ADE7166ASTZF8 Analog Devices Inc, ADE7166ASTZF8 Datasheet - Page 108

• 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

ADE7566/ADE7569/ADE7166/ADE7169
Enabling Flash Protection by Emulator Commands
Another way to set the flash protection bytes is to use some
reserved emulator commands available only in download mode.
These commands write directly to the SFRs and can be used to
duplicate the operation mentioned in the Enabling Flash
Protection by Code section. When these flash bytes are written,
the part can exit emulation mode by a reset and the protections
are effective. This method can be used in production and
implemented after downloading the program. The commands
used for this operation are an extension of the commands listed
in the Application Note uC004: Understanding the Serial
Download Protocol , available at www.analog.com.
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•
By omitting the protocol defined in the uC004: Understanding
the Serial Download Protocol application note, the sequence to
load protections is similar to the sequence presented in the
Enabling Flash Protection by Code section, except that two
emulator commands are necessary to replace one assembly
command. For example, to write the protection value in
EADRH, the two following commands need to be executed:
•
•
Notes on Flash Protection
The flash protection scheme is disabled by default so that none
of the pages of the flash are protected from reading or writing/
erasing.
The last page must be read and write/erase protected for the
protection scheme to work.
To activate the protection settings, the ADE7566/ADE7569/
ADE7166/ADE7169 must be reset after configuring the
protection.
After configuring protection on the last page and resetting the
part, protections that have been enabled can only be removed by
mass erasing the flash memory. The protection bits are read and
erase protected by enabling read and write/erase protection on the
last page, but the protection bits are never truly write protected.
Following this protocol, the protection can be written to the
flash using the same sequence as mentioned in the Enabling
Flash Protection by Code section. When the part is reset, the
protection is effective.
Command with ASCII Code I or 0x49 writes the data into R0.
Command with ASCII Code F or 0x46 writes R0 into the
SFR address defined in the data of this command.
Command I with data = value of Protection Byte 0x3FFF.
Command F with data = 0xC7.
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Protection bits can be modified from a 1 to a 0, even after the
last page has been protected. In this way, more protection can
be added but none can be removed.
The protection scheme is intended to protect the end system. Pro-
tection should be disabled while developing and emulating code.
Flash Memory Timing
Typical program and erase times for the flash memory are
shown in Table 101.
Table 101. Flash Memory Program and and Erase Times
Command
Write Byte
Erase Page
Erase All
Read Byte
Erase Page and Write
Byte
Verify Byte
Note that the core microcontroller operation is idled until the
requested flash memory operation is complete. In practice, this
means that even though the flash operation is typically initiated
with a two-machine-cycle MOV instruction to write to the
Flash Control SFR (ECON, 0xB9), the next instruction is not
executed until the Flash/EE operation is complete. This means
that the core cannot respond to interrupt requests until the
Flash/EE operation is complete, although the core peripheral
functions, such as counters and timers, continue to count as
configured throughout this period.
IN-CIRCUIT PROGRAMMING
Serial Downloading
The ADE7566/ADE7569/ADE7166/ADE7169 facilitate code
download via the standard UART serial port. The parts enter
serial download mode after a reset or a power cycle if the SDEN
pin is pulled low through an external 1 kΩ resistor. When in
serial download mode, the hidden embedded download kernel
executes. This allows the user to download code to the full 16 kB
of flash memory while the device is in-circuit in its target
application hardware.
Protection configured in the last page of the ADE7566/ADE7569/
ADE7166/ADE7169 affects whether flash memory can be
accessed in serial download mode. Read protected pages cannot be
read. Write/erase protected pages cannot be written or erased.
Bytes
Affected
1 byte
512 bytes
16 kB
1 byte
512 bytes
1 byte
Flash Memory
Timing
30 μs
20 ms
200 ms
100 ns
21 ms
100 ns