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UPD72042 Datasheet(PDF) 1 Page - NEC |
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UPD72042 Datasheet(HTML) 1 Page - NEC |
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1 / 92 page  © 2000 DATA SHEET LSI DEVICES FOR Inter Equipment BusTM (IEBusTM) PROTOCOL CONTROL MOS INTEGRATED CIRCUIT µPD72042 The µPD72042 is a microcomputer peripheral LSI device for IEBus protocol control. The µPD72042 performs all the processing required for layers 1 and 2 of the IEBus. The devices incorporate large transmission and reception buffers, allowing the microcomputer to perform IEBus operations without interruption. They also contain an IEBus driver and receiver, allowing them to directly connected to the bus directly. FEATURES •• Control of layers 1 and 2 of the IEBus protocol • Support of a multi-master scheme • Broadcast function • Two communication modes having different transmission speeds can be selected. •• Microcomputer interface Three-/two-wire serial I/O, Transfer starting with MSB •• Program crashes can be detected by means of a watchdog timer. •• Low power consumption (standby mode): 50 µA (max) •• Oscillator frequency (fX): 6 MHz • frequency accuracy: ±1.5% •• Operating voltage: 5 V ±10% Document No. S14870EJ1V0DS00 (1st edition) Date Published June 2000 N CP(N) Printed in Japan q q Built-in IEBus driver and receiver q q Transmission and reception buffers Transmission buffer : 33 bytes, FIFO Reception buffer : 40 bytes, FIFO (capable of holding more than one frame of reception data.) ORDERING INFORMATION Part number Package µPD72042GT 16-pin plastic SOP (9.53 mm (375)) Transmission speed Mode 0 Approx. 3.9 Kbps Mode 1 Approx. 17 Kbps The information in this document is subject to change without notice. Before using this document, please confirm that this is the latest version. Not all devices/types available in every country. Please check with local NEC representative for availability and additional information. |
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