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UPD17708 Datasheet(PDF) 220 Page - NEC |
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UPD17708 Datasheet(HTML) 220 Page - NEC |
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220 / 356 page ![]() 220 µPD17704, 17705, 17707, 17708, 17709 Table 16-2. Status of Each Pin Set by Control Flag Serial input General-purpose output port General-purpose output port General-purpose I/O port General-purpose I/O port General-purpose I/O port General-purpose I/O port General-purpose I/O port General-purpose I/O port General-purpose I/O port General-purpose I/O port Serial output Serial input General-purpose output port Serial input General-purpose output port General-purpose input port General-purpose input port General-purpose output port Serial output General-purpose output port Serial output External clock Internal clock General-purpose output port External clock Internal clock General-purpose output port External clock Internal clock 0 1 0 1 0 1 0 1 1 0 1 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 P 0 A B I O 3 S I O 0 C H S I O 0 M S S I O 0 T X S B P 0 A B I O 2 P 0 A B I O 1 P 0 A B I O 0 P 0 A B I O 0 Pin setting status Pin name Pin Each Flag Communication mode Clock direction Serial I/O 00 P0A3/SDA P0A2/SCL P0A1/SCK0 P0A0/SO0 P0B3/SI0 P0A3/SDA P0A2/SCL P0A1/SCK0 P0A0/SO0 P0B3/SI0 P0A0/SO0 P0B3/SI0 P0A0-P0A3, P0B3 P0A3/SDA P0A2/SCL P0A1/SCK0 Input (reception) Output (transmission) Input (reception) Output (transmission) General-purpose port Output (transmission) External (slave) (internal) (master) External (slave) Internal (master) External (slave) Internal (master) 2-wire serial I/O I2C bus 3-wire serial I/O Not used as serial I/O0 |
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