C8051F99x-C8051F98x
13.4.Interrupt Latency............................................................................................. 138
13.5.Interrupt Register Descriptions....................................................................... 140
13.6.External Interrupts INT0 and INT1.................................................................. 147
14.Flash Memory ....................................................................................................... 149
14.1.Programming the Flash Memory .................................................................... 149
14.1.1.Flash Lock and Key Functions............................................................... 149
14.1.2.Flash Erase Procedure .......................................................................... 150
14.1.3.Flash Write Procedure ........................................................................... 150
14.2.Non-volatile Data Storage .............................................................................. 150
14.3.Security Options ............................................................................................. 151
14.4.Determining the Device Part Number at Run Time ........................................ 153
14.5.Flash Write and Erase Guidelines.................................................................. 155
14.5.1.V Maintenance and the V Monitor ................................................. 155
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14.5.2.PSWE Maintenance............................................................................... 156
14.5.3.System Clock ......................................................................................... 156
14.6.Minimizing Flash Read Current ...................................................................... 157
15.Power Management.............................................................................................. 161
15.1.Normal Mode.................................................................................................. 162
15.2.Idle Mode........................................................................................................ 163
15.3.Stop Mode ...................................................................................................... 163
15.4.Suspend Mode ............................................................................................... 164
15.5.Sleep Mode .................................................................................................... 164
15.6.Configuring Wakeup Sources......................................................................... 165
15.7.Determining the Event that Caused the Last Wakeup.................................... 165
15.8.Power Management Specifications ................................................................ 169
16.Cyclic Redundancy Check Unit (CRC0) ............................................................. 170
16.1.CRC Algorithm................................................................................................ 170
16.2.Preparing for a CRC Calculation .................................................................... 172
16.3.Performing a CRC Calculation ....................................................................... 172
16.4.Accessing the CRC0 Result ........................................................................... 172
16.5.CRC0 Bit Reverse Feature............................................................................. 177
17.Voltage Regulator (VREG0) ................................................................................. 178
17.1.Voltage Regulator Electrical Specifications.................................................... 178
18.Reset Sources....................................................................................................... 179
18.1.Power-On Reset............................................................................................. 180
18.2.Power-Fail Reset............................................................................................ 180
18.3.External Reset................................................................................................ 182
18.4.Missing Clock Detector Reset ........................................................................ 182
18.5.Comparator0 Reset ........................................................................................ 183
18.6.PCA Watchdog Timer Reset .......................................................................... 183
18.7.Flash Error Reset ........................................................................................... 183
18.8.SmaRTClock (Real Time Clock) Reset .......................................................... 183
18.9.Software Reset............................................................................................... 184
19.Clocking Sources ................................................................................................. 186
19.1.Programmable Precision Internal Oscillator ................................................... 187
4
Rev. 1.0
SILICON [ SILICON ]
