
MB90455 Series
4
I
 PRODUCT LINEUP
(Continued)
Part Number
MB90F455 (S) /
F456 (S) /F457 (S) 
MB90455 (S) /
456 (S) /457 (S) 
MB90V495G
Parameter
Classification
Flash ROM
Mask ROM
Evaluation product
ROM capacity
MB90F455 (S)  : 24 Kbytes
MB90F456 (S)  : 32 Kbytes
MB90F457 (S)  : 64 Kbytes
MB90455 (S)  : 24 Kbytes
MB90456 (S)  : 32 Kbytes
MB90457 (S)  : 64 Kbytes
2 Kbytes
MB90455/456/457 : 
RAM capacity
6 Kbytes
Clock
MB90F455/F456/F457 : 
2 systems
MB90F455S/F456S/F457S : 
1 system
2 systems
MB90455S/456S/457S : 
1 system
2 systems
Process
Package
Operating power supply voltage
Special power supply for 
emulator*
1
CMOS
LQFP-48 (0.50 mm width) 
3.5 V to 5.5 V
PGA256
4.5 V
 to 
5.5 V
None
CPU functions
Number of basic instructions
Instruction bit length
Instruction length
Data bit length
Minimum instruction execution time : 62.5 ns (at 16-MHz machine clock) 
Interrupt processing time : 1.5 
μ
s at minimum (at 16-MHz machine clock) 
Sleep mode/Clock mode/Time-base timer mode/
Stop mode/CPU intermittent
General-purpose input/output ports (CMOS output)  : 34 ports (36 ports*
2
) 
including 4 high-current output ports (P14 to P17) 
18-bit free-run counter
Interrupt cycle : 1.024 ms, 4.096 ms, 16.834 ms, 131.072 ms
 (with oscillation clock frequency at 4 MHz) 
Reset generation cycle: 3.58 ms, 14.33 ms, 57.23 ms, 458.75 ms
 (with oscillation clock frequency at 4 MHz) 
Number of channels: 1
Interrupt upon occurrence of overflow
Number of channels: 4
Retaining free-run timer value set by pin input (rising edge, falling edge, and 
both edges) 
Number of channels: 2
16-bit reload timer operation
Count clock cycle: 0.25 
μ
s, 0.5 
μ
s, 2.0 
μ
s
 (at 16-MHz machine clock frequency) 
External event count is allowed.
15-bit free-run counter
Interrupt cycle: 31.25 ms, 62.5 ms, 12 ms, 250 ms, 500 ms, 1.0 s, 2.0 s
 (with 8.192 kHz sub clock) 
 : 351 instructions
 : 8 bits and 16 bits
 : 1 byte to 7 bytes
 : 1 bit, 8 bits, 16 bits
Low power consumption
 (standby) mode
I/O port
Time-base timer
Watchdog timer
16-bit input/
output timer
16-bit free-run 
timer
Input capture
16-bit reload timer
Clock timer