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26
CHAPTER 1 FEATURES OF 78K/IV SERIES PRODUCTS
Number of basic instructions (mnemonics)
113
General registers
8 bits
×
16 registers
×
8 banks or 16 bits
×
8 registers
×
8 banks (memory mapped)
160 ns/320 ns/640 ns/1,280 ns (at 25-MHz operation)
Minimum instruction execution time
Internal memory capacity
None
48 Kbytes
(Mask ROM)
64 Kbytes
(Mask ROM)
64 Kbytes
(PROM)
RAM
512 bytes
2,048 bytes
Memory space
1 Mbyte total both program and data
I/O port
Total
46
64
Input
8
8
Input/output
34
56
Output
4
0
Pin with pull-up resistor
32
54
LED direct drive output
8
24
Transistor direct drive
8
Real-time output port
4 bits
×
2, or 8 bits
×
1
Timer/counter
Timer/counter 0:
(16-bit)
Timer register
×
1
Compare register
×
2
Capture register
×
1
Pulse output capability
Toggle output
PWM/PPG output
One-shot pulse output
Timer/counter 1:
(8-/16-bit)
Timer register
×
1
Compare register
×
1
Capture register
×
1
Capture/compare register
×
1
Timer register
×
1
Compare register
×
1
Capture/compare register
×
1
PWM/PPG output
Capture register
×
1
Timer register
×
1
Compare register
×
1
Pulse output capability
Real-time output: 4 bits
×
2
Timer/counter 2:
(8-/16-bit)
Pulse output capability
Toggle output
Timer 3:
(8-/16-bit)
Watchdog timer
1 channel
PWM output function
12-bit resolution
×
2 channels
UART
×
IOE (3-wire serial I/O): 2 channels (on-chip baud rate
Serial interface
generator)
CSI (3-wire serial I/O, SBI)
: 1 channel
A/D converter
8-bit resolution
×
8 channels
8-bit resolution
×
2 channels
D/A converter
Standby function
HALT/STOP/IDLE mode
Interrupt
Hardware sources
Software sources
Non-maskable
Maskable
23 (internal: 16, external: 7 (sampling clock variable input: 1) )
BRK instruction, BRKCS instruction, operand error
Internal: 1, external: 1
Internal: 15, external: 6
4-level programmable priority
3 kinds of process mode (vectored interrupt/macro service/context switching)
Clock output function
Selectable from f
CLK
, f
CLK
/2, f
CLK
/4, f
CLK
/8,
f
CLK
/16 (also usable as 1-bit output port)
Power supply voltage
V
DD
= 2.7 to 5.5 V
80-pin plastic QFP (14
×
14 mm)
80-pin plastic TQFP (fine pitch, 12
×
12 mm:
μ
PD784021 only)
80-pin ceramic WQFN (14
×
14 mm:
μ
PD78P4026 only)
Package
1.2.4 Outline of functions
Product Name
μ
PD784020
μ
PD784021
μ
PD784025
μ
PD784026
μ
PD78P4026
Item
ROM
Additional
function pin
Note
Note
The pins with additional functions are included in the I/O pins.
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