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SM59R16A2 Folha de dados(PDF) 11 Page - SyncMOS Technologies,Inc |
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SM59R16A2 Folha de dados(HTML) 11 Page - SyncMOS Technologies,Inc |
11 / 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 11 Ver.B SM59R16A2/SM59R08A2 06/2009 Fig. 1-2(a): The waveform of internal instruction signal in 2T mode Fig. 1-2(b): The waveform of internal instruction signal in 1T mode The default is in 2T mode, and it can be changed to 1T mode if IFCON [7] (at address 8Fh) is set to high any time. Not every instruction can be executed with one machine cycle. The exact machine cycle number for all the instructions are given in the next section. 1.4 Reset Brownout detection is also one type of internal reset to prevent SM59R16A2/SM59R08A2 from going to unstable condition as described in Section 1.3. 1.5 Clocks The default clock is the 1MHz clock signal coming from the internal OSC. This clock is used during the initialization stage. The major work of the initialization stage is to determine the clock source used in normal operation. The clock source can be external and internal. The external clock source is from the crystal via crystal pads XTAL1 and XTA2, or oscillator through XTAL1 only. Here we need to be aware that XTAL1 are not 5V tolerant in 3.3V application, so a 3.3V oscillator source is recommended. The internal clock sources are from the internal OSC with difference frequency division as given in the next table: Table 1-1: Selection of clock source Clock source external crystal or internal OSC 24MHz from internal OSC 20MHz from internal OSC 16MHz from internal OSC 12MHz from internal OSC 8MHz from internal OSC 4MHz from internal OSC 2MHz from internal OSC 1MHz from internal OSC as default clock used in initialization There may be 20% variance in the frequency from the internal OSC. It is not recommended to use them in the application requiring accurate frequency. |
Nº de peça semelhante - SM59R16A2 |
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Descrição semelhante - SM59R16A2 |
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