描述 Description

The SC16IS752/SC16IS762 is an I2C-bus/SPI bus interface to a dual-channel high performance UART offering data rates up to 5 Mbit/s, low operating and sleeping current; it also provides the application with 8 additional programmable I/O pins. The device comes in very small HVQFN32 and TSSOP28 packages, which makes it ideally suitable for hand-held, battery-operated applications. This chip enables seamless protocol conversion from I2C-bus/SPI to RS-232/RS-485 and is fully bidirectional.
The SC16IS762 differs from the SC16IS752 in that it supports SPI clock speeds up to 15 Mbit/s instead of the 4 Mbit/s supported by the SC16IS752, and in that it supports IrDA SIR up to 1.152 Mbit/s. In all other aspects, the SC16IS762 is functionally and electrically the same as the SC16IS752.
The SC16IS752/SC16IS762’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 SC16IS752/SC16IS762 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 featuresDual full-duplex UART
I2C-bus or SPI interface selectable
3.3 V or 2.5 V operation
Industrial temperature range: -40 °C to +95 °C
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
RS-485 driver direction control via RTS signal
RS-485 driver direction control inversion
Built-in IrDA encoder and decoder supporting IrDA SIR with speeds up to 115.2 kbit/s
SC16IS762 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
5 V tolerant inputs
Available in HVQFN32 and TSSOP28 packages
I2C-bus featuresNoise filter on SCL/SDA inputs
400 kbit/s (maximum)
Compliant with I2C-bus Fast mode
Slave mode only
SPI featuresSC16IS752 supports 4 Mbit/s maximum SPI clock speed
SC16IS762 supports 15 Mbit/s maximum SPI clock speed
Slave mode only
SPI Mode 0