UPD75P3116 Datasheet, PDF (12/60 Pages) NEC – 4-BIT SINGLE-CHIP MICROCONTROLLER

µPD75P3116
3.4 Recommended Connection of Unused Pins
Table 3-1. List of Unused Pin Connection
Pin
Recommended connection
P00/INT4
P01/SCK
P02/SO/SB0
P03/SI/SB1
Connect to Vss or VDD
Individually connect to Vss or VDD through a resistor.
Connect to Vss
P10/INT0 and P11/INT1
P12/TI1/TI2/INT2
P13/TI0
Connect to Vss or VDD
P20/PTO0
P21/PTO1
P22/PTO2/PCL
Input status : Individually connect to Vss or VDD
through a resistor
Output status : Leave open
P23/BUZ
P30/LCDCL/MD0
P31/SYNC/MD1
P32/MD2
P33/MD3
P50/D4 to P53/D7
P60/KR0/D0 to P63/KR3/D3
Connect to Vss
Input status : Individually connect to Vss or VDD through a resistor
Output status : Leave open
S0 to S15
COM0 to COM3
S16/P93 to S19/P90
Leave open
Input status : Individually connect to Vss or VDD through a resistor
S20/P83 to S23/P80
VLC0 to VLC2
BIAS
XT1 ^Note
XT2 ^Note
VPP
Output status : Leave open
Connect to Vss
Connect to Vss only when neither of VLC0, VLC1 and
VLC2 is used. In other cases, leave open.
Connect to Vss or VDD
Leave open
Always connect to VDD directly
Note In case the subsystem clock is not used, set SOS.0 = 1 (on-chip feedback
resistor not used).
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