
46
CHAPTER 1
OUTLINE (
PD78054 Subseries)
1.8 Outline of Function
ROM
Mask ROM
PROM
Mask ROM
PROM
16 Kbytes 24 Kbytes 32 Kbytes 32 Kbytes 40 Kbytes
48 Kbytes 60 Kbytes 60 Kbytes
Note 3
High-speed RAM
512 bytes
1024 bytes
1024 bytes 1024 bytes
1024 bytes
Note 3
Buffer RAM
32 bytes
Expansion RAM
None
1024 bytes 1024 bytes
Note 4
Memory space
64 Kbytes
General register
8 bits
× 8 × 4 banks
With main system clock selected
0.4
s/0.8 s/1.6 s/3.2 s/6.4 s/12.8 s (@ 5.0 MHz)
With subsystem clock selected
122
s (@ 32.768 kHz)
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
: 69
CMOS input
: 2
CMOS I/O
: 63
N-ch open-drain I/O : 4
A/D converter
8-bit resolution
× 8 channels
D/A converter
8-bit resolution
× 2 channels
Serial interface
3-wire serial I/O/SBI/2-wire serial I/O mode selection possible : 1 channel
3-wire serial I/O mode (Max. 32-byte on-chip auto-transmit/receive) : 1 channel
3-wire serial I/O/UART mode selectable : 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: (14-bit PWM output enable: 1)
Clock output
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 with main system clock)
32.768 kHz (@ 32.768 kHz with subsystem clock)
Buzzer output
1.2 kHz, 2.4 kHz, 4.9 kHz, 9.8 kHz (@ 5.0 MHz with main system clock)
Notes
1. The
PD78P054 is the PROM version for the PD78052, 78053, and 78054.
2. The
PD78P058 is the PROM version for the PD78055, 78056, and 78058.
3. The capacities of the internal PROM and the internal high-speed RAM can be changed using the
memory switching register (IMS).
4. The capacity of the internal expansion RAM can be changed using the internal expansion RAM size
switching register (IXS).
PD78052 PD78053 PD78054 PD78P054 PD78055 PD78056 PD78058 PD78P058
Note 1
Note 2
Item
Part Number
Minimum
instruction
execution time
Internal
memory