Hardware

AN3299

4/13

Doc ID 18113 Rev 1

1

Hardware

1.1

External components

1.1.1

Typical application circuit

Figure 1.

Typical application schematic

Note:

Recommended connection at reset is based on the use of baseband/CPU GPIO as control

signal. Please refer to Section 1.1.2 for other recommended configurations.

SCLK and SDATA pull up must be to VCC. Pull up to voltage that is less than or greater than

VCC may result in excessive leakage current.

In a typical application, the following external components are required:

●

R1: 10 k

Ω pull-up resistor at reset

●

R2: 2.2 k

Ω-10 kΩ pull-up resistor at INT

●

R3: 2.2 k

Ω-10 kΩ pull-up resistor at SCLK

●

R4: 2.2 k

Ω-10 kΩ pull-up resistor at SDATA

●

R5: 1 M

Ω pull-up/down resistors at address

●

C1: 100 nF capacitor at VCC

●

C2: 100 nF capacitor at VIO