PD69200 datasheet(6/20 Pages) MICROCHIP

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1.8

UART - I2C Address Selection

The choice of UART or I2C interface between the host CPU is made by applying a specific voltage level to pin #22

(I2C_ADDR_MEAS) on the PD69200. Additionally, the specific I2C address is also set by this voltage level. The

voltage is set via an external resistor as shown in the following figure.

Figure 1-3. I2C Address Selection

3.3V

PD69200 22

10K

The following table shows the specific values of R to choose UART or I2C and to set the address.

Table 1-2. I2C Address Selection for PD69200

I2C_ADDR Voltage Low

Level (V)

I2C_ADDR Voltage High

Level (V)

I2C Address

(Hexadecimal)

R1- KΩ (1%)

0.21

UART

N.C.

0.21

0.41

0x4

97.6

0.41

0.62

0x8

53.6

0.62

0.83

0xC

35.7

0.83

1.03

0x10

25.5

1.03

1.24

0x14

19.1

1.24

1.44

0x18

14.7

1.44

1.65

0x1C

11.3

1.65

1.86

0x20

8.87

1.86

2.06

0x24

6.81

2.06

2.27

0x28

5.23

2.27

2.48

0x2C

3.92

2.48

2.68

0x30

2.80

2.68

2.89

0x34

1.87

2.89

3.09

0x38

1.02

3.09

3.30

0x3C

0.324

PD69200

Architecture

Datasheet

DS00003460A-page 6

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