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ST16C1450CJ28 Fiches technique(PDF) 1 Page - Exar Corporation |
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ST16C1450CJ28 Fiches technique(HTML) 1 Page - Exar Corporation |
1 / 28 page Exar Corporation 48720 Kato Road, Fremont CA, 94538 • (510) 668-7000 • FAX (510) 668-7017 • www.exar.com xr ST16C1450 2.97V TO 5.5V UART AUGUST 2005 REV. 4.2.1 GENERAL DESCRIPTION The ST16C1450 is a universal asynchronous receiver and transmitter (UART). The 1450 is foot print compatible to the SSI 73M1550 and SSI 73M2550 UART with one byte FIFO and higher operating speed and lower access time. The 1450 provides enhanced UART functions with a modem control interface, independent programmable baud rate generators with clock rates to 1.5 Mbps. On board status registers provide the user with error indications and operational status. System interrupts and modem control features may be tailored by external software to meet specific user requirements. An internal loop-back capability allows on board diagnostics. The 1450 is available in a 28-pin PLCC and 48-pin TQFP packages. The baud rate generator can be configured for either crystal or external clock input. The 48-pin TQFP package provides a buffered reset output that can be controlled through user software. The 1450 is fabricated in an advanced CMOS process to achieve low drain power and high speed requirements. The ST16C1450 is not compatible with the industry standard 16450 and will not work with the standard serial port driver in MS Windows (see pages 12-13 for details). For a MS Windows compatible UART, see the ST16C450. FEATURES • Pin and functionally compatible to SSI 73M1550/ 2550 • 1 byte Transmit FIFO (THR) • 1 byte Receive FIFO with error tags (RHR) • Four levels of prioritized interrupts • Modem Control Signals (CTS#, RTS#, DSR#, DTR#, RI#, CD#) • Programmable character lengths (5, 6, 7, 8) with even, odd or no parity • Crystal or external clock input • 1.5 Mbps Transmit/Receive operation (24 MHz) with programmable clock control • Power Down Mode (50 uA at 3.3 V, 200 uA at 5 V) • Software controllable reset output • 2.97 to 5.5 Volt operation APPLICATIONS • Battery Operated Electronics • Internet Appliances • Handheld Terminal • Personal Digital Assistants • Cellular Phones DataPort FIGURE 1. BLOCK DIAGRAM XT AL 1/C LK XT AL 2 Crystal O sc/B uffer DTR#, RTS# DSR#, C TS#, CD #, R I# Data Bus Interface THR Baud Rate Generator Tran sm itter UART C onfiguration Reg s IO R # RH R R eceiver M odem Contro l Signals TX RX INT A2:A 0 D7:D 0 CS# IO W # R ESET RST |
Numéro de pièce similaire - ST16C1450CJ28 |
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Description similaire - ST16C1450CJ28 |
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