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CHAPTER 1 OUTLINE (
µ
PD78078 SUBSERIES)
1.1 Features
Internal high-capacity ROM and RAM
Notes 1. The capacity of internal PROM can be changed by means of the internal memory size switching
register (IMS).
2. The capacity of internal high-speed RAM can be changed by means of the internal expansion RAM
size switching register (IXS).
External Memory Expansion Space: 64 Kbytes
Minimum instruction execution time changeable from high speed (0.4
µ
s: @ 5.0-MHz operation with main
system clock) to ultra-low speed (122
µ
s: @ 32.768-kHz operation with subsystem clock)
Instruction set suited to system control
• Bit manipulation possible in all address spaces
• Multiply and divide instructions incorporated
88 I/O port pins: (including eight N-ch open-drain port pins)
8-bit resolution A/D converter: 8 channels
8-bit resolution D/A converter: 2 channels
Serial interface: Three channels
• 3-wire serial I/O/SBI/2-wire serial I/O mode: 1 channel
• 3-wire serial I/O mode (automatic transmit/receive function): 1 channel
• 3-wire serial I/O/UART mode: 1 channel
Timer: Seven channels
• 16-bit timer/event counter : 1 channel
• 8-bit timer/event counter : 4 channels
• Watch timer : 1 channel
• Watchdog timer : 1 channel
24 vectored interrupt sources
Two test inputs
Two types of on-chip clock oscillator circuits (main system clock and subsystem clock)
Power supply voltage: 1.8 to 5.5 V
Program Memory
(ROM)
Data Memory
Part Number
Type
48 Kbytes
60 Kbytes
60 Kbytes
Note 1
1024 bytes
Note 2
µ
PD78076
µ
PD78078
µ
PD78P078
Internal High-Speed RAM
Internal Buffer RAM
Internal Expansion RAM
1024 bytes 32 bytes 1024 bytes