描述 Description

The SC16IS740/750/760 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 SC16IS750 and SC16IS760 also provide the application with 8 additional programmable I/O pins. The device comes in very small HVQFN24, TSSOP24 (SC16IS750/760) and TSSOP16 (SC16IS740) packages, which makes it ideally suitable for handheld, battery operated applications. This family of products enables seamless protocol conversion from I2C-bus or SPI to and RS-232/RS-485 and are fully bidirectional.
The SC16IS760 differs from the SC16IS750 in that it supports SPI clock speeds up to 15 Mbit/s instead of the 4 Mbit/s supported by the SC16IS750, and in that it supports IrDA SIR up to 1.152 Mbit/s. In all other aspects, the SC16IS760 is functionally and electrically the same as the SC16IS750. The SC16IS740 is functionally and electrically identical to the SC16IS750, with the exception of the programmable I/O pins which are only present on the SC16IS750.
The SC16IS740/750/760’s internal register set is backward-compatible with the widely used and widely popular 16C450. This allows the software to be easily written or ported from another platform.
The SC16IS740/750/760 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 features
Single full-duplex UART
Selectable I2C-bus or SPI interface
3.3 V or 2.5 V operation
Industrial temperature range: -40 oC to +95 oC
64 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)
Up to eight programmable I/O pins (SC16IS750 and SC16IS760 only)
RS-485 driver direction control via RTS signal
RS-485 driver direction control inversion
Built-in IrDA encoder and decoder interface
SC16IS750 supports IrDA SIR with speeds up to 115.2 kbit/s
SC16IS760 supports IrDA SIR with speeds up to 1.152 Mbit/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 30 μA at 3.3 V
Industrial and commercial temperature ranges
Available in HVQFN24, TSSOP24 (SC16IS750/760) and TSSOP16 (SC16IS740) packages
I2C-bus features
Noise filter on SCL/SDA inputs
400 kbit/s maximum speed
Compliant with I2C-bus fast speed
Slave mode only
SPI features
SC16IS750 supports 4 Mbit/s maximum SPI clock speed
SC16IS760 supports 15 Mbit/s maximum SPI clock speed
Slave mode only
SPI Mode 0