 8 bits (UpperByte = 0x04)

// and Send ACK bit

LowerByte = i2c_read(NAK);

// READ 8 bits (LowerByte = 0xd9)

// and Send NAK bit

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