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SM59R16A2 Datasheet(PDF) 38 Page - SyncMOS Technologies,Inc |
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SM59R16A2 Datasheet(HTML) 38 Page - SyncMOS Technologies,Inc |
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38 / 67 page  SM59R16A2/SM59R08A2 8-Bit Micro-controller 64KB/32KB ISP Flash & 2KB RAM embedded Specifications subject to change without notice contact your sales representatives for the most recent information. ISSFD-M034 38 Ver.B SM59R16A2/SM59R08A2 06/2009 Fig. 9-10: Receive mode B for Serial 1 9.3 Multiprocessor communication of Serial Interface 0 and 1 The feature of receiving 9 bits in Modes 2 and 3 of Serial Interface 0 or in Mode A of Serial Interface 1 can be used for multiprocessor communication. In this case, the slave processors have bit SM20 in S0CON or SM21 in S1CON set to 1. When the master processor outputs slave’s address, it sets the Bit 9 to 1, causing a serial port receive interrupt in all the slaves. The slave processors compare the received byte with their network address. If matched, the addressed slave will clear SM20 or SM21 and receive the rest of the message, while other slaves will leave SM20 or SM21 bit unaffected and ignore this message. After addressing the slave, the host will output the rest of the message with the Bit 9 set to 0, so no serial port receive interrupt will be generated in unselected slaves. 9.4 Baud rate generator 9.4.1 Serial interface 0 modes 1 and 3 (a) When BRS = 0 (in SFR BRGS): () TH1 256 12 32 F 2 Rate Baud SMOD − × × × = OSC (b) When BRS = 1 (in SFR BRGS): () S0REL 2 64 F 2 Rate Baud 10 OSC SMOD − × × = 9.4.2 Serial interface 1 modes A and B () S1REL 2 32 F Rate Baud 10 OSC − × = 9.5 Clock source for baud rate It is not recommended to use the internal OSC as the clock source when the serial interface functions are used. The reason is that the baud rate in the previous section must be as accurate as possible. The internal OSC clock frequency may be varied with +5%. So the user can choose the clock source from external crystal or oscillator. |
Similar Part No. - SM59R16A2 |
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Similar Description - SM59R16A2 |
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