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AS8218 bảng dữ liệu(PDF) 102 Page - ams AG

tên linh kiện AS8218
Giải thích chi tiết về linh kiện  Highly Integrated Single Phase 2 Current Energy Metering Integrated Circuits
PDF  123 Pages
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AS8218 bảng dữ liệu(HTML) 102 Page - ams AG

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Data Sheet AS8218 / AS8228
Revision 3.0, 31-May-06
Page 102 of 123
Write Command
(8 bits)
7
0
1
2
3
4
5
6
15
8
9
10
11
12
13
14
7
0
1
2
3
4
5
6
Start Address
(16 bits)
15
8
9
10
11
12
13
14
7
0
1
2
3
4
5
6
Block Length
(16 bits)
Data
7
0
1
2
3
4
5
6
...
Acknowledge
7
0
1
2
3
4
5
6
(TXD)
Notes:
1) When ‘enable_crc’ is set to 0 the UART1 only sends back the acknowledge word (FAh).
2) When ‘enable_crc’ is set to 1 a 16-bit checksum has to be transferred to the UART1 at the end of the data
stream. The SCT will calculate the checksum and depending on the result it will send back the
acknowledge word (FAh) or the not-acknowledge word (FBh).
Flow Diagram of Operational Modes
VDD[D|A] off
VDD_BAT off
VDD[D|A] off
VDD_BAT on
insert
battery
VDD[D|A] on
VDD_BAT off:
- no clock
- chip stays reset
power-up
(Vmain on)
VDD[D|A] on
VDD_BAT on
power-up
(Vmains on)
BOOTLOAD
Power-on
Reset
MCU in idle
mode, "loop
program" running
MCU:
Program execution,
Command mode active
Finished.
Program
available
Finished.
No program
Receiving
SCT command
Evaluating SCT
command
Write to
EEPROM
Read from
EEPROM
Reset chip
Receiving
SCT command
BOOT
LOAD
16 bit
address
8 bit data
in
(...)
16 bit
address
Back to
MCU
Back to
MCU
Back to
MCU
f4h
f3h
f0h
Program
execution
Command
mode disable
Command
mode enable
UART
handling
Interrupt
from UART
Read from
XDATA
address
Write to
XDATA
address
f6h
f5h
16 bit
address
8 bit data
in
(...)
16 bit
address
Back to
MCU
Back to
MCU
16 bit
blocklength
16 bit
blocklength
8 bit data
out
(...)
8 bit data
out
(...)
Read
Prompt
Set
Baudrate
8 bit out:
"A"
8 bit out:
"L"
8 bit out:
"I"
8 bit out:
"V"
8 bit out:
"E"
Back to
MCU
SBaudH
SBaudL
Back to
MCU
f2h
f1h
16 bit
blocklength
16 bit
blocklength
ACK /
NACK
ACK /
NACK



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