Rev. 1.20

14

June 17, 2016

HT7M2126/27/36/56/76

// also, make sure bit 0 is set ‘1’

UpperByte = i2c_read(ACK);

// READ 8 bits

// and Send ACK bit

LowerByte = i2c_read(NAK);

// READ 8 bits

// and Send NAK bit

2. Config Module Address – Madd

• CONGIF MODULE ADDRESS → ADDRESS: 02H

Bit

15

14

13

12

11

10

9

8

Name

Lumi6

Lumi5

Lumi4

Lumi3

Lumi2

Lumi1

Lumi0

LUMIEN

R/W

R/W

R/W

R/W

R/W

R/W

R/W

R/W

R/W

Bit

7

6

5

4

3

2

1

0

Name

Madd6

Madd5

Madd4

Madd3

Madd2

Madd1

Madd0

D0

R/W

R/W

R/W

R/W

R/W

R/W

R/W

R/W

R/W

Bit 15~9

Lumi6~Lumi0

These bits define the photo transistor A/D conversion thresholds for threshold triggering of

brightness setting.

Whenthevalueislarger,environmentneedsmoredark(Default1Fh).

Bit 8

LUMIEN

1: Enable Brightness detection and make it associate with PIR detect

PIR detection will be started when the brightness less than Lumi setting which is the brightness

value of the corresponding.

0: Disable Brightness detection and make it associate with PIR detect

Bit 7~1

TheAddresscannotbechanged,mustbefixedas4Ch.

Bit 0

D0: Reserved bit.

Note: Address is MSB 7 bits, bit 0 reserved.

SCL

SDA

SCL

SDA

1

2

3

4

56

7

8

1

2

34

5

6

78

0

01

1

00

W

A

C

K

00

00

0

00

1

1

S

A

C

K

Address Byte

HT7M21xx

Configuration Pointer

HT7M21xx

1

2

3

4

56

7

8

1

2

34

5

6

78

0

0

0

0

000

A

C

K

0

1

01

0

10

P

0

A

C

K

MSB Data

HT7M21xx

LSB Data

HT7M21xx

0