APPENDIX
REV.-A
A.1.1.1 CPU µPD7810HG (5B)
The µPD7810/7811HG is comprised of an 8-bit timer counter, an 8-bit A/D converter, 256 bytes of RAM,
and a serial interface. A system can be constructed easily with this IC, whose main features are listed below.
l
256 bytes of built-in RAM (addresses FF00-FFFF hex.)
0
4096 bytes mask ROM (addresses 0-0FFF hex.) for the 7811 CPU
0
Direct addressing of up to 64K
0
8-bit A/D converter
l
158 instructions
l
0.8 µs instruction cycle (15 MHz)
l
16-bit event counter
0 Two 8-bit timer counters
0
3 external and 8 internal interrupts (6 priority levels and 6 interrupt addresses)
0
General-purpose serial interface (asynchronous, synchronous, and l/O modes)
0
I/O line (7811: 40-bit I/O port; 7810: 24bit edge detection, 4 inputs)
0
Zero cross detection
0 Standby function
l
Built-in clock pulse circuit
. NMOS
Figures A-1 and A-2 illustrate the 7810/7811HG microprocessor; Tables A-2 through A-5 describe its functions.
PA0
PA1
PA2
PA3
PA4
PA5
PA6
PA7
PBO
PB1
PB2
PB3
PB4
PB5
PB6
PB7
PC0
PC1
PC2
PC3
PC4
PC5
PC6
PC7
NM1
INT1
I
229
43
42
41
40
z:
z:
35
34
VSS
32 33
VCC
VDD
PD7
PD6
PD5
PD4
PD3
PD2
PD1
PD0
PF7
PF6
PF5
PF4
PF3
PF2
PF1
PF0
ALE
WR
RD
AVCC
VAREF
AN7
AN6
AN5
AN4
AN3
AN2
AN1
AN0
AV
II
Figure A-l. µPD7810/7811 Pin Diagram
A-2
LQ-510
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