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