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ST16C452IJ68 Scheda tecnica(PDF) 1 Page - Exar Corporation |
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ST16C452IJ68 Scheda tecnica(HTML) 1 Page - Exar Corporation |
1 / 30 page EXAR Corporation, 48720 Kato Road, Fremont, CA 94538 • (510) 668-7000 • FAX (510) 668-7017 ST16C452 ST16C452PS PLCC Package DUAL UART WITH PARALLEL PRINTER PORT March 2004 DESCRIPTION The ST16C452/ST16C452PS (452/452PS) is a dual universal asynchronous receiver and transmitter (UART) with an added bi-directional parallel port that is directly compatible with a CENTRONICS type printer. The parallel port is designed such that the user can configure it as general purpose I/O interface, or for connection to other printer devices. The 452/452PS provides enhanced UART functions, a modem control interface, and data rates up to 1.5Mbps. Onboard status registers provide the user with error indications and operational status. The system interrupts and control may be tailored to meet user requirements. An internal loop-back capability allows onboard diagnostics. A programmable baud rate generator is provided to select transmit and receive clock rates from 50 bps to 1.5 Mbps. The 452/452PS is available in a 68 pin PLCC package. The 452/452PS is compatible with the 16C450. The 452 is available in two versions, the ST16C452 and the ST16C452PS. The ST16C452 provides single hardware pin to control the printer port data direction while the 452PS provides an additionally software control bit to control the printer port data direction to become compatible PS/2 operating system. The 452/452PS is fabricated in an advanced CMOS process with low power consumption. FEATURES Added features in devices with top mark date code of "F2 YYWW" and newer: • 5V Tolerant Inputs • Pin to pin and functional compatible to TL16C452 • 2.97 to 5.5 volt operation • SoftwarecompatiblewithST16C450,NS16C450 • 1.5 Mbps transmit/receive operation (24MHz) • Independent transmit and receive control • Modem and printer status registers • UART port and printer port Bi-directional • Printer port direction set by single control bit or 8 bit pattern (AA/55) • Modem control signals (-CTS, -RTS, -DSR, -DTR, -RI, -CD) • Programmable character lengths (5, 6, 7, 8) • Even, odd, or no parity bit generation and detection • Internal loop-back diagnostics • TTL compatible inputs, outputs • LowPower ORDERING INFORMATION INTB INTP -SLCTIN INIT -AUTOFDXT -STROBE GND PD0 PD1 PD2 PD3 PD4 PD5 PD6 PD7 INTA RDOUT 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 60 59 58 57 56 55 54 53 52 51 50 49 48 47 46 45 44 ST16C452CJ68 ST16C452CJ68PS TXB -DTRB -RTSB -CTSB D0 D1 D2 D3 D4 D5 D6 D7 N.C. VCC -RTSA -DTRA TXA Part number Package Operating temperature Device Status ST16C452CJ68 68-Lead PLCC 0° C to + 70° C Active ST16C452CJ68PS 68-Lead PLCC 0° C to + 70° C Active ST16C452IJ68 68-Lead PLCC -40° C to + 85° C Active ST16C452IJ68PS 68-Lead PLCC -40° C to + 85° C Active Rev. 3.20 |
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