CHAPTER 2 PIN FUNCTIONS
Preliminary User’s Manual U19014EJ1V0UD
26
2.2.7 REGC
This is the pin for connecting regulator output (2.5 V) stabilization capacitance for internal operation. Connect this
pin to V
SS
via a capacitor (0.47 to 1.0
µ
F: recommended).
REGC
V
SS
Caution Keep the wiring length as short as possible for the broken-line part in the above figure.
2.2.8 USBM
This is the pin for inputting/outputting data (
−
) to USB ports.
2.2.9 USBP
This is the pin for inputting/outputting data (+) to USB ports.
2.2.10 USBPUC
This is the pin for controlling pull-up resistors connected to USB ports.
2.2.11 USBREGC
This is the pin for connecting regulator output (3.3 V) stabilization capacitance for USB ports. Connect this pin to
V
SS
via a capacitor (0.47 to 1.0
µ
F: recommended).
2.2.12 V
DD
and EV
DD
V
DD
is the positive power supply pin for P121, P122 and other than ports.
EV
DD
is the positive power supply pin for ports other than P121 and P122.
2.2.13 V
SS
and EV
SS
V
SS
is the ground potential pin for P121, P122 and other than ports.
EV
SS
is the ground potential pin for ports other than P121 and P122.
2.2.14 FLMD0
This is a pin for setting flash memory programming mode.
Connect FLMD0 to EV
SS
or V
SS
in the normal operation mode.
In flash memory programming mode, connect this pin to the flash programmer.
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