
52
CHAPTER 1
OUTLINE (
PD780024A, 780034A SUBSERIES)
User’s Manual U14046EJ3V0UD
1.9 Outline of Function
Part Number
PD780021A
PD780022A
PD780023A
PD780024A PD78F0034A
Item
PD780031A
PD780032A
PD780033A
PD780034A PD78F0034B
Internal memory
ROM
8 KB
16 KB
24 KB
32 KB
32 KBNote
(Mask ROM)
(Flash memory)
High-speed RAM
512 bytes
1024 bytes
1024 bytesNote
Memory space
64 KB
General-purpose register
8 bits
× 32 registers (8 bits × 8 registers × 4 banks)
Minimum instruction
Minimum instruction execution time changeable function
execution time
When main system
 0.166
s/0.333 s/0.666 s/1.33 s/2.66 s (@ 12 MHz operation,
clock selected
expanded-specification product only)
 0.238
s/0.477 s/0.954 s/1.90 s/3.81 s (@ 8.38 MHz operation)
When subsystem
122
s (@ 32.768 kHz operation)
clock selected
Instruction set
 16-bit operation
 Multiply/divide (8 bits
× 8 bits, 16 bits ÷ 8 bits)
 Bit manipulate (set, reset, test, and Boolean operation)
 BCD adjust, etc.
I/O port
Total:
51
 CMOS input:
8
 CMOS I/O:
39
 N-ch open-drain I/O (5 V breakdown): 4
A/D converter
 8-bit resolution
× 8 channels (
PD780021A, 780022A, 780023A, 780024A)
 10-bit resolution
× 8 channels (
PD780031A, 780032A, 780033A, 780034A,
78F0034A, 78F0034B)
 Low-voltage operation: AVDD = 1.8 to 5.5 V
Serial interface
 3-wire serial I/O mode:
2 channels
 UART mode:
1 channel
Timer
 16-bit timer/event counter: 1 channel
 8-bit timer/event counter:
2 channels
 Watch timer:
1 channel
 Watchdog timer:
1 channel
Timer output
Three outputs (8-bit PWM output enable: 2)
Clock output
 93.7 kHz, 187 kHz, 375 kHz, 750 kHz, 1.5 MHz, 3 MHz, 6 MHz, 12 MHz
(12 MHz with main system clock, expanded-specification product only)
 65.5 kHz, 131 kHz, 262 kHz, 524 kHz, 1.05 MHz, 2.10 MHz, 4.19 MHz,
8.38 MHz (8.38 MHz with main system clock)
 32.768 kHz (32.768 kHz with subsystem clock)
Buzzer output
 1.46 kHz, 2.92 kHz, 5.85 kHz, 11.7 kHz (12 MHz with main system clock,
expanded-specification product only)
 1.02 kHz, 2.05 kHz, 4.10 kHz, 8.19 kHz (8.38 MHz with main system clock)
Vectored interrupt
Maskable
Internal: 13, External: 5
source
Non-maskable
Internal: 1
Software
1
Note The capacities of internal flash memory and internal high-speed RAM can be changed by means of the
memory size switching register (IMS).