Outline Of Function - NEC PD78076 User Manual

1.8 Outline of Function

Item
Internal ROM
memory
High-speed RAM
Buffer RAM
Expansion RAM
Memory space
General register
Minimum
With main system clock selected
instruction
execution
With subsystem clock selected
time
Instruction set
I/O port
A/D converter
D/A converter
Serial interface
Timer
Timer output
Clock output
Buzzer output
Notes 1. The capacity of the internal PROM can be changed using the internal memory size switching register
(IMS).
2. The capacity of the internal expansion RAM can be changed using the internal expansion RAM size
switching register (IXS).
CHAPTER 1 OUTLINE ( PD78078 SUBSERIES)
Part Number PD78076
Mask ROM
48 Kbytes
1024 bytes
32 bytes
1024 bytes
64 Kbytes
8 bits x 8 x 4 banks
0.4 s/0.8 s/1.6 s/3.2 s/6.4 s/12.8 s (@ 5.0-MHz operation)
122 s (@ 32.768-kHz operation)
• 16-bit operation
• Multiply/divide (8-bit x 8-bit, 16-bit/8-bit)
• Bit manipulate (set, reset, test, and Boolean operation)
• BCD adjust, etc.
Total
• CMOS input
• CMOS input/output : 78
• N-ch open drain I/O : 8
8-bit resolution x 8 channels
8-bit resolution x 2 channels
• 3-wire serial I/O/SBI/2-wire serial I/O mode selection possible : 1 channel
• 3-wire serial I/O mode (Maximum 32-byte on-chip
automatic transmit/receive function)
• 3-wire serial I/O/UART mode selection possible
• 16-bit timer/event counter : 1 channel
• 8-bit timer/event counter
• Watch timer
• Watchdog timer
5 outputs: (14-bit PWM output enable: 1, 8-bit PWM output enable: 2)
19.5 kHz, 39.1 kHz, 78.1 kHz, 156 kHz, 313 kHz, 625 kHz, 1.25 MHz,
2.5 MHz, 5.0 MHz (@ 5.0-MHz operation with main system clock)
32.768 kHz (@ 32.768-kHz operation with subsystem clock)
1.2 kHz, 2.4 kHz, 4.9 kHz, 9.8 kHz (@ 5.0-MHz operation with main system clock)
PD78078
PROM
60 Kbytes 60 Kbytes
1024 bytes
: 88
: 2
: 4 channels
: 1 channel
: 1 channel
PD78P078
Note 1
Note 2
: 1 channel
: 1 channel
45