PD17P246_15 Datasheet, PDF (15/34 Pages) Renesas Technology Corp – PD17P246_15 FOR SMALL GENERAL-PURPOSE INFRARED REMOTE CONTROLLER

µPD17P246
2.4 Connection of Unused Pins
Connect the unused pins as follows.
Table 2-1. Connection of Unused Pins
Pin
P0A0 to P0A3
P0B0 to P0B3
P0C0 to P0C3
P0D0 to P0D3
P0E0 to P0E3
P1A0 to P1A2
P1B0/INT
REM
Leave open.
Recommended Connection
Connect to GND (input mode).
Connect to GND.
Leave open.
2.5 Notes on Using the RESET and INT Pins
In addition to the functions shown in 2. PIN FUNCTIONS, the RESET and INT pins also have the function of setting
a test mode (for IC testing) in which the internal operations of the µPD17P246 are tested.
When a voltage higher than VDD is applied to either of these pins, the test mode is set. This means that, even during
normal operation, the µPD17P246 may be set in the test mode if noise exceeding VDD is applied.
For example, if the wiring length of the RESET or INT pin is too long, noise superimposed on the wiring line of the pin
may cause the above problem.
Therefore, keep the wiring length of these pins as short as possible to suppress the noise; otherwise, take noise
preventive measures as shown below by using external components.
• Connect diode with low VF between VDD
and RESET/INT pin
VDD
• Connect capacitor between VDD
and RESET/INT pin
VDD
Diode with
low VF
VDD
RESET, INT
VDD
RESET, INT
Data Sheet U15215EJ1V0DS
13