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详细说明
1. general description
this eprom-based 8-bit micro-controller
uses a fully static cmos design
technology combines higher speed and
smaller size with the low power and high
noise immunity of cmos.
on chip memory system includes 2.0 k
bytes of rom, and 80 bytes of static
ram.
2. features
the followings are some of the features
on the hardware and software :
? fully cmos static design
? 8-bit data bus
? on chip rom size : 2 k words
? internal ram size : 80 bytes
(72 general purpose, 8 special registers)
? 36 single word instructions
? 14-bit instructions
? 2-level stacks
? operating voltage : 2.3 v ~ 6.0 v
? operating frequency : 0 ~ 20 mhz
? the most fast execution time is 200
ns under 20 mhz in all single cycle
instructions
except
the
branch
instruction.
? addressing modes include direct,
indirect and relative addressing
modes
? power-on reset (por), only
available while ped is disable
? power edge-detector reset
? sleep mode for power saving
? 4 oscillator start-up time :
150 μs, 20 ms, 40 ms, 80 ms
? 8-bit real time clock/counter(rtcc)
with 8-bit programmable prescaler
? 4 types of oscillator can be selected
by code options :
rc-low cost rc oscillator
lfxt-low frequency crystal
oscillator
xtal-standard crystal oscillator
hfxt-high frequency crystal
oscillator
? on-chip rc oscillator based
watchdog timer(wdt) can be operated
freely
? 20 i/o pins with their own
independent direction control
3. applications
the application areas of this mdt2020
range from appliance motor control and
high speed automotive to low power
remote transmitters/receivers, pointing
devices,
and
telecommunications
processors, such as remote controller,
small
instruments,
chargers,
toy,
automobile and pc peripheral … etc.
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mdt兼容pic
mdt2005(mdt10p05)完全兼容pic16c54 cf745 pic16f54
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mdt10p621 兼容pic16c63
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