Datasheet

78K0/Kx2-L CHAPTER 2 PIN FUNCTIONS
R01UH0028EJ0400 Rev.4.00 52
Sep 27, 2010
2.2.9 AVREF, AVSS, VDD, VSS
These are the power supply/ground pins.
78K0/KY2-L
(
μ PD78F055x)
78K0/KA2-L
( μ PD78F056x)
78K0/KB2-L
( μ PD78F057x)
78K0/KC2-L
( μ PD78F058x)
16 Pins 20, 25, 32 Pins 30 Pins 40, 44, 48 Pins
AVREF AVREF AVREF AVREF
− −
AV
SS AVSS
VDD VDD VDD VDD
VSS VSS VSS VSS
(a) AV
REF
This is the A/D converter reference voltage input pin and the positive power supply pin of port 2 and A/D
converter.
This is also the positive power supply pin of port 7 in the 78K0/KA2-L (32 pins).
When the A/D converter is not used, connect this pin directly to V
DD
Note
.
Note Make the AV
REF pin the same potential as the VDD pin when port 2 is used as a digital port.
(b) AV
SS
This is a ground potential pin of A/D converter and port 2. Even when the A/D converter is not used, always use
this pin with the same potential as the V
SS pin.
(c) V
DD
V
DD is a positive power supply pin.
(d) V
SS
V
SS is a ground potential pin
Note
.
Note In the 78K0/KY2-L and 78K0/KA2-L, VSS functions alternately as the ground potential of the A/D converter.
Be sure to connect V
SS to a stabilized GND (= 0 V).
2.2.10 REGC, IC0, IC
This is a pin for connecting regulator output stabilization capacitance for internal operation and an internally connected
pin.
78K0/KY2-L
(
μ PD78F055x)
78K0/KA2-L
( μ PD78F056x)
78K0/KB2-L
( μ PD78F057x)
78K0/KC2-L
( μ PD78F058x)
16 Pins 20, 25 Pins 32 Pins 30 Pins 40, 44, 48 Pins
REGC REGC REGC REGC REGC
− −
IC0 IC IC
<R>
<R>
<R>