
MB90470 Series
5
(Continued)
Parameter
Part number
MB90477
MB90478
MB90V470B
ROM capacity
MASKROM
256 KB
8 KB
MASKROM
256 KB
8 KB
RAM capacity
16 KB
CPU functions
Basic instructions
Instruction bit length
Instruction length
Data bit length
Minimum instruction execution time
 : 351
 : 8-bit, 16-bit
 : 1 byte to 7 bytes
 : 1-bit, 8-bit, 16-bit
 : 50 ns (with 20 MHz
machine clock) 
Ports
General purpose input/output ports : 84 Max
General purpose input/output ports (CMOS output) 
General purpose input/output ports (built-in pull-up resistance) 
General purpose input/output ports (N-ch open drain) 
Stop-start synchronized : 1 channel
8-bit 6-channel/16-bit 3-channel
Two 8-bit up-down counters with 6 event input pins
Two 8-bit reload/compare registers
Channel : 1
Overflow interrupt
Channels : 6
Pin input source : from compare register match signal
Channels : 2
Register rewritten from pin input (rising/falling/both edges) 
External interrupt pins : 8 channels (set to edge or level correlation) 
2-channel, built-in
1-channel, built-in
18-bit counter
Interrupt cycle : 1.0 ms, 4.1 ms, 16.4 ms, 131.1 ms
 (minimum times, at base oscillator frequency 4 MHz) 
Conversion accuracy : 8/10-bit switchable
Single conversion mode (converts selected channel 1 time only) 
Scan conversion mode
 (converts multiple consecutive channels, programmable up to 8 channels) 
Continuous conversion mode (converts selected channels continuously) 
Stop conversion mode (converts selected channel, stops and repeats) 
Reset interval : 3.58 ms, 14.33 ms, 57.23 ms, 458.75 ms
 (minimum times, at base oscillator frequency 4 MHz) 
Sleep, stop, CPU intermittent, watch mode
CMOS
Mask version without 
I
2
C
built-in interface
UART
8/16-bit PPG timer
8/16-bit up-down counter/timer
16-bit
input/ 
output 
timers
16-bit free-run timer
Output compare (OCU) 
Input capture (ICU) 
DTP/external interrupt circuit
I/O expansion serial interface
I
2
C interface
Time base timer
A/D converter
Watchdog timer
Low power (standby) modes
Process
Notes
Mask version
EVA function
User pin
Emulator dedicated power supply
Included