PD17012_15 Datasheet, PDF (27/320 Pages) Renesas Technology Corp – 4-BIT SINGLE-CHIP MICROCONTROLLERS WITH DIGITAL TUNING SYSTEM HARDWARE

µPD17012, 17P012
1.3 Recommended Connection of Unused Pins
The following connections are recommended for unused pins.
Table 1-1. Recommended Connection of Unused Pins
Pin Name
P0D0/K0 to P0D3/K3
P1B0/ADC0
P1B1/ADC1
P1B2/AMIFC^{Notes 2, 3}
P1B3/FMIFC^{Notes 2, 3}
P1C0/P1C3
P2E0/LCD16
P2F0/LCD17
P2G0/LCD18
P2H0/LCD19
PYA0/LCD0/KS0 to
PYA15/LCD15/KS15
P0C0/PWM0
P0C1/PWM1
P0C2, P0C3
P0A0/SI1
P0A1/SO1
P0A2/SCK1
P0B0/BEEP0
P0B1/BEEP1
P0B2/FCG0^{Notes 2, 3}
P0B3/FCG1^{Notes 2, 3}
P1A0 to P1A2
P1D0 to P1D3
CE
INT^{Note 5}
VCOH, VCOL
COM0 to COM2
EO
Input
I/O Mode
Recommended Connection of Unused Pins
Independently connect to GND via a resistor^{Note 1}.
Independently connect to VDD or GND via a resistor^{Note 1}.
CMOS push-pull output
Set to P1B2 and connect to VDD or GND via a resistor^{Note 1}.
Set to P1B3 and connect to VDD or GND via a resistor^{Note 1}.
Leave open.
N-ch open-drain output
Set to low-level output by software, and leave open.
I/O^{Note 4}
Set to general-purpose input port by software, and
independently connect to VDD or GND via a resistor^{Note 1}.
Input
Output
Connect to VDD via a resistor^{Note 1}.
Connect to GND via a resistor^{Note 1}.
Disable by software, and leave open.
Leave open.
Notes 1. Note that when pulling up (connecting to VDD via a resistor) or pulling down (connecting to GND via a resistor)
a pin externally using a high resistance value, the current consumption (through current) of the port
increases because the pin approaches the high-impedance state. Generally, a resistance value of several
tens of kΩ suffices for pull up and pull down, although this value depends on each application circuit.
2. This general-purpose input port has a circuit designed so that the current consumption does not increase
even in the high-impedance state.
3. Do not set this pin to AMIFC, FMIFC, FCG0 or FCG1, or the current consumption will increase.
4. These input/output ports become general-purpose input ports at power-on, clock stop, and CE reset.
5. In the µPD17P012, the INT pin functions alternately as the VPP pin for writing or verifying the program
memory. If the INT pin is not used, directly connect to GND.
Data Sheet U10101EJ4V0DS
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