RL78/F13, F14 CHAPTER 2 PIN FUNCTIONS
R01UH0368EJ0210 Rev.2.10 81
Dec 10, 2015
(2) VSS, EVSS0, EVSS1
VSS is a ground potential pin for P33, P34, P80 to P87, P90 to P97
Note
, P100 to P105, P121 to P124, P137 and the pins
other than ports.
EV
SS0 and EVSS1 are ground potential pins for ports other than P33, P34, P80 to P87, P90 to P97
Note
, P100 to P105,
P121 to P124, and P137. EV
SS1 is provided only in the 100-pin products of RL78/F14.
Note In products with 48 or fewer pins, Vss is the ground potential pin for all port pins.
In products with 64 or more pins, Vss and EVss
0 are the ground potential pins for P92 to P95 of products of
groups B to E and of group A, respectively.
In products with 64 or more pins, Vss and EVss
0 are the ground potential pins for P96 and P97 of products of
group E and of groups A to D, respectively.
Remark Use bypass capacitors (about 0.1 F) as noise and latch-up countermeasures with relatively thick wires at the
shortest distance to V
DD to VSS, EVDD0 to EVSS0 and EVDD1 to EVSS1 lines.
2.2.16 RESET
This is an active-low system reset input pin.
When the external reset pin is not used, connect this pin directly or via a resistor to V
DD.
When the external reset pin is used, design the circuit based on VDD.
2.2.17 REGC
This is the pin for connecting regulator output stabilization capacitance for internal operation. Connect this pin to VSS via
a capacitor (0.47 to 1 F).
Use a capacitor with good characteristics because it is used to stabilize internal voltage.
Caution Keep the wiring length as short as possible for the broken-line part in the above figure.
REGC
V
SS
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