CHAPTER 1 OVERVIEW
User’s Manual U16898EJ3V0UD
19
1.6 Block Diagram
78K0S
CPU
core
Internal
high-speed
RAM
Flash
memory
V
SS
Note
V
DD
TOH1/P42
Port 2
P20 to P23
4
Port 4
P40 to P45
6
Port 13
P130
Power on clear/
low voltage
indicator
POC/LVI
control
Reset control
Port 3
P30, P31
2
P34
P121 to P123
3
Port 12
System control
High-speed
internal oscillator
RESET/P34
X1/P121
X2/P122
Low-speed
internal oscillator
INTP0/P30
INTP1/P43
INTP2/P31
INTP3/P41
ANI0/P20 to
ANI3/P23
4
A/D converter
AV
REF
8-bit timer 80
Watchdog timer
8-bit timer H1
16-bit timer/event
counter 00
TO00/TI010/P31
TI000/P30
RxD6/P44
TxD6/P43
Serial interface
UART6
Interrupt control
Note
In the 78K0S/KA1+, V
SS
functions alternately as the ground potential of the A/D converter. Be sure to
connect V
SS
to a stabilized GND (= 0 V).