Rev. 1.20

16

June 17, 2016

HT7M2126/27/36/56/76

Bit 3~0

EEADD3~EEADD0: EEPROM Address

Note:0000~1111Addressesforcustomdefined.

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(0x04);

// Write EEPROM Register

i2c_write(0x05);

// Write data(Write mode,Write address 0x05)

i2c_write(0xAA);

// Write data(Write data 0xAA)

i2c_stop();

// send STOP command

i2c_start();

// send START command

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

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

i2c_write(0x04);

// Write EEPROM Register

i2c_write(0x25);

// Write data(Read mode,read address 0x05)

i2c_write(0x00);

// Write data(Write any data will not affect result)

i2c_stop();

i2c_start();

// send START command

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

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

i2c_write(0x04);

// Write EEPROM 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 = 0x25)

// and Send ACK bit

LowerByte = i2c_read(NAK);

// READ 8 bits (LowerByte = 0xAA)

// and Send NAK bit

5. PIR RAW DATA

• PIR A/D CONVERSION RAW DATA → ADDRESS: 05H

Bit

15

14

13

12

11

10

9

8

Name

—

—

—

—

PirRAW11 PirRAW10

PirRAW9

PirRAW8

R/W

—

—

—

—

R

R

R

R

Bit

7

6

5

4

3

2

1

0

Name

PirRAW7

PirRAW6

PirRAW5

PirRAW4

PirRAW3

PirRAW2

PirRAW1

PirRAW0

R/W

R

R

R

R

R

R

R

R

Bit 15~12

Unimplemented read as 0

Bit 11~0

PirRAW11~PirRAW0: Pir Signal A/D Conversion Raw data

Note:Canbeusedfordevelopedrecognitionalgorithmsorforcustomdefinerecognitionfunction.

Recommended polling time is greater than 4ms.

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(0x05);

// Write PIRRAW Register

i2c_start();

// send Repeat START command

i2c_write(AddressByte | 0x01);

// READ Command

// also, make sure bit 0 is set ‘1’