ZDP323B Series Digital PIR Sensor

Product Specification

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PS041703-0324 - Preliminary

Page 7

9.4

Writing to the Configuration Register

The Configuration Register data consists of 56 bits and controls the operation of the Digital

PIR Sensor. The device can support either a 10-bit I2C transaction or a 7-bit General Call

transaction. Both transaction types are shown in the following figures.

The configuration register bits are sent to the sensor directly after sending the slave

address (or General Call Address). No internal device addressing is required. Configuration

bits are sent sequentially starting with bit 55 (Most Significant Bit first).

If the configuration register is not set after power on, the default values are applied for

Detection Threshold, Digital band pass filter step and Digital band pass filter type.

See Table 4 for configuration register bit definitions and default values.

SDA (Pin 1)

SCL (Pin 3)

SDA (Pin 1)

SCL (Pin 3)

Start

0

0

0

0

0

SA6 SA5 SA4 SA3 SA2 SA1 SA0

0

0

Slave Address (7-bit)

W

ACK

0

0

0

0

0

B55 B54 B53 B52 B51 B50 B49

0

0

Register Data

B48

0

ACK

0

0

0

0

B47 B46 B45 B43

Register Data

Stop

ACK

0

0

0

0

0

B7

B6

B5

B4

B3

B2

B1

0

0

Register Data

B0

0

ACK

0

0

0

B13 B12 B11 B10

B9

0

0

Register Data

B8

0

Figure 9 - Configuration Register Write (7-bit Address)

SDA (Pin 1)

SCL (Pin 3)

SDA (Pin 1)

SCL (Pin 3)

Start

1

1

1

1

0

1

1

1

1

0

SA9 SA8

1

1

Slave Address (Upper 2-bits)

W

ACK

0

0

0

0

0

SA7 SA6 SA5 SA4 SA3 SA2 SA1

X

X

Slave Address (Lower 8-bits

SA0

X

ACK

0

0

0

0

B55 B54 B53 B52

Register Data

Stop

ACK

0

0

0

0

0

B7

B6

B5

B4

B3

B2

B1

0

0

Register Data

B0

0

ACK

0

0

0

B13 B12 B11 B10

B9

0

0

Register Data

B8

0

Figure 10 - Configuration Register Write (10-bit Address)