1.2 Features ......................................................................................................................................................... 10
1.3 Ordering Information ...................................................................................................................................... 11
1.4 Development Tools ........................................................................................................................................ 12
6. Port Structures ...................................................................................................................................................... 23
6.1 General Purpose I/O Port .............................................................................................................................. 23
6.2 External Interrupt I/O Port .............................................................................................................................. 24
7.8 DC Characteristics ......................................................................................................................................... 29
7.9 Serial I/O Characteristics ............................................................................................................................... 31
7.14 Main Clock Oscillator Characteristics .......................................................................................................... 36
7.15 Sub Clock Oscillator Characteristics ........................................................................................................... 37
7.16 Main Oscillation Stabilization Characteristics ............................................................................................. 38
7.17 Sub Oscillation Characteristics .................................................................................................................... 38
7.18 Operating Voltage Range ............................................................................................................................ 39
7.19 Recommended Circuit and Layout .............................................................................................................. 40
8.1 Program Memory ........................................................................................................................................... 44
8.2 Data Memory ................................................................................................................................................. 46
9.2 Port Register .................................................................................................................................................. 56
9.3 P0 Port ........................................................................................................................................................... 60
9.4 P1 Port ........................................................................................................................................................... 62
9.5 P2 Port ........................................................................................................................................................... 64
9.6 P3 Port ........................................................................................................................................................... 65
9.7 P4 Port ........................................................................................................................................................... 66
9.8 P5 Port ........................................................................................................................................................... 67
9.9 P6 Port ........................................................................................................................................................... 68
PS030002-0212
PRELIMINARY
1
Z51F3221
Product Specification
9.10 P7 Port ......................................................................................................................................................... 69
9.11 P8 Port ......................................................................................................................................................... 70
9.12 P9 Port ......................................................................................................................................................... 71
9.13 Port Function ............................................................................................................................................... 72
10.6 Effective Timing after Controlling Interrupt Bit ............................................................................................ 86
10.7 Multi Interrupt ............................................................................................................................................... 87
12. Power Down Operation .................................................................................................................................... 175
13.5 Power On RESET ...................................................................................................................................... 181
13.7 Brown Out Detector Processor .................................................................................................................. 185
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