4524_M Datasheet, PDF (7/310 Pages) Renesas Technology Corp – 4-BIT CISC SINGLE-CHIP MICROCOMPUTER 720 FAMILY / 4500 SERIES

4524 Group
Table of contents
CHAPTER 3 APPENDIX
3.1 Electrical characteristics ........................................................................................................ 2
3.1.1 Absolute maximum ratings ............................................................................................... 2
3.1.2 Recommended operating conditions ............................................................................... 3
3.1.3 Electrical characteristics ................................................................................................... 5
3.1.4 A/D converter recommended operating conditions ....................................................... 7
3.1.5 Voltage drop detection circuit characteristics ................................................................ 8
3.1.6 Basic timing diagram ........................................................................................................ 8
3.2 Typical characteristics ............................................................................................................ 9
3.2.1 VDD–IDD characteristics ...................................................................................................... 9
3.2.2 Frequency characteristics ............................................................................................... 15
3.2.3 Port typical characteristics (VDD = 5.0 V) .................................................................... 18
3.2.4 Port typical characteristics (VDD = 3.0 V) .................................................................... 21
3.2.5 Input threshold characteristics ....................................................................................... 24
3.2.6 Pull-up resistor: VDD–RPU characteristics example .................................................... 27
3.2.7 Internal resistor for LCD power: Ta–RVLC ................................................................. 28
3.2.8 A/D converter typical characteristics ............................................................................ 29
3.2.9 Analog input current characteristics example ............................................................. 32
3.2.10 A/D converter operation current (VDD–IADD) characteristics ...................................... 36
3.2.11 Voltage drop detection circuit characteristics ........................................................... 36
3.3 List of precautions ................................................................................................................. 38
3.3.1 Program counter .............................................................................................................. 38
3.3.2 Stack registers (SKs) ...................................................................................................... 38
3.3.3 Notes on I/O port ............................................................................................................ 38
3.3.4 Notes on interrupt ........................................................................................................... 41
3.3.5 Notes on timer ................................................................................................................. 42
3.3.6 Notes on A/D conversion ............................................................................................... 43
3.3.7 Notes on serial I/O ......................................................................................................... 44
3.3.8 Notes on LCD function ................................................................................................... 45
3.3.9 Notes on reset ................................................................................................................. 45
3.3.10 Notes on voltage drop detection circuit ..................................................................... 45
3.3.11 Notes on power down .................................................................................................. 46
3.3.12 Notes on oscillation circuit ........................................................................................... 47
3.3.13 Electric characteristic differences between Mask ROM and One Time PROM version MCU ... 47
3.3.14 Notes on Power Source Voltage ................................................................................ 47
3.4 Notes on noise ........................................................................................................................ 48
3.4.1 Shortest wiring length ..................................................................................................... 48
3.4.2 Connection of bypass capacitor across VSS line and VDD line .................................. 50
3.4.3 wiring to analog input pins ............................................................................................ 51
3.4.4 Oscillator concerns .......................................................................................................... 51
3.4.5 setup for I/O ports .......................................................................................................... 52
3.4.6 providing of watchdog timer function by software ...................................................... 52
3.5 Package outline ...................................................................................................................... 54
Rev.2.00 Aug, 06 2004
iii
REJ09B0107-0200Z