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ADE7569 데이터시트(PDF) 25 Page - Analog Devices

부품명 ADE7569
상세설명  Single-Phase Energy Measurement IC with 8052 MCU, RTC, and LCD Driver
PDF  136 Pages
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ADE7569 데이터시트(HTML) 25 Page - Analog Devices

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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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