English

BL6523
BL6523GX
Single Phase Multifunction Energy meter IC
DESCRIPTION
FEATURES
The BL6523GX is a low cost, high accuracy,
High accuracy, less than 0.1% error over a
high stability, electrical energy measurement IC
dynamic range of 6000:1
intended to single phase, multifucion applications.
High stability, less than 0.1% error in the output
The BL6523GX incorporates three high accuracy
frequency fluctuation
Sigma-Delta
Measure the active power in the positive
management and digital signal processing circuit
orientation and negative orientation, transform to
using to calculates active energy, apparent energy,
fast pulse output(CF）
IRMS, VRMS etc.
Provide two current input for line and neutral
ADC,
voltage
reference,
The BL6523GX have two current input
power
for line
current measurement
and neutral current measurement, when these currents
Mesure instantaneous IRMS and VRMS over a
differ by more than the programmable Fault
dynamic range of 3000:1
threshold value(RMS or WATT), the BL6523GX give
Provide SAG detection and Phase failure
the tamper detection and can enable neutral current
detection
billing,
The BL6523GX measures line voltage, current
On-chip power supply detector
On-chip
anti-creep
protection
with
the
and calculates active, apparent energy, power factor,
programmable threshold set
line frequency, detect sag, overvoltage, overcurrent,
Provide the pulse output with programmable
peak, and reverse power, zero-crossing voltage.
The BL6523GX provides access to on-chip meter
frequency adjustment
Provide the programmable gain adjustment and
registers via UART communication interface.
The BL6523GX provide all-digital domain offset
phase compensation
Measure the power factor (PF）
compensation, gain adjustment, phase compensation
Provide a programmable interrupt request signal
(maximum ±2.54° adjustable）.
（/IRQ）
Provide a UART communication interface
On-chip voltage reference of 2.5V
With 3.58MHz external crystal oscillator
Single 5V supply, 25mW（typical）
Interralated patents are pending
BLOCK DIAGRAM
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BL6523
BL6523GX
Single Phase Multifunction Energy meter IC
PIN DESCRIPTIONS（
（SOP16）
）
Pin
Symbol
DESCRIPTIONS
16,1
IAP,IAN
Analog input for current channel A, These inputs are fully differential
voltage inputs with a maximum signal range of ±660 mV, the PGA
accociated with these inputs has a maximum gain of 32.
2,3
IBP，IBN
Analog input for current channel A, These inputs are fully differential
voltage inputs with a maximum signal range of ±660 mV, the PGA
accociated with these inputs has a maximum gain of 32.
4,5
VP，VN
Analog Input for Voltage Channel. These inputs are fully differential
voltage inputs with a maximum signal range of ±660 mV, the PGA
accociated with these inputs has a maximum gain of 32.
6
VREF
On-Chip Voltage Reference. The on-chip reference has a nominal value of
2.5V ± 8% and a typical temperature coefficient of 30ppm/℃. This pin
should be decoupled with a 0.1uF ceramic capacitor. An external
reference source may also be connected at this pin.
7
GND
Ground Reference.
8
/RST
Reset Pin. Logic low on this pin will hold the ADCS and digital circuitry
in a reset condition and clear internal registers.
9
CF
Calibration Frequency. The CF logic output gives instantaneous real
power information. This output is intended to use for calibration purposes.
The full-scale output frequency can be scaled by the value of WA_CFDIV
register. When the power is low, the pulse width is equal to 90ms. When
the power is high and the output period less than 180ms, the pulse width
equals to half of the output period.
10
CLKOUT
A crystal can be connected across this pin and Pin11 as described above to
provide a clock source.
11
CLKIN
Clock Input for BL6523GX. An external clock can be provided at this
logic input, Alterrnatively, a crystal (3.58MHz) can be connected across
this pin and pin10 to provide a clock source.
12
GND
13
TX
Data output for UART interface.
14
RX
Data input for UART interface.
15
VDD
Ground Reference.
i Power Supply（+5V）,provides the supply voltage for BL6523GX. It
should be maintained at +4.75V~+5.25V for specified operation
Package Dimensions(SOP-16)
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BL6523
BL6523GX
Single Phase Multifunction Energy meter IC
ABSOLUTE MAXIMUM RATIONS
（T = 25 ℃）
Parameter
Symbol
Value
单位
Power Voltage AVDD、DVDD
AVDD、DVDD
-0.3 ~ +7
V
Analog Input Voltage to AGND
IAP、IBP、VP
-6 ~ +6
V
Digital Input Voltage to DGND
RX
-0.3 ~ VDD+0.3
V
Digital Output Voltage to DGND
CF, TX
-0.3 ~ VDD+0.3
V
Operating Temperature Range
Topr
-40 ~ +85
℃
Storage Temperature Range
Tstr
-55 ~ +150
℃
Power Dissipation（SOP-16）
P
80
mW
Electronic Characteristic Patameter
（VDD = 5V, GND＝0V, CLKIN=3.58MHz, T=25℃）
Parameter
Symbol
Test Condition
Measure
Pin
Min
Value
Typical
Value
Max
Value
Unit
0.1
0.3
%
Measure Error on
Active Power
WATTerr
Over a dynamic
range 6000:1
Phase error when
PF=0.8 Capacitive
PF08err
Current lead
37°
（PF=0.8）
0.5
%
Phase error when
PF=0.5Inductive
PF05err
Current lags
60°
（PF=0.5）
0.5
%
AC PSRR
ACPSRR
IP/N=100mV
0.01
%
DC PSRR
DCPSRR
VP/N=100mV
0.1
%
Vrms measurement
Error
VRMSerr
3000:1 input DR
0.3
%
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CF
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BL6523
BL6523GX
Irms measurement
Error
IRMSerr
Single Phase Multifunction Energy meter IC
3000:1 input DR
0.3
Maximum Input
voltage
%
±660
Input Impedance
370
mV
kΩ
Input Signal
Bandwidth
（-3dB）
Gain Error
External 2.5V
reference
-4
+4
%
Gain Error match
External 2.5V
reference
-1.5
+1.5
%
On-chip reference
Vref
Reference Error
Vreferr
Temperature
Coefficient
TempCoef
VREF
Input Low Voltage
VDD=5V±5%
Output High
Voltage
VDD=5V±5%
Output Low
Voltage
VDD=5V±5%
IDD
IDD
2.5
V
30
VDD=5V±5%
VDD
kHz
±200
Input High Voltage
Power Supply
14
4/18
ppm/℃
2.6
V
0.8
V
4
V
4.75
VDD=5.25V
mV
1
V
5.25
V
5
mA
v1.0
BL6523
BL6523GX
Single Phase Multifunction Energy meter IC
THEORY OF OPERATION
Principle of Energy Measurement
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BL6523
BL6523GX
Single Phase Multifunction Energy meter IC
In energy measure, the power information varying with time is calculated by a direct
multiplication of the voltage signal and the current signal. Assume that the current signal and the
voltage signal are cosine functions, V,I are the peak values of the voltage signal and the current
signal; the phase difference between the current signal and the voltage signal is expressed as
Ф,Then the power is given as follows:
p (t ) = V cos( wt ) × I cos( wt + Φ )
If Φ =0 时：
p (t ) =
If Φ ≠ 0 时：
VI
(1 + cos( 2 wt )
2
p(t ) = V cos( wt ) × I cos( wt + Φ )
= V cos( wt ) × [I cos( wt ) cos(Φ) + sin( wt ) sin(Φ )]
VI
(1 + cos(2 wt )) cos(Φ ) + VI cos( wt ) sin( wt ) sin(Φ)
2
VI
VI
=
(1 + cos(2 wt )) cos(Φ ) + sin(2wt ) sin(Φ)
2
2
=
p (t) is called as the instantaneous power signal. The ideal p(t) consists of the DC component and
AC component whose frequency is 2ω. The DC component is called as the average active power.
The current signal and voltage signal is converted to digital signals by high-precsion ADCS,
then through the drop sampling filter (SINC4), high-pass filter (HPF) filter out the high frequency
noise and DC gain, get the required current and voltage sampling data.
Current sampling data multiplied by voltage sampling data gets instantaneous active power,
then through the low pass filter (LPF), output average active power.
Current sampling data and voltage sampling data processed by square circuit, low-pass filter
(LPF1), square root circuit, get the current RMS and voltage RMS.
Active power through a certain time integral, get active energy.
Front-end gain adjustment
Every analog channel has a programmable gain amplifier (PGA), gain selection is achieved
by the gain register (GAIN), the default value of the gain register (GAIN) is 000H.
Every 4-bit of the gain register used to select the current channel or voltage channel PGA.
Gain[3:0] used to select Current A channel PGA,Gain[7:4] used to select Current B channel PGA,
Gain[11:8] used to select Voltage channel PGA.
For example Gain [3:0]:
x000=1x
x001=2x
x010=4x
x011=8x
x100=16x
x101=24x
x110=32x
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BL6523
BL6523GX
Single Phase Multifunction Energy meter IC
Phase compensation
BL6523GX provides the method of small phase error digital calibration. It will be a small
time delay or advance into signal processing circuit in order to compensate for small phase error.
Because this compensation should be promptly, so this method applies only to 0.1°~0.5° range of
small phase error.
Phase calibration register(PHCAL) is a binary 24-bit register, corresponding to the
compensation current A channel, current B channel and voltage channel phase. The default value
is 000000H.
PHCAL [23:16] for Voltage channel;
PHCAL [15:8] for Current channel B;
PHCAL [7:0] for Current channel A;
Bit[7]/Bit[15]/Bit[23] is enable bit, when Bit[7] /Bit[15]/Bit[23] ＝ 0,disable Phase
compensation; Bit[7]＝1,enable Phase compensation. Bit[6:0]/Bit[14:8]/Bit[22:16] used to adjust
the delay time，1.1us/1LSB. With a line frequency of 50Hz, the resolution is 360°×（1/900KHz）
×50Hz=0.02°, The adjustable range is 0°~2.54°.
Input channel offset calibration
BL6523GX contains the input channel offset calibration registers (IA_CHOS, IB_CHOS, and
V_CHOS), these registers are in 16-bit complement format, and the default value is 0000H. The
offset may result from the analog input and the analog-digital conversion circuit itself.
Active power offset calibration
BL6523GX contains the active power offset calibration (A_WATTOS, B_WATTOS). Both
registers are in 16-bit complement format, the default value is 0000H. The offset can exist in the
power calculations due to crosstalk between channels on the PCB and in the BL6523GX. The
active power offset calibration allows these offsets to be removed to increase the accuracy of the
measurement at low input power levels.
ActivePower = ActivePower0 + X _ WATTOS
Active power gain adjustment
The gain registers (A_WATTGN, B_WATTGN) are used to adjust the active power
measurement range. Both registers are in 16-bit complement format, the default value is 0000H.
The following formula shows how to adjust the output active power:
Output ActivePower = Active Power × (1 +
X _ WATTWG
)
216
The minimum value that can be write to the X_WATTGN register is 8001H(HEX), which
represents a gain adjustmen of -50%. The maximum value that can be write to the X_WATTGN
register is 7FFFH (HEX), which represents a gain adjustmen of +50%.
Similar gain calibration regisets are available for current channel A, current channel B and
voltage channel (IA_CHGN, IB_CHGN, V_CHGN).
No-load threshold of active power
BL6523GX contains two no-load detection features that eliminate meter creep. BL6523GX
can set the no-load threshold on the active power (WA_CREEP), this register is in 24-bit unsign
magnitude format. The low 12-bit(WA_CREEP_L) is used to set the active power threshold value,
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BL6523
BL6523GX
Single Phase Multifunction Energy meter IC
When the absolute value of the input power signal is less than this threshold, the output active
power is set to zero. This can make the active power register to 0 in no-load conditions, even a
small noise signal input.
 0 , | WATT |< WA _ CREEP _ L
WATT = 
WATT , | WATT |>= WA _ CREEP _ L
The high 12-bit of WA_CREEP register (WA_CREEP_H) is used to set the active power
timer threshold value. The default value is 0xFFF. There have an internal TIME_CREEP register
in BL6523GX, when detect the CF pulse output, the TIME_CREEP register is set to the value of
WA_CREEP_H. If not detected the CF pulse output, the TIME_CREEP register value decrease. If
the TIME_CREEP register decrease to 0, there is still no CF signal output, the BL6523GX
produce a reset signal used to reset the internal energy accumulated register of CF pulse and reload
the value of WA_CREEP_H to the TIME_CREEP register. The resolution of the WA_CREEP_H
is 4.6s / LSB, so the maxium timing anti-creep time is about 5h13m.
MODE [6]=1 enable timing anti-creep function.
MODE [6]=0 disable timing anti-creep function.
Active power compensation of small signal
BL6523GX contains a small active power signal compensation register (WA_LOS), this
register is in 24-bit format. The default value is 0000H。
WA_LOS [11:0] for current channel A; 12-bit complement format
WA_LOS [23:12] for current channel B; 12-bit complement format
Reverse indicator threshold
BL6523GX contains a reverse indicator threshold register(WA_REVP), this register is in
12-bit unsigned magnitude format, When the input power signal is negative and the absolute value
is greater than the power threshold，the BL6523GX output the REVP indicator.
Active energy calculation
The relationship between power and energy can be expressed as：
Power =
dEnergy
dt
Conversely, energy is given as the integral of power.
Energy = ∫ Power dt
In BL6523GX, the active power signals are accumulated in a 53 internal registers
continuously to get active energy, Active energy register WATTHR [23:0] take out this internal
register[52:29] as active energy output. This discrete time accumulation is equivalent to
integration in continuous time.
∞
E = ∫ p(t )dt =LimT →0 {∑ P(nT ) × T }
n=0
Where:
n is the discrete time-sample number; T is the sampling period; the sampling period of
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BL6523
BL6523GX
Single Phase Multifunction Energy meter IC
BL6523GX is 1.1us.
The BL6523GX include a interrupt (APEHF) that is triggered When the active energy
register (WATTHR) is half full. If the enable APEHF bit in the interrupt mask register set to logic
high, the / IRQ output Pin goes logic low.
The BL6523GX include line cycle energy register (LINE_WATTHR). The number of cycles
is writen to the LINECYC register, the LSB of the LINECYC register is 20mS. At the end of a
line cycle accumulation cycle, the LINE_WATTHR regiseter is updated. The LINE_WATTHR
register hold its current value until the end of the next line cycle period, when the content is
replaced with the new reading. If a new value is written to the LINECYC register midway through
a line cycle accumulation, the new value is not internally loaded until the end of a line cycle
period.
Frequency output
The BL6523GX provides an energy-to-frequency conversion for calibration purpose. After
initial calibration at manufacturing, the manufacturer or end customer is often required to verify
the meter accuracy. One convenient way to do this is to provide an output frequency that is
proportional to the active power. This output frequency provides a simple sigle-wire interface that
can be optically isolated to interface to external calibration equipment.
BL6523GX includes a programmable calibration frequency output PIN (CF). The
digital-to-frequency converter is used to generate the pulse output. The pulse output (CF) stay high
for 90ms if the pulse period is longer than 180ms. If the pulse period is shorter than 180ms, the
duty cycle of the pulse output is 50%. The maximum output frequency with ac inputs at full scale
and with WA_CFDIV=010H is approximately 0.5 kHz.
The BL6523GX can set the CF frequency through the WA_CF_DIV register. The default
value of the WA_CFDIV register is 001H (HEX). When set WA_CFDIV[x]=1, the CF frequency
－
is 2(x 4)*CFWA_CFDIV=010H.
Root mean square measurement
The rms is expressed mathematically as:
T
Vrms =
1
V 2 (t )dt
T ∫0
For time-sampled signals:
Vrms =
1
N
N
∑V
2
(i )
i =1
rms offset calibration
BL6523GX contains the rms offset calibration (IA_RMSOS, IB_RMSOS and V_RMSOS).
These registers are in 16-bit complement format, the default value is 0000H. The offset can exist
in the rms calculations due to input noise that is intergrated in the dc component of square
calculation. The rms offset calibration allows these offsets to be removed to increase the accuracy
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BL6523GX
Single Phase Multifunction Energy meter IC
of the measurement at low input power levels.
I ARMS = I ARMS 0 + IX _ RMSOS × 213
2
rms gain calibration
The gain registers (IA_RMSGN, IB_RMSGN and V_RMSGN) are used to adjust the rms
measurement range. Both registers are in 16-bit complement format, the default value is 0000H.
The following formula shows how to adjust the rms:
Output rms = rms × (1 +
X _ RMSGN
)
216
The minimum value that can be write to the X_RMSGN register is 8001H(HEX), which
represents a gain adjustment of -50%. The maximum value that can be write to the X_RMSGN
register is 7FFFH (HEX), which represents a gain adjustment of +50%.
No-load threshold of RMS
BL6523GX can set the no-load threshold on the RMS_CREEP register, this register is in 12-bit
unsigned magnitude format. When the value of the RMS register is less than this threshold, the
RMS register is set to zero. This can make the RMS register to 0 in no-load conditions, even a
small noise signal input.
| RMS |< RMS _ CREEP × 4 / 1.3655
 0
RMS = 
RMS , | RMS |>= RMS _ CREEP × 4 / 1.3655
Apparent Power and Apparent Energy Calculation
In BL6523GX, the apparent power is defined as the product of V_RMS and IX_RMS.
VA＝IX_RMS×V_RMS
The apparent energy is given as the intergral of the apparent power. The apparent power
signals are accumulated in an internal 49-bit register, apparent energy register VAHR [23:0] take
out this internal register [48:25] as apparent energy output. The BL6523GX include a interrupt
(VAPEHF) that is triggered When the apparent energy register (VAHR) is half full. If the enable
VAPEHF bit in the interrupt mask register set to logic high, the / IRQ output Pin goes logic low.
Power Factor
PF＝ (WATT/VA)
PF register is in 24-bit sign magnitude format. Power factor =(sign bit)*((PF[22]×2^－1）＋
（PF[21]×2^－2）＋。。
。), the register value of 0x7FFFFF(HEX) corresponds to a power factor
value of 1, the register value of 0x800000(HEX) corresponds to a power factor of -1, the register
value of 0x400000(HEX) corresponds to a power factor of 0.5.
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BL6523
BL6523GX
Single Phase Multifunction Energy meter IC
Operation Mode Select
Metering channel selection
The default metering channel of BL6523GX is channel A. the MODE [0] of MODE register
is used to select the metering channel.
MODE[0]=0, the metering channel is channel A;
MODE[0]=1, the metering channel is channel B;
MODE[1]=0; disable auto channel select;
MODE[1]=1; enable auto channel select; when the chip detect the imbalance of two current
channel, the chip select the bigger current channel as the metering channel.
High-pass filter selection
In the analog-digital conversion circuit, the current and voltage channels have high-pass
filters to eliminate the DC offset. The MODE [4:2] of MODE register is used to select high-pass
filter.
MODE [2] =0, enable the high-pass filter of current channel A;
MODE [2] =1, disable the high-pass filter of current channel A;
MODE [3] =0, enable the high-pass filter of current channel B;
MODE [3] =1, disable the high-pass filter of current channel B;
MODE [4] =0, enable the high-pass filter of voltage channel;
MODE [4] =1, disable the high-pass filter of voltage channel;
Energy accumulation mode selection
The MODE[9:8] of the MODE regiset is used to select energy accumulation mode.
MODE[9:8]=00, absolute energy accumulation;
MODE[9:8]=01, positive-only energy accumulation;
MODE[9:8]=10, arithmetical energy accumulation;
MODE[9:8]=11, negative-only energy accumulation;;
The current imbalance judgment
The BL6523GX contains the detection of current imbalance. MODE[11:10] of the MODE
register is used to set the current rms imbalance threshold. When the Line current rms and neutral
current rms difference exceeds the threshold, the BL6523GX give the FAULT indicator.
MODE[11]
MODE[10]
Threshold
0
0
12.5%(default)
0
1
6.25%
1
0
3.125%
1
1
10.1%
Electric parameters monitor
Power Supply Monitor
The BL6523GX contains an on-chip power supply monitor. The power supply (VDD) is
continuously monitored by the BL6523GX. if the supply is less than 4V±5%, the BL6523GX
will be reset. This is useful to ensure correct device startup at power-up and power-down. The
power supply monitor has built in hysteresis and filtering. This gives a high degree of immunity to
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BL6523
BL6523GX
Single Phase Multifunction Energy meter IC
false triggering due to noisy supplies. The power supply and decoupling for the part should be
such that the ripple at AVDD does not exceed 5V±5% as specified for normal operation.
Zero-Crossing Detection
The BL6523GX includes a zero-crossing detection on voltage channel. The ZX output pin
goes high on positive-going edge of the voltage channel zero crossing.
Zero-Crossing Timeout
The BL6523GX includes a zero-crossing timeout feature that is designed to detect when no
zero crossings are obtained over a programmable time period. The duration of the zero-crossing
timeout is programmed in the 16-bit ZXTOUT register. The value in the ZXTOUT register is
decremented by 1LSB every 70.5us. If a zero-crossing is obtained, the ZXTOUT register is
reloaded. If the ZXTOUT register reaches 0, a zero-crossing timeout event is issued. The
maximum programmable timeout period is 4.369 secs. An interrupt is associated with the
zero-crossing timeout feature. If enabled, a zero-crossing timeout event causes the external IRQ
pin to go low.
Voltage Sag Detection
The BL6523GX includes a sag detection features that warns the user when the absolute value
of the line voltage falls below the programmable threshold for a programmable number of half line
cycles. The voltage sag feature is controlled by two registers: SAGLVL and SAGCYC. These
registers control the sag voltage threshold and the sag period, respectively.
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BL6523GX
Single Phase Multifunction Energy meter IC
The 12-bit SAGLVL register contains the amplitude that the voltage channel must fall below
before sag event occurs.The sag threshold is the number of half line cycles below which the
voltage channel must remain before a sag condition occurs. Each LSB of the SAGCYC register
corresponds to one half line cycle period. The default value is 0xFF(HEX). At 50Hz, the
maximum sag cycle time is 2.55 seconds.
Peak Detection
The BL6523GX continuously records the maximum value of the current and voltage
channels. The three registers that record the peak values on current channel A, current channel B,
and the voltage channel, respectively, are IA_PEAK, IB_PEAK and V_PEAK.
Peak monitor
The BL6523GX include an overcurrent and overvoltage feature that detects whether the
absolute value of the current or voltage waveform exceeds a programmable threshold. Three peak
threshold register (I_PKLVL and V_PKLVL) are used to set the current or voltage channel peak
threshold, respectively.
If the BL6523GX detects an overvoltage condition, the PKV bit of the interrupt status
register is set to 1. If the PKV bit of the interrupt mask register is enable, the IRQ output go low.
The overcurrent detection feature works in the similar manner.
Interrupt
The BL6523GX uses interrupt status register and interrupt mask register to manage
interrupts. When an interrupt event occurs, the corresponding bit in the STATUS register is set to 1.
If the enable bit for this interrupt, located in the MAK register is set to 0, the external IRQ pin is
pulled to logic 0. The status bit located in the STATUS register is set when an interrupt event
occurs, regardless of whether the external interrupt is enabled.
All interrupts are latched and require servicing to clear. To service the interrupt and return the
IRQ pin to logic 1, the status bits must be cleared using the STATUS register. After completion of
a read from the STATUS register, the IRQ pin returns to logic 1.the status bit can’t be cleared after
a read operation of STAUTS register, but can be writen 0 to the corresponding bit in the status
register through the SPI interface clearing the status bit.
UART interface
The BL6523GX provides a simple UART interface that allows all the functions of
BL6523GX to be accessed using only two single-diredtion pins. This UART interface allows an
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BL6523GX
Single Phase Multifunction Energy meter IC
isolated communication interface to be achieved using only two low cost opto-isolators.
The baud rate is 4800 bps, No parity, 1 stop bit.
Byte format:
t1
By te
Start Bit
t2
D0
D1
D2
t3
D3
D4
D5
D6
D7
Stop Bit
t1=t3=208uS; t2=208*8=1664uS.
Read register frame：
：
t1
RX
0x35
t2
Addr
0x35
t3
TX
t4
Data_L
t4
Data_M
t4
Data_H
SUM
0x35: Read command byte;
Addr: BL6523GX register address;
SUM:（Addr+Data_L+Data_M+Data_H）&0xFF, then byte invert;
Write register frame:
t1
RX
0xCA
t1
Addr
t1
Data_L
t1
Data_M
t1
Data_H
t2
SUM
0xCA
TX
0xCA: write command byte;
Addr: BL6523GX register address;
SUM:（Addr+Data_L+Data_M+Data_H）&0xFF, then byte invert;
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BL6523GX
Single Phase Multifunction Energy meter IC
Register
Register list
AD
DR
ESS
REGISTER
NAME
EXT
ERN
AL
R/W
INT
ERN
AL
R/W
BI
T
DEFA
ULT
DESCRIPTION
ELECTRIC PARAMETERS REGISTER（INTERNAL WRITE）
01H
IA_WAVE
R
W
24
0
Wave register of channel A
02H
IB_WAVE
R
W
24
0
Wave register of channel B
03H
V_WAVE
R
W
24
0
Wave register of Voltage
04H
LINE_
WATTHR
R
W
24
0
Line cycle energy register
05H
IA_RMS
R
W
24
0
Irms register(channel A)
06H
IB_RMS
R
W
24
0
Irms register(channel B)
07H
V_RMS
R
W
24
0
Vrms
08H
PF
R
W
24
0
Power Factor
09H
FREQ
R
W
24
0
Frequency register
0AH
A_WATT
R
W
24
0
Average active power of channel A
0BH
VA
R
W
24
0
Average apparent power
0CH
WATTHR
R
W
24
0
Active energy
0DH
VAHR
R
W
24
0
Apparent energy
0EH
PWAHR
R
W
24
0
Positive active energy
0FH
NWAHR
R
W
24
0
Negative active energy
10H
IA_PEAK
R
W
24
0
Current A Peak register
11H
IB_PEAK
R
W
24
0
Current B Peak register
12H
V_PEAK
R
W
24
0
Voltage Peak register
13H
B_WATT
R
W
24
0
Average active power of channel B
Calibration registers ( External write，Except 3AH）
14H
MODE
R/W
R
24
000000
H
15H
GAIN
R/W
R
12
000H
Channel Gain register
16H
FAULTLVL
R/W
R
12
044H
Current imbalance shielding threshold
register
17H
WA_CREEP
R/W
R
24
FFF02
BH
Active power no-load threshold register
18H
WA_REVP
R/W
R
12
087H
Reverse threshold register
19H
WA_CFDIV
R/W
R
12
001H
Active power CF frequency divider
1AH
A_WATTOS
R/W
R
16
0
Active power offset correction(current
channel A)
1BH
B_WATTOS
R/W
R
16
0
Active power offset correction(current
B)
15/18
Mode regiser,
v1.0
BL6523
BL6523GX
Single Phase Multifunction Energy meter IC
1CH
A_WATTGN
R/W
R
16
0
Active power gain(current channel A)
1DH
B_WATTGN
R/W
R
16
0
Active power gain(current channel B)
1EH
FREQ_SEL
R/W
R
16
4924H
Analog circuitry Frequency Control
1FH
BG_CTRL
R/W
R
16
0F33H
Analong circuitry Control
20H
PHCAL
R/W
R
24
0
Phase calibration register
21H
VAOS
R/W
R
16
0
Apparent Power Offset Calibration
Register
22H
VAGN
R/W
R
16
0
Apparent power gain adjust register
23H
IA_RMSGN
R/W
R
16
0
Current A RMS gain adjust register
24H
IB_RMSGN
R/W
R
16
0
Current B RMS gain adjust register
25H
V_RMSGN
R/W
R
16
0
Voltage RMS gain adjust register
26H
IA_RMSOS
R/W
R
16
0
Current A RMS Offset Calibration
register
27H
IB_RMSOS
R/W
R
16
0
Current B RMS Offset Calibration
register
28H
V_RMSOS
R/W
R
16
0
Voltage RMS Offset Calibration register
29H
RMS_CREEP
R/W
R
12
0
RMS small signal threshold register
2AH
WA_LOS
R/W
R
24
0
Active-power offset Calibration register
Bit[23:12] B channel;
Bit[11:0] A channel;
2BH
IA_CHOS
R/W
R
16
0
Current A channel offset adjustment
register，
2CH
IB_CHOS
R/W
R
16
0
Current B channel offset adjustment
register
2DH
V_CHOS
R/W
R
16
0
Voltage
register
2EH
IA_CHGN
R/W
R
16
0
Current A channel gain adjustment
register
2FH
IB_CHGN
R/W
R
16
0
Current B channel gain adjustment
register
30H
V_CHGN
R/W
R
16
0
Voltage
register
31H
LINECYC
R/W
R
12
000H
32H
ZXTOUT
R/W
R
16
FFFFH
33H
SAGCYC
R/W
R
8
FFH
34H
SAGLVL
R/W
R
12
0
35H
Reversed
36H
I_PKLVL
R/W
R
24
FFFFF
FH
Current peak threshold
37H
V_PKLVL
R/W
R
12
FFFH
Voltage peak threshold
38H
AT_SEL
R/W
R
16
0
Logic output selection
16/18
channel
channel
Line energy
register
offset
gain
adjustment
adjustment
accumulation
cycles
Zero-crossing timeout
Sag period
Sag voltage level
v1.0
BL6523
BL6523GX
39H
MASK
3AH
STATUS
Single Phase Multifunction Energy meter IC
R/W
R
16
0
Interrupt mask register,
R
W
16
0
Interrupt state register
Special register
3BH
READ
R
R
24
0
Contains the data from the last read
operation of SPI
3CH
WRITE
R
R
24
0
Contains the data from the last write
operation of SPI
3DH
CHKSUM
R
R
24
015A4
AH
3EH
WRPROT
R/W
R
8
0
3FH
SOFT_NRST
R/W
/
24
Checksum。The sum of register
14H~39H(except 35H)
Write protection register. Write 55H, it
means that allows write to writable
register。
Write 5A5A5AH to this register, Reset
BL6523GX
Logic output selection register(AT_SEL)
The BL6523GX contains four logic output pin(AT0~AT3) that can output some measurement
states. The AT_SEL register is used to set the AT0~AT3 pin output, AT_SEL [3：0] corresponds to
AT0; AT_SEL[7：4] corresponds to AT1; AT_SEL[11：8] corresponds to AT2; AT_SEL[15：12]
corresponds to AT3. The default value of AT_SEL register is 0x0000, the default output is
AT0=FAULT, AT1=REVP, AT2=ZX, AT3=nSAG.
设置
ATX
OUTPUT
DEFAULT
0000
DESCRIPTION
AT0=FAULT、AT1=REVP、AT2=ZX、AT3=nSAG
0001
nSAG
0
Sag event has occurred
0010
ZXTO
0
Indicates that zero crossing has been missing on the voltage
channel for the length of time specified in the ZXTOUT
register
0011
ZX
0
Voltage channel zero crossing
0100
PKIA
0
Current channel A peak has exceeded IAPKLVL
0101
PKIB
0
Current channel B peak has exceeded IBPKLVL
0110
PKV
0
Voltage peak has exceeded VPKLVL
0111
REVP
0
Sign of active power has changed to negative
1000
APEHF
0
Active energy register(WATTR) is half full
1001
VAPEHF
0
Apparent energy register(VAHR) is half full
1010
FAULT
0
Fault=1 indicates the imbalance in two channels rms, the
difference is greater than the FAULTLVL
1011
CHSEL
0
0 indicates measureing power with channel A;
1 indicates measureing power with channel B;
其余
Reversed
0
Reserved
Interrupt mask register（
（MASK）
）
BITS
INTERRUP DEFAULT
DESCRIPTION
17/18
v1.0
BL6523
BL6523GX
Single Phase Multifunction Energy meter IC
NAME
0
SAG
0
Enable the interrupt that sag event has occurred
1
ZXTO
0
Enable the interrupt of ZXTO
2
ZX
0
Enable the interrupt of ZX
3
PKIA
0
Enable the interrupt of PAIA
4
PKIB
0
Enable the interrupt of PKIB
5
PKV
0
Enable the interrupt of PKV
6
REVP
0
Enable the interrupt of REVP
7
APEHF
0
Enable the interrupt of APEHF
8
VAPEHF
0
Enable the interrupt of VAPEHF
9
FAULT
0
Enable the interrupt of FAULT
10
CHSEL
0
Enable the interrupt of CHSEL
Others
Reversed
0
Reversed
Interrupt status registers(STATUS)
BITS
BIT
NAME
DEFAULT
DESCRIPTION
0
SAG
0
Sag event has occurred
1
ZXTO
0
Indicates that zero crossing has been missing on the voltage
channel for the length of time specified in the ZXTOUT
register
2
ZX
0
Voltage channel zero crossing
3
PKIA
0
Current channel A peak has exceeded IAPKLVL
4
PKIB
0
Current channel B peak has exceeded IBPKLVL
5
PKV
0
Voltage peak has exceeded VPKILVL
6
REVP
0
Sign of active power has changed to negative
7
APEHF
0
Active energy is half full
8
VAPEHF
0
Apparent energy is half full
9
FAULT
0
Fault=1 indicates the imbalance in two channels rms, the
difference is greater than the FAULTLVL
10
CHSEL
0
0 indicates measureing power with channel A;
1 indicates measureing power with channel B;
Others
Reversed
0
Reserved
18/18
v1.0