REV.-A
A.1.l
CPU KPD781OHG
The wPD78 10/781 1 is an 8-bit CPU and includes two 8 bit timer counters, an 8-bit A/D converter, 256
bytes of RAM, and a serial interface. A system can be easily constructed using this
IC.
The main features
of this
IC
are as follows.
● 256 bytes built-in RAM (addresses FFOOH-FFFFH)
● 4096 bytes maks ROM (addresses
O-FFOOH)
for the 7811 CPU
● Direct addressing of up to 64K bytes
. 8-bit A/D converter
● 158 instructions
● 0.8
KS
instruction cycle (15 MHz)
● 16-bit event counter
● Two 8-bit timer counters
● 3 external and 8 internal interrupts; 6 priority levels and 6 interrupt addresses.
● General purpose serial interface (asynchronous, synchronous, and
1/0 modes)
●
1/0 line (781 1 :40-bit 1/0 port; 78 10:24-bit edge detection, 4 inputs)
● Zero corss detection
● Standby function
● Built-in clock pulse circuit
● NMOS
Figures A-1 and A-2 illustrate the 78 10/781
1
HG microprocessor, and Tables A-3 through A-6 describe
its functions.
PAO
PA 1
PA2
PA3
PA4
PAS
PA6
PA7
PBO
Pal
P82
PB3
PB4
PBS
PB6
P87
Pco
Pcl
PC2
PC3
P124
Pcs
PC6
PC7
ml
INT 1
5
~
6
—
7
—
8
~
9
—
10
—
11
—
12
—
13
—
14
—
15
—
16
—
17
~
18
~
—
H
—
21
— 22
— 23
—
—
::
~
26
MODE 1
RESET
u
:;
%
MOOEO
29
36
x2
30
xl
31
X
v
Ss
32
33
vu
Voo
PD7
P06
P05
P04
PD3
P02
Pol
Poo
PF7
PF6
PF5
PF4
PF3
PF2
PF 1
PFO
ALE
G
m
AVCC
VAREF
AN7
AN6
AN5
AN4
AN3
AN2
AN]
ANO
AV
ss
L
Figure A-1. KPD7810/7811 Pin Diagram
A-2
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