NEC switch - Block Diagram

CHAPTER 1 GENERAL
User’s Manual U12978EJ3V0UD
26
1.6 Block Diagram
Key return 0
8-bit timer 00
8-bit timer/event
counter 01
Watchdog timer
Regulator
USB
function 0
Serial
interface 1
Interrupt
control
Port 0
Port 1
Port 2
Port 4
System control
78K/0S
CPU
core
ROM
Flash
memory
RAM
P00 to P07
P10 to P17
P20 to P26
P40 to P47
RESET
X1
X2
KR00 to KR07
TI01/TO01/P26/INTP0
REGC
USBDM
USBDP
SCK10/P20
SO10/P21
SI10/P22
INTP0/P26
V DD0 V DD1 V SS0 V SS1 IC
(V PP )
V REG
Remark The parenthesized values apply to the µ
PD78F9801.