描述 Description

The SC16IS850L is a slave I2C-bus/SPI interface to a single-channel high performance UART. It offers data rates up to 5 Mbit/s and guarantees low operating and sleeping current. The device comes in very small HVQFN24 and TSSOP24 packages, which makes it ideally suitable for handheld, battery operated applications. It also enables seamless protocol conversion from I2C-bus or SPI to and RS-232/RS-485 and are fully bidirectional.
The SC16IS850L supports SPI clock speeds up to 12 Mbit/s, and it supports IrDA SIR up to 115.2 kbit/s. Its internal register set is backward-compatible with the widely used and widely popular 16C850. This allows the software to be easily written or ported from another platform.
The SC16IS850L also provides additional advanced features such as auto hardware and software flow control, automatic RS-485 support, and software reset. This allows the software to reset the UART at any moment, independent of the hardware reset signal.

特性 Features

General featuresSingle full-duplex UART
Selectable I2C-bus or SPI interface
1.8 V operation
Industrial temperature range: -40 ℃ to +85 ℃
128 bytes FIFO (transmitter and receiver)
Fully compatible with industrial standard 16C450 and equivalent
Baud rates up to 5 Mbit/s in 16× clock mode
Auto hardware flow control using RTS/CTS
Auto software flow control with programmable Xon/Xoff characters
Single or double Xon/Xoff characters
Automatic RS-485 support (automatic slave address detection)
RS-485 driver direction control via RTS signal
RS-485 driver direction control inversion
Built-in IrDA encoder and decoder interface
Supports IrDA SIR with speeds up to 115.2 kbit/s
Software reset
Transmitter and receiver can be enabled/disabled independent of each other
Receive and Transmit FIFO levels
Programmable special character detection
Fully programmable character formatting 5-bit, 6-bit, 7-bit or 8-bit character
Even, odd, or no parity
1, 1?, or 2 stop bits
Line break generation and detection
Internal Loopback mode
Sleep current less than 5 μA at 1.8 V
Industrial and commercial temperature ranges
Available in HVQFN24 and TSSOP24 packages
I2C-bus features400 kbit/s maximum speed
Compliant with I2C-bus Fast-mode (Fm) speed
Slave mode only
SPI featuresSupports 12 Mbit/s maximum SPI clock speed
Slave mode only
SPI Mode 0