SC68C2550B

SC68C2550B Rev. 02 — 28 April 2005 www.DataSheet4U.com 5 V, 3.3 V and 2.5 V dual UART, 5 Mbit/s (max.), with 16-byte FIFOs and Motorola µP interface Product data sheet 1. General description The SC68C2550B is a two channel Universal Asynchronous Receiver and Transmitter (UART) used for serial data communications. Its principal function is to convert parallel data into serial data and vice versa. The UART can handle serial data rates up to 5 Mbit/s. The SC68C2550B provides enhanced UART functions with 16-byte FIFOs, modem control interface, DMA mode data transfer. The DMA mode data transfer is controlled by the FIFO trigger levels and the TXRDY and RXRDY signals. On-board status registers provide the user with error indications and operational status. System interrupts and modem control features may be tailored by software to meet specific user requirements. An internal loop-back capability allows on-board diagnostics. Independent programmable baud rate generators are provided to select transmit and receive baud rates. The SC68C2550B operates at 5 V, 3.3 V and 2.5 V and the industrial temperature range, and is available in a plastic LQFP48 package. 2. Features s s s s s s s s s s s s 2 channel UART with Motorola µP interface 5 V, 3.3 V and 2.5 V operation Industrial temperature range Up to 5 Mbit/s data rate at 5 V and 3.3 V, and 3 Mbit/s at 2.5 V 16-byte transmit FIFO to reduce the bandwidth requirement of the external CPU 16-byte receive FIFO with error flags to reduce the...