REV.-B
( C P U )
The 7810 (78 11 ) HG has the following differences from the conventional G type.
(a) Driving oscillation frequency is guaranteed up to 15 MHz.
(b) Reference voltage
(A/D converter reference voltage) is different.
For point (b), the multiplier for the
terminal’s peripheral circuit is different. Therefore, a board
with the HG type can use only HG type replacement parts. (The G type cannot be substituted.)
The
10/781 1 is an 8-bit CPU that includes two 8-bit timer counters, an 8-bit A/D
converter,
256
bytes of RAM, and a serial interface. A system can be constructed easily using this
The main features
of this
are as:
●
●
●
●
●
●
●
●
●
●
●
●
●
●
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256 bytes of built-in RAM (addresses FFOOH -
4096 bytes of mask ROM (addresses O -
for the 7811 CPU
Direct addressing of up to 64K bytes
8-bit A/D converter
158 instructions
1
instruction cycle
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
modes)
line (78 1 1: 40-bit
port; 78 10: 24 bit edge detection, 4 inputs)
Zero cross detection
Standby function
Built-in clock pulse circuit
NMOS
Figures A-1 and A-2 illustrate the 78 10/781 1
its functions.
PA
PAS
1
microprocessor,
5
6
7
9
10
12
13
14
15
17
20
21
22
25
60
5 9
5 6
5 5
54
53
50
49
48
47
46
45
44
43
42
41
40
and Tables A-2 through A-5 describe
PO 1
PF
ALE
A V
C C
A N ]
AV
SS
Fig. A-1. pPD7810/7811 Pin Diagram
A-2
