UPD789304 Datasheet, PDF (12/64 Pages) NEC – 8-BIT SINGLE-CHIP MICROCONTROLLER

µPD789304, 789306, 789314, 789316
3.3 Pin I/O Circuits and Recommended Connection of Unused Pins
The I/O circuit type of each pin and recommended connection of unused pins are shown in Table 3-1.
For the I/O circuit configuration of each type, refer to Figure 3-1.
Table 3-1. Types of Pin I/O Circuits and Recommended Connection of Unused Pins
Pin Name
P00/KR0 to P03/KR3
P10 to P13
P20/SCK10
P21/SO10
P22/SI10
P23/SCK20/ASCK20
P24/SO20/TxD20
P25/SI20/RxD20
P26/TO20
P30/INTP0/CPT20
P31/INTP1/TO30/
TMI40
P32/INTP2/TO40
P33/INTP3
P50 to P53
S0 to S23
COM0 to COM3
VLC0 to VLC2
CAPH, CAPL
XT1
XT2
RESET
IC
I/O
Circuit Type
8-A
5-A
8-A
I/O
I/O
Recommended Connection of Unused Pins
Input: Independently connect to VDD or VSS via a resistor.
Output: Leave open.
Input: Independently connect to VSS via a resistor.
Output: Leave open.
13-W
17
18
–
–
–
2
–
Output
Input: Independently connect to VDD via a resistor.
Output: Leave open.
Leave open.
–
Input
Connect to VSS.
–
Leave open.
Input
–
–
Directly connect to VSS.
12
Data Sheet U14384EJ1V0DS