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MB90890 Series
12
FIND Vol.21
No.1 2003
pave the way towards packages that meet the higher
standards of safety and reliability listed below.
An extended range of operating voltages between 3.5V and
5.5V, ensuring enhanced reliability for system operation
without possible voltage drops
A 50% or greater increase in the margin for the circuit,
from the typical 0.3VCC to less than 0.5VCC. This enables
recognition of the 0 level of input voltages, opening up new
possibilities for the realization of noise-resistant systems
Product Features
■ Configured with FUJITSU s original high-performance
F
2
MC-16LX CPU
■ Minimum instruction execution time of 62.5ns (at 16MHz
internal operation frequency)
■ System clock speed that can be increased by integral
multiples with the internal PLL clock (enables increased
internal operating frequency by an integral multiple of 1
to 4 times the base oscillator frequency)
■ Instruction set supporting C language and multitasking
■ Four available power-saving modes
Sleep mode (CPU clock set OFF)
Time-base timer mode
(All timers but the time-base timer set OFF)
Stop mode (Base oscillator set OFF)
CPU intermittent operation mode
(CPU operating clock repeatedly toggles ON and OFF based
on preset values)
■ Resources
I/O port: A maximum of 36 ports available (including four
for higher-current outputs)
18-bit time-base counter/Watchdog timer/Clock timer:1
channel
8/16-bit PPG timer : 8-bit 4-channel, or 16-bit 2-channel
16-bit reload timer: 2 channels
16-bit I/O timer
16-bit free-running timer :1 channel
16-bit input capture (ICU) : 4 channels
UART:2 channels
DTP/external interruption circuit : 4 channels
Figure 1
Operation of Dual-Operation Flash Memory-Integrated Microcontroller Series MB90F897
Figure 2 Operational Flow of CPU Rewrite by Flash Memory