uPD789871 Subseries 8-Bit Single-Chip Microcontrollers PUM
uPD789871 Subseries 8-Bit Single-Chip Microcontrollers PUM
uPD789871 Subseries 8-Bit Single-Chip Microcontrollers PUM
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CHAPTER 2 PIN FUNCTIONS<br />
2.3 Pin I/O Circuits and Recommended Connection of Unused Pins<br />
The I/O circuit type for each pin and recommended connection of unused pins are shown in Table 2-1.<br />
For the input/output circuit configuration of each type, see Figure 2-1.<br />
Table 2-1. Types of Pin I/O Circuits<br />
Pin Name I/O Circuit Type I/O Recommended Connection of Unused Pins<br />
P00 to P07 5-H I/O Input: Independently connect to VDD0 or VSS0 via a resistor.<br />
P10 to P12 Output: Leave open.<br />
P20/SCK10 8-C<br />
P21/SO10 5-H<br />
P22/SI10 8-C<br />
P23/INTP0<br />
P24/INTP1<br />
P25/TI<br />
FIP0 to FIP8 14-F Output Leave open.<br />
FIP9/P97 to FIP16/P90<br />
FIP17/P87 to FIP24/P80<br />
(Mask ROM version)<br />
15-G I/O<br />
FIP17/P87 to FIP24/P80 15-H<br />
(Flash memory version)<br />
RESET 2 Input —<br />
IC — — Connect directly to VSS0.<br />
VPP — —<br />
Preliminary User’s Manual U14938EJ1V0UM<br />
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