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ST16C2550IP40 데이터시트(PDF) 1 Page - Exar Corporation |
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ST16C2550IP40 데이터시트(HTML) 1 Page - Exar Corporation |
1 / 34 page EXAR Corporation, 48720 Kato Road, Fremont, CA 94538 • (510) 668-7000 • FAX (510) 668-7017 ST16C2550 Rev. 3.20 PLCC Package DUAL UART WITH 16-BYTE TRANSMIT AND RECEIVE FIFOS DESCRIPTION The ST16C2550 (2550) is a dual universal asynchronous receiver and transmitter (UART). The ST16C2550 is an improved version of the NS16C550 UART with higher operating speed and lower access time. The 2550 provides enhanced UART functions with 16 byte FIFOs, a modem control interface, and data rates up to 1.5Mbps. Onboard 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 onboard diagnostics. Independent programmable baud rate generators are provided to select transmit and receive clock rates from 50 Bps to 1.5 Mbps. The Baud rate generator can be configured for either crystal or external clock input. The 2550 is available in a 40-pin plastic-DIP, 44-pin PLCC, and 48-pin TQFP packages. The 40 pin package does not offer TXRDY and RXRDY pins (DMA Signal monitoring). Otherwise the three package versions are the same. The 2550 is functionally compatible with the 16C2450. The 2550 is fabricated in an advanced CMOS process to achieve low drain power and high speed requirements. FEATURES • Pin and functionally compatible to ST16C2450/ Software compatible with INS8250, NS16C550 • 1.5Mbps transmit/receive operation (24MHz Max.) • 16 byte transmit FIFO to reduce the bandwidth requirement of the external CPU. • 16 byte receive FIFO with error flags to reduce the bandwidth requirement of the external CPU. • Independent transmit and receive UART control • Four selectable Receive FIFO interrupt trigger levels • Modem control signals (-CTS, -RTS, -DSR, -DTR, -RI, -CD, and Software controllable line break) • Programmable character lengths (5, 6, 7, 8) with Even, odd, or no parity • Status report register • Crystal or external clock input • 460.8 Kbps transmit/receive operation with 7.3728 MHz crystal or external clock source • TTL compatible inputs, outputs ORDERING INFORMATION Part number Pins Package Operatingtemperature ST16C2550CP40 40 PDIP 0° C to + 70° C ST16C2550CJ44 44 PLCC 0° C to + 70° C ST16C2550CQ48 48 TQFP 0° C to + 70° C 7 8 9 10 11 12 13 14 15 16 17 39 38 37 36 35 34 33 32 31 30 29 D5 D6 D7 RXB RXA -TXRDYB TXA TXB -OPB -CSA -CSB RESET -DTRB -DTRA -RTSA -OPA -RXRDYA INTA INTB A0 A1 A2 ST16C2550CJ44 Part number Pins Package Operatingtemperature ST16C2550IP40 40 PDIP -40° C to + 85° C ST16C2550IJ44 44 PLCC -40° C to + 85° C ST16C2550IQ48 48 TQFP -40° C to + 85° C |
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