Nec switch User Manual Page 26

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CHAPTER 1 GENERAL
Users 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.
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