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CP2120

SPI TO I2C BRIDGE AND GPIO PORT EXPANDER

Silicon Laboratories 

CP2120

S P I TO I 2C B RIDGE AND G P I O P ORT E XPANDER

Single Chip SPI to I2C Transfer

Integrated clock; no external clock required

On-Chip Voltage Monitor

Slave Serial Peripheral Interface (SPI)

Up to 1.0 Mbit/s Transfers

Configurable to Least Significant Bit or Most Significant

Bit first byte transfers

I2C Master Interface

Operates at configurable rates up to 400 kHz

255 RX and TX Data Buffers

Input and Output Port Pins

8 Pins Configurable as Push-Pull or Open-Drain

1 Pin Configurable as an edge-triggered interrupt

source

All pins 5 V Tolerant

INT active low interrupt pin

Supply Voltage of 2.7 V to 3.6 V

Typical operating current: 6.4 mA

Package

Pb-free 20-pin QFN

MISO

MOSI

SCK

CS

Voltage

Monitor

SPI

Interface

Internal

Oscillator

Controller

I2C

Interface

Internal Registers

Port Controller

SDA

SCL

Eight I/O Pins Edge-Triggered

Interrupt Source

Figure 1. Block Diagram

Rev. 1.0

Copyright © 2015 by Silicon Laboratories

CP2120

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