µPD178023, 178024
CONTENTS
1. PIN FUNCTION LIST ...................................................................................................................... 11
1.1 Port Pins................................................................................................................................. 11
1.2 Pins Other Than Port Pins ................................................................................................... 12
1.3 I/O Circuits of Pins and Recommended Connections of Unused Pins......................... 13
2. MEMORY SPACE ............................................................................................................................ 16
2.1 Memory Size Select Register (IMS) .................................................................................... 17
2.2 Internal Extension RAM Size Select Register (IXS) ......................................................... 18
3. FEATURES OF PERIPHERAL HARDWARE FUNCTIONS .......................................................... 19
3.1 Ports........................................................................................................................................ 19
3.2 Clock Generation Circuit ..................................................................................................... 20
3.3 Timers ..................................................................................................................................... 20
3.4 Buzzer Output Control Circuit............................................................................................. 22
3.5 A/D Converter ........................................................................................................................ 23
3.6 Serial Interface ...................................................................................................................... 24
3.7 PLL Frequency Synthesizer ................................................................................................ 26
3.8 Frequency Counter ............................................................................................................... 27
4. INTERRUPT FUNCTION................................................................................................................. 28
5. STANDBY FUNCTION .................................................................................................................... 31
6. RESET FUNCTION ......................................................................................................................... 31
7. INSTRUCTION SET ........................................................................................................................ 32
8. ELECTRICAL SPECIFICATIONS................................................................................................... 35
9. PACKAGE DRAWING..................................................................................................................... 44
10. RECOMMENDED SOLDERING CONDITIONS ............................................................................. 46
APPENDIX A. DEVELOPMENT TOOLS............................................................................................. 47
APPENDIX B. RELATED DOCUMENTS ............................................................................................ 49
10
Data Sheet U14126EJ1V0DS00
NEC [ NEC ]
