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<html>
<head>
<title>µCsim: CPU types</title>
</head>
<body bgcolor="white">
<h1>Select type of CPU</h1>
The simulator supports following type of microprocessors from MCS51
family:
<p><a href="#51">8051/8031</a>
<br><a href="#52">8052/8032</a>
<br><a href="#ds390">DS390</a>
<br><a href="#51r">8051R</a>
<br><a href="#89c51r">89C51R</a>
<br><a href="#251">80251</a>
<a name="51"><h3>8051/8031</h3></a>
You can select this type of microcontroller using one of the following
parameter for -t option:
<ul><li>51 (HMOS type)
<li>8051 (HMOS type)
<li>8751 (HMOS type)
<li>C51 (CMOS type)
<li>80C51 (CMOS type)
<li>87C51 (CMOS type)
<li>31 (HMOS type)
<li>8031 (HMOS type)
<li>C31 (CMOS type)
<li>80C31 (CMOS type)
</ul>
It includes core 51 features:
<ul><li>64k external RAM
<li>64k ROM
<li>128 byte internal RAM
<li>2 timers (timer #0, timer #1)
<li>Serial interface
<li>4 8-bit quazi bi-directional ports
</ul>
CMOS types also include:
<ul><li>Idle mode
<li>Power down mode
</ul>
<a name="52"><h3>8052/8032</h3></a>
You can select this type of microcontroller using one of the following
parameter for -t option:
<ul><li>52 (HMOS type)
<li>8052 (HMOS type)
<li>8752 (HMOS type)
<li>C52 (CMOS type)
<li>80C52 (CMOS type)
<li>87C52 (CMOS type)
<li>32 (HMOS type)
<li>8032 (HMOS type)
<li>C32 (CMOS type)
<li>80C32 (CMOS type)
</ul>
It includes same features as <a href="#51">8051/8031</a>
microcontrollers and additionaly:
<ul><li>3 timers (timer #0, timer #1, timer #2)
<li>256 bytes of internal RAM
</ul>
<a name="ds390"><h3>DS390</h3></a>
You can select this type of microcontroller using <b>DS390</b> as
parameter for -t option (this is a CMOS type).
It includes same features as <a href="#52">8052</a> and adds:
<ul><li>24 bit flat mode
<li>support for dual DPTR register
<li>128k external RAM
<li>128k ROM
<li>4k internal SRAM usable
<li>10 bit stack mode
<li>"timed access" of SFRs
</ul>
<a name="51r"><h3>8051R</h3></a>
You can select this type of microcontroller using one of the following
parameter for -t option (all are CMOS types):
<ul><li>51R
<li>51RA
<li>51RB
<li>51RC
<li>C51RA
<li>C51RB
<li>C51RC
</ul>
It includes all features that <a href="#52">8052/8032</a> does and
additionaly:
<ul><li>Extended interrupt priority system (4 priority levels)
<li>Extended serial line interface (automatic address recognition)
<li>Watchdog timer
</ul>
<a name="89c51r"><h3>89C51R</h3></a>
You can select this type of microcontroller using <tt>89C51R</tt>
parameter for -t option (this CPU is always CMOS). This is a Philips
clone, excluding duplicated DPTR it is similar to 8051XR from Intel.
<p>It includes all features that <a href="#51r">8051R</a> does and
additionaly:
<ul><li>PCA (Programmable Counter Array): 5 16-bit counter, one of
them can act as watchdog timer.
<li>Duplicated DPTR.
</ul>
<a name="251"><h3>80251</h3></a>
You can select this type of microcontroller using one of the following
parameter for -t option (all are CMOS types):
<ul><li>251
<li>C251
</ul>
<p>It includes all features that <a href="#89c51r">89C51R</a> does
and additionaly:
<ul><li>Nothing implemented yet.
</ul>
<hr>
</body>
</html>
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