(UPD78F082xA) 8-bit Single-Chip Microcontroller

www.DataSheet4U.com Preliminary User’s Manual µPD780828A Subseries 8-bit Single-Chip Microcontroller µPD780824A µPD780826A µPD780828A µPD78F0828A Document No. U16504EE1V1UD00 Date Published January 2003  NEC Corporation 2003 Printed in Germany www.DataSheet4U.com NOTES FOR CMOS DEVICES 1 PRECAUTION AGAINST ESD FOR SEMICONDUCTORS Note: Strong electric field, when exposed to a MOS device, can cause destruction of the gate oxide and ultimately degrade the device operation. Steps must be taken to stop generation of static electricity as much as possible, and quickly dissipate it once, when it has occurred. Environmental control must be adequate. When it is dry, humidifier should be used. It is recommended to avoid using insulators that easily build static electricity. Semiconductor devices must be stored and transported in an anti-static container, static shielding bag or conductive material. All test and measurement tools including work bench and floor should be grounded. The operator should be grounded using wrist strap. Semiconductor devices must not be touched with bare hands. Similar precautions need to be taken for PW boards with semiconductor devices on it. 2 HANDLING OF UNUSED INPUT PINS FOR CMOS Note: No connection for CMOS device inputs can be cause of malfunction. If no connection is provided to the input pins, it is possible that an internal input level may be generated due to noise, etc., hence causing malfunction. CMOS devices behave differently than Bipolar or NMOS devices. Input levels of CMOS devices must be fixed high or low by using a pull-up or pull-down circuitry. Each unused pin should be connected to VDD or GND with a resistor, if it is considered to have a possibility of being an output pin. All handling related to the unused pins must be judged device by device and related specifications governing the devices. 3 STATUS BEFORE INITIALIZATION OF MOS DEVICES Note: Power-on does not necessarily define initial status of MOS device. Production process of MOS does not define the initial operation status of the device. Immediately after the power source is turned ON, the devices with reset function have not yet been initialized. Hence, power-on does not guarantee out-pin levels, I/O settings or contents of registers. Device is not initialized until the reset signal is received. Reset operation must be executed immediately after power-on for devices having reset function. 2 User’s Manual U16504EE1V1UD00 www.DataSheet4U.com • The information in this document is current as of 28.01, 2003. The information is subject to change without notice. For actual design-in, refer to the latest publications of NEC Electronics data sheets or data books, etc., for the most up-to-date specifications of NEC Electronics products. Not all products and/or types are available in every country. Please check with an NEC sales representative for availability and additional information. 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Electron Devices Division Guarulhos, Brasil Tel: 55-11-6465-6810 Fax: 55-11-6465-6829 4 User’s Manual U16504EE1V1UD00 www.DataSheet4U.com Preface Readers This manual has been prepared for engineers who want to understand the functions of the µPD780828A Subseries and design and develop its application systems and programs. µPD780828A Subseries: µPD780824A(A), µPD780826A(A), µPD780828A(A), µPD78F0828A(A), µPD780824A(A1), µPD780826A(A1), µPD780828A(A1), µPD780824A(A2), µPD780826A(A2), µPD780828A(A2) Purpose This manual is intended for users to understand the functions of the µPD780828A Subseries. The µPD780828A subseries manual is separated into two parts: this manual and the instruction edition (common to the 78K/0 series). Organization µPD780828A Subseries This Manual 78K/0 series User’s Manual Instruction • • • • Pin functions Internal block functions Interrupt Other on-chip peripheral functions • CPU functions • Instruction set • Explanation of each instruction How to Read This Manual Before reading this manual, you should have general knowledge of electric and logic circuits and microcontrollers. • When you want to use this manual as the manual for (A) products, (A1) products, and (A2) products: → Only the quality grade differs between (A), (A1) and (A2) products. Read the part number as follows: µPD780824A → µPD780824A(A), µPD780824A(A1), µPD780824A(A2) µPD780826A → µPD780826A(A), µPD780826A(A1), µPD780826A(A2) µPD780828A → µPD780828A(A), µPD780828A(A1), µPD780828A(A2) µPD78F0828A → µPD78F0828A(A) • When you want to understand the function in general: → Read this manual in the order of the contents. • How to interpret the register format: → For the bit number en