7220 Datasheet, PDF (8/303 Pages) Renesas Technology Corp – 8-BIT SINGLE-CHIP MICROCOMPUTER

Table of contents
Table of contents
2.7 Serial I/O ............................................................................................................................... 2-40
2.7.1 Structure of serial I/O ................................................................................................. 2-40
2.7.2 Serial I/O register (address 00DD16) ......................................................................... 2-42
2.7.3 Clock source generating circuit ................................................................................. 2-42
2.7.4 Serial input/output common transmission/reception mode ..................................... 2-42
2.7.5 Serial I/O data receive method (when an internal clock is selected) .................. 2-43
2.7.6 Serial I/O data transmit method (when an external clock is selected) ................ 2-44
2.7.7 Note when selecting a synchronous clock ............................................................... 2-45
2.8 Multi-master I²C-BUS interface ......................................................................................... 2-47
2.8.1 Construction of multi-master I²C-BUS interface ....................................................... 2-48
2.8.2 Multi-master I²C-BUS interface-related registers ..................................................... 2-49
2.8.3 START condition, STOP condition generation method ........................................... 2-58
2.9 A-D comparator ................................................................................................................... 2-61
2.10 PWM ..................................................................................................................................... 2-63
2.10.1 8-bit PWM registers (addresses 00D016 to 00D416 and 00F616)
/DA registers (addresses 00CE16 and 00CF16) .................................................... 2-64
2.10.2 14-bit PWM (DA output) ........................................................................................... 2-65
2.10.3 8-bit PWM (PWM0 to PWM5: address 00D016 to 00D416 and 00F616 ) ............. 2-67
2.10.4 14-bit PWM output control ........................................................................................ 2-69
2.10.5 8-bit PWM output control .......................................................................................... 2-70
2.11 CRT display function ....................................................................................................... 2-71
2.11.1 Display position .......................................................................................................... 2-74
2.11.2 Character size ............................................................................................................ 2-77
2.11.3 Memory for display .................................................................................................... 2-78
2.11.4 Color registers ............................................................................................................ 2-82
2.11.5 Multiline display ......................................................................................................... 2-84
2.11.6 Character border function ......................................................................................... 2-85
2.11.7 CRT output pin control ............................................................................................. 2-86
2.11.8 Raster coloring function ............................................................................................ 2-87
2.11.9 Clock for display ........................................................................................................ 2-88
2.12 ROM correction function ................................................................................................. 2-89
2.13 Software runaway detect function ................................................................................ 2-90
2.14 Low-power dissipation mode ......................................................................................... 2-91
2.14.1 Stop mode .................................................................................................................. 2-91
2.14.2 Wait mode .................................................................................................................. 2-93
2.14.3 Interrupts in low-power dissipation mode ............................................................... 2-93
2.15 Reset .................................................................................................................................... 2-95
2.15.1 Reset operation .......................................................................................................... 2-95
2.15.2 Internal state immediately after reset ..................................................................... 2-96
2.15.3 Notes for poweron reset ........................................................................................... 2-99
2.16 Clock generating circuit ................................................................................................ 2-100
2.17 Oscillation circuit ............................................................................................................ 2-101
CHAPTER 3. ELECTRICAL CHARACTERISTICS
3.1 Electrical characteristics ..................................................................................................... 3-2
3.2 Standard characteristics...................................................................................................... 3-6
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7220 Group User’s Manual