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ADE7169 数据表(PDF) 34 Page - Analog Devices |
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ADE7169 数据表(HTML) 34 Page - Analog Devices |
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34 / 144 page  ADE7566/ADE7569/ADE7166/ADE7169 Rev. A | Page 34 of 144 3.3 V PERIPHERALS AND WAKE-UP EVENTS Some of the 3.3 V peripherals are capable of waking the ADE7566/ADE7569/ADE7166/ADE7169 from PSM2. The events that can cause the ADE7566/ADE7569/ADE7166/ ADE7169 to wake up from PSM2 are listed in the wake-up events column in Table 28. The interrupt flag associated with these events must be cleared prior to executing instructions that put the ADE7566/ADE7569/ ADE7166/ADE7169 in PSM2 mode after wake-up. Table 28. 3.3 V Peripherals and Wake-Up Events 3.3 V Peripheral Wake- Up Event Wake-Up Enable Bits Flag Interrupt Vector Comments Temperature ADC ∆T Maskable ITADC The temperature ADC can wake up the ADE7566/ADE7569/ ADE7166/ADE7169 if the ITADC flag is set. A pending interrupt is generated according to the description in the Temperature Measurement section. This wake-up event can be disabled by disabling temperature measurements in the Temperature and Supply Delta SFR (DIFFPROG, 0xF3) in PSM2. The temperature interrupt needs to be serviced and acknowledged prior to entering PSM2 mode. VDCIN ADC ΔV Maskable FVDCIN IPSM The VDCIN measurement can wake up the ADE7566/ADE7569/ ADE7166/ADE7169. The FVDCIN is set according to the description in the External Voltage Measurement section. This wake-up event can be disabled by clearing the EVDCIN in the Power Management Interrupt Enable SFR (IPSME, 0xEC); see Table 20. The FVDCIN flag needs to be cleared prior to entering PSM2 mode. Power Supply Management PSR Nonmaskable PSR IPSM The ADE7566/ADE7569/ADE7166/ADE7169 wake up if the power supply is restored (if VSWOUT switches to be connected to VDD). The VSWSOURCE flag, Bit 6 of the Peripheral Configuration SFR (PERIPH, 0xF4), is set to indicate that VSWOUT is connected to VDD. Midnight Nonmaskable Midnight IRTC The ADE7566/ADE7569/ADE7166/ADE7169 wake up at midnight every day to update their calendars. The RTC interrupt needs to be serviced and acknowledged prior to entering PSM2 mode. RTC Alarm Maskable Alarm IRTC An alarm can be set to wake the ADE7566/ADE7569/ADE7166/ ADE7169 after the desired amount of time. The RTC alarm is enabled by setting the ALARM bit in the RTC Configuration SFR (TIMECON, 0xA1). The RTC interrupt needs to be serviced and acknowledged prior to entering PSM2 mode. All I/O pins are treated as inputs. The weak pull-up on each I/O pin can be disabled individually in the Port 0 Weak Pull-Up Enable SFR (PINMAP0, 0xB2), Port 1 Weak Pull-Up Enable SFR (PINMAP1, 0xB3), and Port 2 Weak Pull-Up Enable SFR (PINMAP2, 0xB4) to decrease current consumption. The interrupts can be enabled/disabled. INT0 INT0PRG = 1 IE0 The edge of the interrupt is selected by Bit IT0 in the TCON register. The IE0 flag bit in the TCON register is not affected. The Interrupt 0 interrupt needs to be serviced and acknowledged prior to entering PSM2 mode. INT1 INT1PRG[2:0] = 11x IE1 The edge of the interrupt is selected by Bit IT1 in the TCON register. The IE1 flag bit in the TCON register is not affected. The Interrupt 1 interrupt needs to be serviced and acknowledged prior to entering PSM2 mode. I/O Ports Rx Edge RXPROG[1:0] = 11 PERIPH.7 (RXFG) An Rx edge event occurs if a rising or falling edge is detected on the Rx line. The UART RxD flag needs to be cleared prior to entering PSM2 mode. External Reset RESET Nonmaskable If the RESET pin is brought low while the ADE7566/ADE7569/ ADE7166/ADE7169 is in PSM2, it wakes up to PSM1. LCD The LCD can be enabled/disabled in PSM2. The LCD data memory remains intact. Scratch Pad The four SCRATCHx registers remain intact in PSM2. |
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