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EVAL-ADE7569F16EB データシート(PDF) 25 Page - Analog Devices |
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EVAL-ADE7569F16EB データシート(HTML) 25 Page - Analog Devices |
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25 / 136 page  Preliminary Technical Data ADE7566/ADE7569 Rev. PrA | Page 25 of 136 Table 19. Scratch Pad 1 SFR (SCRATCH1, 0xFB) Bit No. Mnemonic Default Description 7 to 0 SCRATCH1 0 Value can be written/read in this register. This value is maintained in all the power-saving modes. Table 20. Scratch Pad 2 SFR (SCRATCH2, 0xFC) Bit No. Mnemonic Default Description 7 to 0 SCRATCH2 0 Value can be written/read in this register. This value is maintained in all the power-saving modes. Table 21. Scratch Pad 3 SFR (SCRATCH3, 0xFD) Bit No. Mnemonic Default Description 7 to 0 SCRATCH3 0 Value can be written/read in this register. This value is maintained in all the power-saving modes. Table 22. Scratch Pad 4 SFR (SCRATCH4, 0xFE) Bit No. Mnemonic Default Description 7 to 0 SCRATCH4 0 Value can be written/read in this register. This value is maintained in all the power-saving modes. Table 23. Power Control SFR (POWCON, 0xC5) Bit No. Mnemonic Default Description 7 RESERVED 0 Reserved. 6 METER_OFF 0 Set this bit to turn off the modulators and energy metering DSP circuitry to reduce power if metering functions are not needed in PSM0. 5 RESERVED 0 Reserved. 4 COREOFF 0 Set this bit to shut down the core if in the PSM1 operating mode. 3 RESERVED 0 Reserved. Controls the core clock frequency, fCORE. fCORE = 4.096 MHz/2CD. CD[2:0] Result (fCORE in MHz) 000 4.096 001 2.048 010 1.024 011 0.512 100 0.256 101 0.128 110 0.064 2 to 0 CD[2:0] 010 111 0.032 Writing to the Power Control SFR (POWCON, 0xC5) Writing data to the POWCON SFR involves a double instruction sequence. Global interrupts must first be disabled to ensure that the two instructions occur consecutively. The Key SFR (KYREG, 0xC1) is set to 0xA7 and is immediately followed by a write to the POWCON SFR. For example: CLR EA ;Disable Interrupts while configuring to WDT MOV KYREG,#0A7h ;Write KYREG to 0xA7 to get write access to the POWCON SFR MOV POWCON, #10H ;Shutdown the core NOP NOP |
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