C8051F340_0608 Datasheet, PDF (4/288 Pages) Silicon Laboratories – Full Speed USB Flash MCU Family

C8051F340/1/2/3/4/5/6/7
9.2.7. Register Descriptions ............................................................................... 89
9.3. Interrupt Handler ............................................................................................... 91
9.3.1. MCU Interrupt Sources and Vectors ........................................................ 91
9.3.2. External Interrupts .................................................................................... 91
9.3.3. Interrupt Priorities ..................................................................................... 92
9.3.4. Interrupt Latency ...................................................................................... 92
9.3.5. Interrupt Register Descriptions................................................................. 93
9.4. Power Management Modes ............................................................................ 100
9.4.1. Idle Mode................................................................................................ 100
9.4.2. Stop Mode .............................................................................................. 100
10. Prefetch Engine .................................................................................................... 103
11. Reset Sources....................................................................................................... 105
11.1.Power-On Reset ............................................................................................. 106
11.2.Power-Fail Reset / VDD Monitor .................................................................... 107
11.3.External Reset ................................................................................................ 108
11.4.Missing Clock Detector Reset ........................................................................ 108
11.5.Comparator0 Reset ........................................................................................ 108
11.6.PCA Watchdog Timer Reset .......................................................................... 108
11.7.Flash Error Reset ........................................................................................... 108
11.8.Software Reset ............................................................................................... 109
11.9.USB Reset...................................................................................................... 109
12. Flash Memory ....................................................................................................... 113
12.1.Programming The Flash Memory ................................................................... 113
12.1.1.Flash Lock and Key Functions ............................................................... 113
12.1.2.Flash Erase Procedure .......................................................................... 113
12.1.3.Flash Write Procedure ........................................................................... 114
12.2.Non-volatile Data Storage .............................................................................. 115
12.3.Security Options ............................................................................................. 115
13. External Data Memory Interface and On-Chip XRAM........................................ 121
13.1.Accessing XRAM............................................................................................ 121
13.1.1.16-Bit MOVX Example ........................................................................... 121
13.1.2.8-Bit MOVX Example ............................................................................. 121
13.2.Accessing USB FIFO Space .......................................................................... 122
13.3.Configuring the External Memory Interface .................................................... 123
13.4.Port Configuration........................................................................................... 123
13.5.Multiplexed and Non-multiplexed Selection.................................................... 126
13.5.1.Multiplexed Configuration....................................................................... 126
13.5.2.Non-multiplexed Configuration............................................................... 127
13.6.Memory Mode Selection................................................................................. 127
13.6.1.Internal XRAM Only ............................................................................... 128
13.6.2.Split Mode without Bank Select.............................................................. 128
13.6.3.Split Mode with Bank Select................................................................... 129
13.6.4.External Only.......................................................................................... 129
13.7.Timing .......................................................................................................... 129
13.7.1.Non-multiplexed Mode ........................................................................... 131
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Rev. 1.0