ST16C554

串口芯片文档 ST16C554

JUNE 2006

ST16C554

ST16C554/554D

REV. 4.0.1

2.97V TO 5.5V QUAD UART WITH 16-BYTE FIFO

GENERAL DESCRIPTION

FEATURES

The ST16C554/554D (554) is a quad Universal Pin-to-pin compatible with the industry standard

ST16C454, ST68C454, ST68C554, TI’s Asynchronous Receiver and Transmitter (UART) with

TL16C554A and Philips’ SC16C554B16 bytes of transmit and receive FIFOs, selectable

receive FIFO trigger levels and data rates of up to 1.5 Intel or Motorola Data Bus Interface selectMbps. Each UART has a set of registers that provide

the user with operating status and control, receiver Four independent UART channelserror indications, and modem serial interface ■Register Set Compatible to 16C550controls. An internal loopback capability allows

■Data rates of up to 1.5 Mbps at 5 V

onboard diagnostics. The 554 is available in a 64-pin

■Data rates of up to 500 Kbps at 3.3VLQFP and a 68-pin PLCC package. The 64-pin

■16 byte Transmit FIFOpackage only offers the 16 mode interface, but the

68-pin package offers an additional 68 mode ■16 byte Receive FIFO with error tagsinterface which allows easy integration with Motorola

■4 Selectable RX FIFO Trigger Levels

processors. The ST16C554CQ64 (64-pin) offers

three state interrupt output while the ■Full modem interface

ST16C554DCQ64 provides continuous interrupt 2.97V to 5.5V supply operationoutput. The 554 combines the package interface

modes of the 16C554 and 68C554 on a single Crystal oscillator or external clock inputintegrated chip.APPLICATIONS

Portable Appliances

Telecommunication Network Routers Ethernet Network Routers Cellular Data Devices

Factory Automation and Process Controls

FIGURE 1. ST16C554 BLOCK DIAGRAM

ST16C554

Exar Corporation 48720 Kato Road, Fremont CA, 94538 (510) 668-7000 FAX (510) 668-7017 http://www.mianfeiwendang.com

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