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C8051F340-GQR Datasheet(PDF) 4 Page - Silicon Laboratories |
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C8051F340-GQR Datasheet(HTML) 4 Page - Silicon Laboratories |
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4 / 276 page  C8051F340/1/2/3/4/5/6/7/8/9/A/B/C/D 4 Rev. 1.3 11.2.Power-Fail Reset / VDD Monitor .................................................................... 102 11.3.External Reset ................................................................................................ 103 11.4.Missing Clock Detector Reset ........................................................................ 103 11.5.Comparator0 Reset ........................................................................................ 103 11.6.PCA Watchdog Timer Reset .......................................................................... 103 11.7.Flash Error Reset ........................................................................................... 103 11.8.Software Reset ............................................................................................... 104 11.9.USB Reset...................................................................................................... 104 12. Flash Memory ....................................................................................................... 107 12.1.Programming The Flash Memory ................................................................... 107 12.1.1.Flash Lock and Key Functions ............................................................... 107 12.1.2.Flash Erase Procedure .......................................................................... 107 12.1.3.Flash Write Procedure ........................................................................... 108 12.2.Non-Volatile Data Storage.............................................................................. 109 12.3.Security Options ............................................................................................. 109 13. External Data Memory Interface and On-Chip XRAM........................................ 114 13.1.Accessing XRAM............................................................................................ 114 13.1.1.16-Bit MOVX Example ........................................................................... 114 13.1.2.8-Bit MOVX Example ............................................................................. 114 13.2.Accessing USB FIFO Space .......................................................................... 115 13.3.Configuring the External Memory Interface .................................................... 116 13.4.Port Configuration........................................................................................... 116 13.5.Multiplexed and Non-multiplexed Selection.................................................... 119 13.5.1.Multiplexed Configuration....................................................................... 119 13.5.2.Non-multiplexed Configuration............................................................... 120 13.6.Memory Mode Selection................................................................................. 120 13.6.1.Internal XRAM Only ............................................................................... 121 13.6.2.Split Mode without Bank Select.............................................................. 121 13.6.3.Split Mode with Bank Select................................................................... 122 13.6.4.External Only.......................................................................................... 122 13.7.Timing .......................................................................................................... 122 13.7.1.Non-multiplexed Mode ........................................................................... 124 13.7.2.Multiplexed Mode ................................................................................... 127 14. Oscillators ............................................................................................................. 131 14.1.Programmable Internal High-Frequency (H-F) Oscillator ............................... 132 14.1.1.Internal H-F Oscillator Suspend Mode ................................................... 132 14.2.Programmable Internal Low-Frequency (L-F) Oscillator ................................ 133 14.2.1.Calibrating the Internal L-F Oscillator..................................................... 133 14.3.External Oscillator Drive Circuit...................................................................... 135 14.3.1.Clocking Timers Directly Through the External Oscillator...................... 135 14.3.2.External Crystal Example....................................................................... 135 14.3.3.External RC Example............................................................................. 136 14.3.4.External Capacitor Example................................................................... 136 14.4.4x Clock Multiplier .......................................................................................... 138 14.5.System and USB Clock Selection .................................................................. 139 |
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