UPD784020 Datasheet, PDF (11/90 Pages) NEC – 16/8-BIT SINGLE-CHIP MICROCOMPUTER

mPD784020, 784021
5. BLOCK DIAGRAM
NMI
INTP0-INTP5
INTP3
TO0
TO1
INTP0
INTP1
INTP2/CI
TO2
TO3
P00-P03
P04-P07
PWM0
PWM1
ANO0
ANO1
AVREF2
AVREF3
ANI0-ANI7
AVDD
AVREF1
AVSS
INTP5
Programmable
interrupt controller
Timer/counter 0
(16 bits)
Timer/counter 1
(16 bits)
Timer/counter 2
(16 bits)
Timer 3
(16 bits)
Real-time output
port
PWM
D /A converter
A /D converter
78K /IV
CPU core
RAM
Watchdog timer
UART/IOE2
Baud-rate
generator
UART/IOE1
Baud-rate
generator
Clocked serial
interface
Bus interface
Port 0
Port 1
Port 2
Port 3
Port 6
Port 7
System control
RxD/SI1
TxD/SO1
ASCK/SCK1
RxD2/SI2
TxD2/SO2
ASCK2/SCK2
SCK0
SO0/SB0
SI0
ASTB
AD0-AD7
A8-A15
A16-A19
RD
WR
WAIT/HLDRQ
REFRQ/HLDAK
P00-P07
P10-P17
P20-P27
P30-P37
P60-P63
P60, P67
P70-P77
RESET
TEST
X1
X2
VDD
VSS
Remark The internal ROM or RAM capacity differs for each product.
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