HD64F3437TF16 Datasheet, PDF (18/752 Pages) Hitachi Semiconductor – 12 V must not be applied to the S-mask model (single-power-supply specification), as this may permanently damage the device.

Section 7 I/O Ports ............................................................................................................. 101
7.1 Overview............................................................................................................................ 101
7.2 Port 1.................................................................................................................................. 104
7.2.1 Overview............................................................................................................... 104
7.2.2 Register Configuration and Descriptions.............................................................. 105
7.2.3 Pin Functions in Each Mode ................................................................................. 107
7.2.4 Input Pull-Up Transistors...................................................................................... 109
7.3 Port 2.................................................................................................................................. 110
7.3.1 Overview............................................................................................................... 110
7.3.2 Register Configuration and Descriptions.............................................................. 111
7.3.3 Pin Functions in Each Mode ................................................................................. 113
7.3.4 Input Pull-Up Transistors...................................................................................... 115
7.4 Port 3.................................................................................................................................. 116
7.4.1 Overview............................................................................................................... 116
7.4.2 Register Configuration and Descriptions.............................................................. 117
7.4.3 Pin Functions in Each Mode ................................................................................. 119
7.4.4 Input Pull-Up Transistors...................................................................................... 120
7.5 Port 4.................................................................................................................................. 121
7.5.1 Overview............................................................................................................... 121
7.5.2 Register Configuration and Descriptions.............................................................. 122
7.5.3 Pin Functions ........................................................................................................ 124
7.6 Port 5.................................................................................................................................. 126
7.6.1 Overview............................................................................................................... 126
7.6.2 Register Configuration and Descriptions.............................................................. 126
7.6.3 Pin Functions ........................................................................................................ 128
7.7 Port 6.................................................................................................................................. 129
7.7.1 Overview............................................................................................................... 129
7.7.2 Register Configuration and Descriptions.............................................................. 129
7.7.3 Pin Functions ........................................................................................................ 132
7.7.4 Input Pull-Up Transistors...................................................................................... 134
7.8 Port 7.................................................................................................................................. 135
7.8.1 Overview............................................................................................................... 135
7.8.2 Register Configuration and Descriptions.............................................................. 135
7.9 Port 8.................................................................................................................................. 136
7.9.1 Overview............................................................................................................... 136
7.9.2 Register Configuration and Descriptions.............................................................. 137
7.9.3 Pin Functions ........................................................................................................ 139
7.10 Port 9.................................................................................................................................. 141
7.10.1 Overview............................................................................................................... 141
7.10.2 Register Configuration and Descriptions.............................................................. 142
7.10.3 Pin Functions ........................................................................................................ 144
7.11 Port A ................................................................................................................................. 146
7.11.1 Overview............................................................................................................... 146
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