ADE7166ASTZF8 Analog Devices Inc, ADE7166ASTZF8 Datasheet - Page 37

• Manufacturer Part Number: ADE7166ASTZF8
• Description: IC ENERGY METER 1PHASE 64LQFP
• Manufacturer: Analog Devices Inc

Specifications of ADE7166ASTZF8

• Applications: Energy Measurement
• Core Processor: 8052
• Program Memory Type: FLASH (8 kB)
• Controller Series: ADE71xx
• Ram Size: 512 x 8
• Interface: I²C, SPI, UART
• Number Of I /o: 20
• Voltage - Supply: 3.135 V ~ 3.465 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 64-LQFP
• Ic Function: Single Phase Energy Measurement IC
• Supply Voltage Range: 3.13V To 3.46V, 2.4V To 3.7V
• Operating Temperature Range: -40°C To +85°C
• Digital Ic Case Style: LQFP
• No. Of Pins: 64
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

ENERGY MEASUREMENT
The ADE7566/ADE7569/ADE7166/ADE7169 offer a fixed
function, energy measurement, digital processing core that
provides all the information needed to measure energy in
single-phase energy meters. The part provides two ways to
access the energy measurements: direct access through SFRs for
time sensitive information and indirect access through address
and data SFR registers for the majority of energy measurements.
The I
available through SFRs as shown in Table 30. Other energy
measurement information is mapped to a page of memory that
is accessed indirectly through the MADDPT, MDATL,
MDATM, and MDATH SFRs. The address and data registers act
as pointers to the energy measurement internal registers.
ACCESS TO ENERGY MEASUREMENT SFRs
Access to the energy measurement SFRs is achieved by reading
or writing to the SFR addresses detailed in Table 30. The
internal data for the MIRQx SFRs are latched byte by byte into
the SFR when the SFR is read.
The WAV1x, WAV2x, VRMSx, and IRMSx registers are all 3-byte
SFRs. The 24-bit data is latched into these SFRs when the high
byte is read. Reading the low or medium byte before the high
byte results in reading the data from the previous latched sample.
Sample code to read the V
MOV
MOV
MOV
ACCESS TO INTERNAL ENERGY MEASUREMENT
REGISTERS
Access to the internal energy measurement registers is achieved
by writing to the Energy Measurement Pointer Address SFR
(MADDPT, 0x91). This SFR selects the energy measurement
register to be accessed and determines if a read or a write is
performed (see Table 29).
Table 29. Energy Measurement Pointer Address SFR
(MADDPT, 0x91)
Bit
7
6 to 0
Writing to the Internal Energy Measurement Registers
When Bit 7 of the the Energy Measurement Pointer Address
SFR (MADDPT, 0x91) is set, the content of the MDATx SFRs
(MDATL, MDATM, and MDATH) is transferred to the internal
energy measurement register designated by the address in the
rms
, V
R1, VRMSH
R2, VRMSM
R3, VRMSL
rms
, interrupts, and waveform registers are readily
Description
1 = write, 0 = read
Energy measurement internal register address
rms
//latches data in VRMSH,
VRMSM and VRMSL SFR
register is as follows:
Rev. A | Page 37 of 144
MADDPT SFR. If the internal register is 1 byte long, only the
MDATL SFR content is copied to the internal register, while the
MDATM SFR and MDATH SFR contents are ignored.
The energy measurement core functions with an internal clock
of 4.096 MHz ∕ 5 or 819.2 kHz. Because the 8052 core functions
with another clock, 4.096MHz ∕ 2
the two clock environments when CD = 0 or 1 is an issue. When
data is written to the internal energy measurement registers, a
small wait period needs to be implemented before another read
or write to these registers can take place.
Sample code to write 0x0155 to the 2-byte SAGLVL register
located at 0x14 in the energy measurement memory space is
shown below.
MOV
MOV
MOV
MOV
DJNZ
Reading the Internal Energy Measurement Registers
When Bit 7 of Energy Measurement Pointer Address SFR
(MADDPT, 0x91) is cleared, the content of the internal energy
measurement register designated by the address in MADDPT
is transferred to the MDATx SFRs. If the internal register is
1 byte long, only the MDATL SFR content is updated with a
new value, while the MDATM SFR and MDATH SFR contents
are reset to 0x00.
The energy measurement core functions with an internal clock
of 4.096 MHz ∕ 5 or 819.2 kHz. Because the 8052 core functions
with another clock, 4.096MHz ∕ 2
the two clock environments when CD = 0 or 1 is an issue. When
data is read from the internal energy measurement registers, a
small wait period needs to be implemented before the MDATx
SFRs are transferred to another SFR.
Sample code to read the peak voltage in the 2-byte VPKLVL
register located at 0x16 into the data pointer is shown below.
MOV
MOV
DJNZ
MOV
MOV
ADE7566/ADE7569/ADE7166/ADE7169
MDATM,#01h
MDATL,#55h
MADDPT,#SAGLVL_W (Address 0x94)
A,#05h
ACC,$
;Next write or read to energy
measurement SFR can be done after
this.
MADDPT,#VPKLVL_R (Address 0x16)
A,#05h
ACC,$
DPH,MDATM
DPL,MDATL
CD
CD
, synchronization between
, synchronization between