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SCC2698B Dataheets PDF



Part Number SCC2698B
Manufacturers NXP
Logo NXP
Description Enhanced octal universal asynchronous receiver/transmitter Octal UART
Datasheet SCC2698B DatasheetSCC2698B Datasheet (PDF)

www.DataSheet4U.com INTEGRATED CIRCUITS SCC2698B Enhanced octal universal asynchronous receiver/transmitter (Octal UART) Product specification Supersedes data of 1998 Sep 04 2000 Jan 31 Philips Semiconductors Philips Semiconductors www.DataSheet4U.com Product specification Enhanced octal universal asynchronous receiver/transmitter (Octal UART) SCC2698B DESCRIPTION The SCC2698B Enhanced Octal Universal Asynchronous Receiver/Transmitter (Octal UART) is a single chip MOS-LSI communications .

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www.DataSheet4U.com INTEGRATED CIRCUITS SCC2698B Enhanced octal universal asynchronous receiver/transmitter (Octal UART) Product specification Supersedes data of 1998 Sep 04 2000 Jan 31 Philips Semiconductors Philips Semiconductors www.DataSheet4U.com Product specification Enhanced octal universal asynchronous receiver/transmitter (Octal UART) SCC2698B DESCRIPTION The SCC2698B Enhanced Octal Universal Asynchronous Receiver/Transmitter (Octal UART) is a single chip MOS-LSI communications device that provides eight full-duplex asynchronous receiver/transmitter channels in a single package. It is fabricated with CMOS technology which combines the benefits of high density and low power consumption. The operating speed of each receiver and transmitter can be selected independently as one of 26 fixed baud rates, a 16X clock derived from a programmable counter/timer, or an external 1X or 16X clock. The baud rate generator and counter/timer can operate directly from a crystal or from external clock inputs. The ability to independently program the operating speed of the receiver and transmitter make the Octal UART particularly attractive for dual-speed channel applications such as clustered terminal systems. The receiver is quadruple buffered to minimize the potential of receiver overrun or to reduce interrupt overhead in interrupt driven systems. In addition, a handshaking (RTS/CTS) capability is provided to disable a remote UART transmitter when the receiver buffer is full. The UART provides a power-down mode in which the oscillator is frozen but the register contents are stored. This results in reduced power consumption on the order of several magnitudes. The Octal UART is fully TTL compatible and operates from a single +5V power supply. The SCC2698B is an upwardly compatible version of the 2698A Octal UART. In PLCC packaging, it is enhanced by the addition of receiver ready or FIFO full status outputs, and transmitter empty status outputs for each channel on 16 multipurpose I/O pins. The multipurpose pins of the 2698B RIO pins, thus DMA and modem control is provided. FEATURES • Eight full-duplex independent asynchronous receiver/transmitters • Quadruple buffered receiver data register • Programmable data format: – 5 to 8 data bits plus parity – Odd, even, no parity or force parity – 1, 1.5 or 2 stop bits programmable in 1/16-bit increments • Baud rate for the receiver and transmitter selectable from: – 26 fixed rates: 50 to 38.4K baud Non-standard rates to 115.2K baud – User-defined rates from the programmable counter/timer associated with each of four blocks – External 1x or 16x clock Parity, framing, and overrun error detection False start bit detection Line break detection and generation Programmable channel mode – Normal (full-duplex), automatic echo, local loop back, remote loopback Four multi-function programmable 16-bit counter/timers Four interrupt outputs with eight maskable interrupting conditions for each output Receiver ready/FIFO full and transmitter ready status available on 16 multi-function pins in PLCC package On-chip crystal oscillator TTL compatible Single +5V power supply with low power mode Eight multi-purpose output pins Sixteen multi-purpose I/O pins Sixteen multi-purpose Input pins with pull-up resistors • • • • • • • • • • • • • ORDERING INFORMATION COMMERCIAL PACKAGES VCC = +5V +5%, TA = 0°C to +70°C INDUSTRIAL VCC = +5V +5%, TA = –40°C to +85°C DWG # SOT189-3 84-Pin Plastic Leaded Chip Carrier (PLCC) SCC2698BC1A84 SCC2698BE1A84 NOTE: Pin Grid Array (PGA) package version is available from Philips Components Military Division. ABSOLUTE MAXIMUM RATINGS1 SYMBOL TA TSTG VCC VS PD PARAMETER Operating ambient temperature range2 Storage temperature range Voltage from VDD to GND3 Voltage from any pin to ground3 Power dissipation RATING Note 4 –65 to +150 –0.5 to +7.0 –0.5 to VCC +0.5 1 UNIT oC oC V V W NOTES: 1. Stresses above those listed under Absolute Maximum Ratings may cause permanent damage to the device. This is a stress rating only and functional operation of the device at these or any other condition above those indicated in the operation section of this specification is not implied. 2. For operating at elevated temperatures, the device must be derated based on +150°C maximum junction temperature. 3. This product includes circuitry specifically designed for the protection of its internal devices from damaging effects of excessive static charge. Nonetheless, it is suggested that conventional precautions be taken to avoid applying any voltages larger than the rated maxima. 4. Parameters are valid over specified temperature range. See ordering information table for applicable temperature range and operating supply range. 2000 Jan 31 2 853-1127 23062 Philips Semiconductors www.DataSheet4U.com Product specification Enhanced octal universal asynchronous receiver/transmitter (Octal UART) SCC2698B PIN CONFIGURATIONS VCC 1 X2 2 64 RxDa 63 TxDa 62 RxDc 61 TxDc 60 RxDe 59.


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