23
CHAPTER 1 OUTLINE
1.1 Features
•
Internal memory
Item
Program Memory
Data Memory
Part Number
(ROM/Flash Memory)
Internal High-Speed RAM
LCD Display RAM
EEPROM
TM
µ
PD780973(A)
24 Kbytes
768 bytes
20
×
4 bits
256 bytes
µ
PD78F0974
32 Kbytes
1024 bytes
•
High-speed instruction execution time (0.24
µ
s: @ 8.38-MHz operation with main system clock)
•
Instruction set suited to system control
• Bit manipulation possible in all address spaces
• Multiply and divide instructions
•
Fifty-six I/O ports : (including pins that have an alternate function as segment signal output)
•
LCD controller/driver
• Segment signal output :
20 max.
• Common signal output :
4 max.
• Bias
:
1/3 bias
• Power supply voltage
:
V
LCD
= 3.0 V to V
DD
•
8-bit resolution A/D converter : 5 channels
•
Serial interface
:
2 channels
• 3-wire serial I/O mode :
1 channel
• UART mode
:
1 channel
•
Timer : Six channels
• 16-bit timer
:
1 channel
• 8-bit timer
:
1 channel
• 8-bit timer/event counter :
2 channels
• Watch timer
:
1 channel
• Watchdog timer
:
1 channel
•
Meter controller/driver : PWM output (8-bit resolution) : 16
: Can set pulse width with a precision of 8 + 1 bits with 1-bit addition function
•
Sound generator : 1 channel
•
Vectored interrupt sources : 21
•
Power supply voltage : V
DD
= 5 V
±
10%
1.2 Applications
Automobile meter (dash board) control
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