4
µ
PD78C14(A)
Block Diagram
PF7-0/AB15-8
PD7-0/AD7-0
PC7-0
PB7-0
PA7-0
8
8
8
8
8
PORT A
PORT B
PORT C
PORT D
PORT F
8
8
8
8
8
8
8
8
8
16
16
6
8
16
14
16
16
16
16
8
8
8
8
8
8
8/16
8
INST.REG
INST.
DECODER
DATA
MEMORY
(256-BYTE)
PROGRAM
MEMORY
(16 K-BYTE)
MAIN
G.R
ALT
G.R
INTERNAL DATA BUS
ALU
(8/16)
PSW
LATCH
LATCH
8
STANDBY
CONTROL
SYSTEM
CONTROL
READ/WRITE
CONTROL
V
SS
V
DD
STOP
RESET
MODE1 MODE0
ALE
WR
RD
LATCH
INC/DEC
PC
SP
EA
V
B
D
H
A
C
E
L
EA'
V'
B'
D'
H'
A'
C'
E'
L'
BUFFER
OSC
SERIAL I/O
INT.
CONTROL
TIMER
TIMER
EVENT
COUNTER
A/D
CONVERTER
X1
X2
PC0/TxD
PC1/RxD
PC2/SCK
NMI
INT1
PC3/INT2/TI
PC4/TO
PC5/CI
AV
SS
PC7/CO1
PC6/CO0
AN7-0
8
V
AREF
V
DD
Note
Note
DATA MEMORY can only be used when RAE bit of MM register is set to 1.
External memory is necessary when 0 is set.
4
*