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AS8267 Datasheet(PDF) 115 Page - ams AG

Part # AS8267
Description  Single-Phase 2-Current Energy Measurement Integrated Circuits with Microcontroller, RTC, Programmable Multi-Purpose I/Os
PDF  136 Pages
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Manufacturer  AMSCO [ams AG]
Direct Link  http://www.ams.com
Logo AMSCO - ams AG

AS8267 Datasheet(HTML) 115 Page - ams AG

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Data Sheet AS8267 / AS8268
Revision 1.0, 19-Jun-07
Page 115 of 136
Command Interpreter
The command interpreter is continuously looking at the UART1 input and detects, if a command has been sent,
i.e. a specific byte that is defined to initiate a dedicated mode of operation (see the flow diagram above).
The commands have been specified to lie outside the “normal” ASCII range. All codes not specified within the
following table can directly be transferred to the MCU without any interference by the SCT.
Command Name
Code
Description
SOFT_RESET
F0h
Resets the chip and initiates a BOOTLOAD sequence, then the MCU program is
started.
RD_PROMPT
F1h
The chip sends a specific signature, “ALIVE”. This can be used to test the
UART1/SCT interface.
SBAUD
F2h
Makes it possible to set the UART1 baudrate from outside the chip by directly
accessing the SFRs “SBaudL” and SBaudH”.
Default setting: 11 (3.5795MHz crystal and 19200 Baud)
READ_EE
F3h
Enables reading of data from ext. EEPROM
WRITE_EE
F4h
Data can be written to the ext. EEPROM
READ_X
F5h
Data from the XDATA address space can be read.
WRITE_X
F6h
Data can be written to any location in the XDATA address space.
SET_PW
F7h
Set password
SET_PW1
F8h
Set password and enable attack counter
ACK
FAh
Acknowledge
NACK
FBh
No Acknowledge
SCT Registers
The system control (SCT) registers provide for the setting of various enables signals and selection of the MCU
clock (MCU_CLK) frequency.
Register Name
Address Reset Value Description
-
9000h
-
Not used
enable signals
9001h
000b
See table below
mcuclkdiv[2:0]
9002h
000b
See table below



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