- 您现在的位置：买卖IC网 > Sheet目录1214 > EVAL-ADE7880EBZ (Analog Devices Inc)BOARD EVAL FOR ADE7880
Data Sheet
The CFx pulse output is active low and preferably connected to
V DD
CFx PIN
Figure 88. CFx Pin Recommended Connection
Bits[11:9] (CF3DIS, CF2DIS, and CF1DIS) of the CFMODE
register decide if the frequency converter output is generated at
the CF3, CF2, or CF1 pin. When Bit CFxDIS is set to 1 (the
default value), the CFx pin is disabled and the pin stays high.
When Bit CFxDIS is cleared to 0, the corresponding CFx pin
output generates an active low signal.
Bits[16:14] (CF3, CF2, CF1) in the Interrupt Mask register
MASK0 manage the CF3, CF2, and CF1 related interrupts.
When the CFx bits are set, whenever a high-to-low transition at
the corresponding frequency converter output occurs, an
interrupt IRQ0 is triggered and a status bit in the STATUS0
register is set to 1. The interrupt is available even if the CFx
output is not enabled by the CFxDIS bits in the CFMODE
register.
Synchronizing Energy Registers with CFx Outputs
The ADE7880 contains a feature that allows synchronizing the
content of phase energy accumulation registers with the
generation of a CFx pulse. When a high-to-low transition at one
frequency converter output occurs, the content of all internal
phase energy registers that relate to the power being output at
CFx pin is latched into hour registers and then resets to 0.
See Table 23 for the list of registers that are latched based on
the CFxSEL[2:0] bits in the CFMODE register. All 3-phase
registers are latched independent of the TERMSELx bits of the
COMPMODE register. The process is shown in Figure 89 for
ADE7880
Bits[14:12] (CF3LATCH, CF2LATCH, and CF1LATCH) of the
CFMODE register enable this process when set to 1. When
cleared to 0, the default state, no latch occurs. The process is
available even if the CFx output is not enabled by the CFxDIS
bits in the CFMODE register.
Energy Registers and CF Outputs for Various
Accumulation Modes
Bits[1:0] (WATTACC[1:0]) in the ACCMODE register deter-
mine the accumulation modes of the total and fundamental active
powers when signals proportional to the active powers are chosen
at the CFx pins (the CFxSEL[2:0] bits in the CFMODE register
equal 000 or 011). They also determine the accumulation modes
of the watt-hour energy registers (AWATTHR, BWATTHR,
CWATTHR, AFWATTHR, BFWATTHR and CFWATTHR).
When WATTACC[1:0] = 00 (the default value), the active powers
are sign accumulated in the watt-hour registers and before entering
the energy-to-frequency converter. Figure 90 shows how signed
active power accumulation works. In this mode, the CFx pulses
synchronize perfectly with the active energy accumulated in
xWATTHR registers because the powers are sign accumulated in
both data paths.
ACTIVE ENERGY
NO-LOAD
THRESHOLD
ACTIVE POWER
NO-LOAD
THRESHOLD
REVAPx BIT
IN STATUS0
xWSIGN BIT
IN PHSIGN
CF1SEL[2:0] = 010 (apparent powers contribute at the CF1 pin)
and CFCYC = 2.
APNOLOAD
SIGN = POSITIVE
POS
NEG POS
NEG
CFCYC = 2
The CFCYC 8-bit unsigned register contains the number of
high to low transitions at the frequency converter output between
two consecutive latches. Avoid writing a new value into the
CFCYC register during a high-to-low transition at any CFx pin.
CF1 PULSE
BASED ON
PHASE A AND
PHASE B
APPARENT
POWERS
AVAHR, BVAHR, AVAHR, BVAHR,
CVAHR LATCHED CVAHR LATCHED
ENERGY REGISTERS ENERGY REGISTERS
RESET RESET
Figure 89. Synchronizing AVAHR and BVAHR with CF1
Figure 90. Active Power Signed Accumulation Mode
When WATTACC[1:0] = 01, the active powers are accumulated
in positive only mode. When the powers are negative, the watt-
hour energy registers are not accumulated. CFx pulses are
generated based on signed accumulation mode. In this mode,
the CFx pulses do not synchronize perfectly with the active
energy accumulated in xWATTHR registers because the powers are
accumulated differently in each data path. Figure 91 shows how
positive only active power accumulation works.
WATTACC[1:0] = 10 setting is reserved and the ADE7880
behaves identically to the case when WATTACC[1:0] = 00.
When WATTACC[1:0] = 11, the active powers are accumulated
in absolute mode. When the powers are negative, they change
sign and accumulate together with the positive power in the
watt-hour registers and before entering the energy-to-frequency
Rev. A | Page 67 of 104
发布紧急采购，3分钟左右您将得到回复。
相关PDF资料
EVAL-ADE7953EBZ
BOARD EVAL FOR ADE7953
EVAL-ADF4002EBZ1
BOARD EVAL FOR ADF4002
EVAL-ADG788EBZ
BOARD EVALUATION FOR ADG788
EVAL-ADM1021AEB
BOARD EVAL FOR ADM1021
EVAL-ADM1023EB
BOARD EVAL FOR ADM1023
EVAL-ADM1031EB
BOARD EVAL FOR ADM1031
EVAL-ADM1062TQEBZ
BOARD EVALUATION FOR ADM1062TQ
EVAL-ADM1075CEBZ
BOARD EVAL FOR ADM1075
相关代理商/技术参数
EVAL-ADE7880EBZ
制造商:Analog Devices 功能描述:ADE7880, ENERGY METER, 3 PH, SPI, I2C, E
EVAL-ADE7913EBZ
制造商:AD 制造商全称:Analog Devices 功能描述:3-Channel, Isolated, Sigma-Delta ADC with SPI
EVAL-ADE7953EBZ
功能描述:BOARD EVAL FOR ADE7953 RoHS:是 类别:编程器，开发系统 >> 评估演示板和套件 系列:- 标准包装:1 系列:PSoC® 主要目的:电源管理，热管理 嵌入式:- 已用 IC / 零件:- 主要属性:- 次要属性:- 已供物品:板，CD，电源
EVAL-ADF4001EBZ2
制造商:Analog Devices 功能描述:Evaluation Board For Pll Frequency Synthesizer 制造商:Analog Devices 功能描述:ADF4001 PLL SYNTHESIZER EVAL BOARD
EVAL-ADF4002EB1
制造商:Analog Devices 功能描述:EVAL BOARD - Bulk
EVAL-ADF4002EBZ1
功能描述:BOARD EVAL FOR ADF4002 RoHS:是 类别:编程器，开发系统 >> 评估演示板和套件 系列:- 产品培训模块:Obsolescence Mitigation Program 标准包装:1 系列:- 主要目的:电源管理，电池充电器 嵌入式:否 已用 IC / 零件:MAX8903A 主要属性:1 芯锂离子电池 次要属性:状态 LED 已供物品:板
EVAL-ADF4007EBZ1
功能描述:BOARD EVALUATION FOR ADF4007EB1 RoHS:是 类别:编程器，开发系统 >> 评估演示板和套件 系列:- 标准包装:1 系列:PSoC® 主要目的:电源管理，热管理 嵌入式:- 已用 IC / 零件:- 主要属性:- 次要属性:- 已供物品:板，CD，电源
EVAL-ADF4106EB1
制造商:Analog Devices 功能描述:PLL, Frequency Synthesizer