<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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