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CP2201 Datasheet(PDF) 41 Page - Silicon Laboratories |
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CP2201 Datasheet(HTML) 41 Page - Silicon Laboratories |
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41 / 108 page  CP2200/1 Rev. 1.0 41 9.6. Determining the Source of the Last Reset The RSTSTA register can be used to determine the cause of the last reset. Note: If the PORSI bit is set to logic 1, all other bits in RSTSTA are undefined. It is impossible to differentiate between a power-on, power-fail, and oscillator-fail reset by reading the RSTSTA register. Register 13. RSTSTA: Reset Source Status Register Bits 7–3: UNUSED. Read = 00000b, Write = don’t care. Bit 2: SWRSI: Software Reset Indicator 0: Source of last reset was not a write to RESET (SWRESET.2). 1: Source of last reset was a write to RESET (SWRESET.2). Bit 1: PORSI: Power-On / Power-Fail / Oscillator-Fail Reset Indicator 0: Source of last reset was not a power-on, power-fail, or oscillator-fail event. 1: Source of last reset was a power-on, power-fail, or oscillator-fail event. Bit 0: PINRSI: External Pin Reset Indicator 0: Source of last reset was not the /RST pin. 1: Source of last reset was the /RST pin. R/W R/W R/W R/W R/W R R R Reset Value — — — — — SWRSI PORSI PINRSI 00000000 Bit7 Bit6 Bit5 Bit4 Bit3 Bit2 Bit1 Bit0 Address: 0x73 |
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