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93
CHAPTER 1 FEATURES OF 78K/IV SERIES PRODUCTS
1.16.4 Outline of functions
(1/2)
Product Name
Item
μ
PD784935
μ
PD784936
μ
PD784937
μ
PD78F4937
Number of basic instructions (mnemonics)
113
General registers
8 bits
×
16 registers
×
8 banks or 16 bits
×
8 registers
×
8 banks (memory mapping)
Minimum instruction execution time
160 ns/320 ns/636 ns/1.27
μ
s (at 12.58-kHz operation)
Internal memory
capacity
ROM
92 Kbytes
(Mask ROM)
128 Kbytes
(Mask ROM)
192 Kbytes
(Mask ROM)
192 Kbytes
(Flash memory)
RAM
5,120 bytes
6,656 bytes
8,192 bytes
Memory space
1 Mbyte in total of program and data
I/O ports
Total
80
Inputs
8
I/O
72
Pins with added
functions
Note
LED direct drive
outputs
24
Transistor direct drive
8
N-ch open-drain
4
Real-time output ports
4 bits
×
2, or 8 bits
×
1
IEBus controller
Internal (simplify)
Timer/counters
Timer/counter 0: Timer register
×
1
(16 bits)
Pulse output capability
Toggle output
PWM/PPG output
One-shot pulse output
Capture register
×
1
Compare register
×
2
Timer/counter 1: Timer register
×
1
(16 bits)
Real-time output port
Capture register
×
1
Capture/compare register
×
1
Compare register
×
1
Timer/counter 2: Timer register
×
1
(16 bits)
Pulse output capability
Toggle output
Capture register
×
1
Capture/compare register
×
1 PWM/PPG output
Compare register
×
1
Timer 3:
(16 bits)
Timer register
×
1
Compare register
×
1
Pulse output capability
Toggle output
PWM/PPG output
Watch timer
Interrupt occurs at an interval of 0.5 sec. (Has an internal clock oscillator.)
The input clock can be selected from among the main clock
(12.58 MHz) or clock (32.7 kHz).
PWM output
12-bit resolution
×
2 channels
Serial interfaces
UART/IOE (3-wire serial I/O) : 2 channels (on-chip baud rate generator)
CSI (3-wire serial I/O): 2 channels
A/D converter
8-bit resolution
×
8 channels
Clock output function
Selectable from f
CLK
, f
CLK
/2, f
CLK
/4, f
CLK
/8, f
CLK
/16
(can be used as 1-bit output port)
Watchdog timer
1 channel
Note
The pins with additional functions are included in the I/O pins.