cd00270292

UM0932
User manual
ST7580 - FSK, PSK multi-mode power line networking
system-on-chip
Introduction
This user manual, which targets application developers, provides complete information on
how to use the ST7580 device in applications by describing the embedded functions and
protocol layers, with a focus on the commands and parameters available to the user to
control and operate the device through its host interface.
For ordering information, mechanical and electrical device characteristics, please refer to
the ST7580 datasheet available from www.st.com.
October 2013
DocID17385 Rev 3
1/43
www.st.com
Contents
UM0932
Contents
1
Documentation conventions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
List of abbreviations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2
Functional overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.1
Protocol stack . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.2
ST7580 Power line frames: structure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
2.3
Power line data transmission . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
2.4
Power line data reception . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
ST7580 reception flow . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
3
Host interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
3.1
UART . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
3.2
Communication protocol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
3.3
2/43
3.2.1
Frame types . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
3.2.2
Local frame . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
3.2.3
Acknowledgment messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
3.2.4
Status message . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
3.2.5
Local port arbitration rules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
3.2.6
Frame delimitation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
3.2.7
Data communication from the ST7580 to the external host . . . . . . . . . . 17
3.2.8
Data communication from external host to the ST7580 . . . . . . . . . . . . . 18
3.2.9
Host interface timeouts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Command codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
3.3.1
BIO_ResetRequest (3Ch) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
3.3.2
BIO_ResetConfirm (3Dh) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
3.3.3
BIO_ResetIndication (3Eh) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
3.3.4
MIB_WriteRequest (08h) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
3.3.5
MIB_WriteConfirm (09h) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
3.3.6
MIB_ReadRequest (0Ch) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
3.3.7
MIB_ReadConfirm (0Dh) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
3.3.8
MIB_EraseRequest (10h) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
3.3.9
MIB_EraseConfirm (11h) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
3.3.10
PingRequest (2Ch) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
3.3.11
PingConfirm (2Dh) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
DocID17385 Rev 3
UM0932
4
Contents
3.3.12
PHY_DataRequest (24h) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
3.3.13
PHY_DataConfirm (25h) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
3.3.14
PHY_DataIndication (26h) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
3.3.15
DL_DataRequest (50h) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
3.3.16
DL_DataConfirm (51h) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
3.3.17
DL_DataIndication (52h) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
3.3.18
DL_SnifferIndication (5Ah) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
3.3.19
SS_DataRequest (54h) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
3.3.20
SS_DataConfirm (55h) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
3.3.21
SS_DataIndication (56h) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
3.3.22
SS_SnifferIndication (5Eh) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
3.3.23
CMD_SyntaxError (36h) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Management information base (MIB) . . . . . . . . . . . . . . . . . . . . . . . . . . 34
4.1
MIB table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
4.2
MIB parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
4.2.1
00h (Modem configuration) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
4.2.2
01h (PHY layer configuration) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
4.2.3
02h (SS Key) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
4.2.4
04h (Last data indication) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
4.2.5
05h (Last TX Confirm) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
4.2.6
06h (PHY Data) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
4.2.7
07h (DL Data) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
4.2.8
08h (SS Data) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
4.2.9
09h (host interface timeout) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
4.2.10
0Ah (firmware version) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
5
Reference . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
6
Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
DocID17385 Rev 3
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43
List of tables
UM0932
List of tables
Table 1.
Table 2.
Table 3.
Table 4.
Table 5.
Table 6.
Table 7.
Table 8.
Table 9.
Table 10.
Table 11.
Table 12.
Table 13.
Table 14.
Table 15.
Table 16.
Table 17.
Table 18.
Table 19.
Table 20.
Table 21.
Table 22.
Table 23.
Table 24.
Table 25.
Table 26.
Table 27.
Table 28.
Table 29.
Table 30.
Table 31.
Table 32.
Table 33.
Table 34.
Table 35.
Table 36.
Table 37.
Table 38.
Table 39.
Table 40.
Table 41.
Table 42.
Table 43.
Table 44.
Table 45.
Table 46.
Table 47.
Table 48.
4/43
List of abbreviations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
PHY frame description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
DL frame description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
SS frame description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
UART baud rate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Local frame format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
ACK and NAK messages codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Status message composition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Communication protocol timeouts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Request command codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Confirm command codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Error command codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Error commands: syntax . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Error commands: ErrorData . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Indication command codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
BIO_ResetRequest: syntax . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
BIO_ResetConfirm: syntax . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
BIO_ResetIndication: syntax . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
BIO_ResetIndication: ResetData . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
MIB_WriteRequest: Syntax. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
MIB_WriteRequest: RequestData. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
MIB_WriteConfirm: syntax . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
MIB_ReadRequest: Syntax . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
MIB_ReadRequest: RequestData . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
MIB_ReadConfirm: Syntax . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
MIB_ReadConfirm: ConfirmData . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
MIB_EraseRequest: Syntax . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
MIB_WriteRequest: RequestData. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
MIB_EraseConfirm: Syntax . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
PingRequest: Syntax . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
PingRequest: RequestData . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
PingConfirm: Syntax . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
PingConfirm: ConfirmData . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
PHY_DataRequest: Syntax . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
PHY_DataRequest: RequestData . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
PHY_DataConfirm: Syntax . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
PHY_DataConfirm: ConfirmData . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
PHY_DataIndication: Syntax . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
PHY_DataIndication: indicationData. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
DL_DataRequest: Syntax . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
DL_DataConfirm: Syntax . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
DL_DataIndication: Syntax . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
DL_SnifferIndication: Syntax . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
SS_DataRequest: Syntax . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
SS_DataRequest: RequestData . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
SS_DataConfirm: Syntax . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
SS_DataIndication: Syntax . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
SS_DataIndication: IndicationData . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
DocID17385 Rev 3
UM0932
Table 49.
Table 50.
Table 51.
Table 52.
Table 53.
Table 54.
Table 55.
Table 56.
Table 57.
Table 58.
Table 59.
Table 60.
Table 61.
Table 62.
Table 63.
List of tables
SS_SnifferIndication: Syntax . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
CMD_SyntaxError: Syntax . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
CMD_SyntaxError:ErrorData . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Management information base (MIB) objects . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
MIB object 00h: MIB_WriteRequest and MIB_ReadRequest data format . . . . . . . . . . . . . 35
MIB object 01h: MIB_WriteRequest and MIB_ReadRequest data format . . . . . . . . . . . . . 35
MIB object 02h: MIB_WriteRequest and MIB_ReadRequest Data format . . . . . . . . . . . . . 40
MIB object 04h: MIB_WriteRequest and MIB_ReadRequest data format . . . . . . . . . . . . . 41
MIB object 05h: MIB_WriteRequest and MIB_ReadRequest data format . . . . . . . . . . . . . 42
MIB object 06h: MIB_WriteRequest and MIB_ReadRequest Data format . . . . . . . . . . . . . 43
MIB object 07h: MIB_WriteRequest and MIB_ReadRequest data format . . . . . . . . . . . . . 43
MIB object 08h: MIB_WriteRequest and MIB_ReadRequest Data format . . . . . . . . . . . . . 44
MIB object 09h: MIB_WriteRequest and MIB_ReadRequest Data format . . . . . . . . . . . . . 44
MIB object 0Ah: MIB_WriteRequest and MIB_ReadRequest data format . . . . . . . . . . . . . 44
Document revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
DocID17385 Rev 3
5/43
43
List of figures
UM0932
List of figures
Figure 1.
Figure 2.
Figure 3.
Figure 4.
Figure 5.
Figure 6.
Figure 7.
Figure 8.
Figure 9.
Figure 10.
Figure 11.
6/43
Functional overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Physical frame structure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Data link frame structure. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Security services frame structure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
ST7580 reception flow . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
ST7580 and external host: UART connections. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Local port character format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Local frame format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Timeout inter character TIC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Data flow from ST7580 to the external host . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Data flow from external host to the ST7580 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
DocID17385 Rev 3
UM0932
1
Documentation conventions
Documentation conventions
List of abbreviations
The following abbreviations are used:
Table 1. List of abbreviations
Abbreviation
Description
MIB
Management information base
PGA
Programmable gain amplifier
ZC
Zero-crossing
PHY
Physical layer
DL
Data link layer
CRC
Cyclic redundancy check
AES
Advanced encryption standard
UART
Universal asynchronous receiver transmitter
Tic
Inter character timeout
Tack
Acknowledge timeout
Tsr
Service request timeout
SS
Security services
BIO
Basic input output
HI
Host interface
DocID17385 Rev 3
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Functional overview
2
UM0932
Functional overview
The ST7580 device provides to the external host a complete physical layer (PHY) and some
data link layer (DL) services for power line communication. It is mainly developed for smart
metering applications in CENELEC A band, but suitable also for other control applications
and remote load management in CENELEC B band.
A UART host interface is available for communication with an external host, exporting all the
functions and services required to configure and control the device and its protocol stack.
2.1
Protocol stack
Below is a list of the protocol layers and functions embedded in the ST7580:

Physical (PHY) layer: hosted in the PHY processor, implements two different
modulation schemes for communication through power line: a B-FSK modulation up to
9.6 kbps and a multi-mode PSK modulation with channel quality estimation, dual
channel receiving mode and convolutional coding, delivering a throughput up to
28.8 kbps.

Data link (DL) layer: the embedded DL layer hosted in the protocol controller offers
framing and error correction services. A further security service (SS) based on 128-bit
AES algorithm is also available for crypting / decrypting frames.

Management information base (MIB): an information database with the data required
for proper configuration of the system.

Host interface: all of the services of the PHY, DL and MIB are exported to an external
host through the local UART port.
Figure 1. Functional overview
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ST7580 Power line frames: structure
The ST7580 device can be configured by the external host to transmit and receive frames
over the power line in accordance with three different frames structures:
1.
Physical (PHY) frames, built with some differences between PSK and FSK modulations
(see [·]), as represented in Figure 2:
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Table 2 lists the fields of PHY frame.
Table 2. PHY frame description
2.
Field name
Length
Description and values
Length
1
Payload length. Allowable values: from 0 up to 255
Payload
Length
Data bytes
Data Link (DL) frames, adding CRC field to physical SDU.
Figure 3 shows the frame structure:
Figure 3. Data link frame structure
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Functional overview
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The external host is allowed to choose the CRC algorithm used (length, endianness, fields
involved in calculation) through a dedicated MIB object (modem configuration 00h,
Section 4.2.1).
The length field is automatically handled by ST7580 and its value is by default equal to the
length of payload and CRC fields.
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Table 3 lists the fields of DL frame.
Table 3. DL frame description
3.
Field name
Length
Description and values
DL length
1
Total length of payload and CRC fields.
Payload
DL length – length of CRC
Data bytes
CRC
1, 2 or 4
CRC calculated in accordance with
algorithm chosen in dedicated MIB object
(modem configuration 00h, Section 4.2.1).
Security services (SS) frames, providing authentication to payload using cryptographic
algorithms based on AES with 128-bit keys. Authentication is provided appending to
user data an AES-CMAC digest. A dedicated key (stored in the MIB object SS key 02h,
Section 4.2.3) is used for both transmitting and receiving frames. Figure 4 shows the
SS frame structure.
Figure 4. Security services frame structure
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Table 4 lists the fields of SS frame.
Table 4. SS frame description
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Field name
Length
Description and values
Header
HL
Part of user data transmitted in clear.
Encrypted payload
LEN-29-HL
Part of user data transmitted ciphered.
IV
12
Initialization vector of AES-CTR algorithm.
HL
1
Header field length.
Digest
16
AES-CMAC digest computed on header, encrypted
payload, IV and HL fields.
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2.3
Functional overview
Power line data transmission
In order to manage data transmission to the power line, three different dedicated services
are available to the external host.
1.
PHY_Data transmission, with frames structured as in Figure 2, requiring the payload as
the only external parameter and building automatically the length field.
2.
DL_Data transmission, with frames structured as in Figure 3, requiring the payload as
the only external parameter and building automatically the length and CRC fields.
3.
SS_Data transmission, with frames structured as in Figure 4, requiring the payload and
header length (greater than 3) as external parameters, building automatically the
length, CRC and HL field, deciding an arbitrary initialization vector and encrypting the
payload.
The external host is allowed to access the ST7580 device and choose which among the
three frame structures are utilized for transmitting data over the power line by selecting the
corresponding available service.
2.4
Power line data reception
In order to manage data reception from the power line, the ST7580 can be configured to be
able to receive in accordance with only one frame structure.
The external host is allowed to set, through a dedicated MIB object (modem configuration,
00h Section 4.2.1), the only frame structure the ST7580 is able to receive.
The ST7580 embeds three corresponding available services:
1.
PHY_Data indication: generated as soon as a frame in compliance with PHY frame
structure (Figure 2) has been received, it exports the PHY payload field
2.
DL_Data indication: generated as soon as a frame in compliance with DL frame
structure (Figure 3) has been received, it exports the DL payload field
3.
SS_Data indication: generated as soon as a frame in compliance with SS frame
structure (Figure 4) has been received, it exports the SS payload field.
A further feature of ST7580 configuration is the Sniffer flag. It can be activated by the
external host through a dedicated MIB object (modem configuration, 00h Section 4.2.1) and
it makes two further services available:
1.
DL_Sniffer indication: generated as soon as a frame in compliance with DL frame
structure (Figure 3) with a wrong CRC has been received, it exports both DL payload
and wrong CRC fields.
2.
SS_Sniffer indication: generated as soon as a frame in compliance with SS frame
structure (Figure 4) that couldn't be correctly decrypted or authenticated has been
received, it exports the whole SS_SDU field.
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ST7580 reception flow
The reception flow for incoming frames is depicted in Figure 5:
Figure 5. ST7580 reception flow
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3
Host interface
Host interface
The host interface is a communication port used by the external host to exchange data with
the ST7580 device.
The host interface consists of a local port (a standard UART), a communication protocol and
a set of commands exchanged between ST7580 and the external host. It manages the
communication and arbitration on the local port, and provides access to ST7580 internal
services.
UART
The local communication is a half duplex asynchronous serial link (UART) using a receiving
input (RXD), a transmitting output (TXD) and a T_REQ signal to manage the
communication.
The connection diagram of the ST7580 using UART as host interface port is shown in
Figure 5.
Figure 6. ST7580 and external host: UART connections
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The communication baud rate is selected after the ST7580 reset, in accordance with the
status of local input ports BR0, BR1 listed in Table 5:
Table 5. UART baud rate
BR1
BR0
Baudrate (b/s)
0
0
9600
0
1
19200
1
0
38400
1
1
57600
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The UART interface has two data channels:

TXD carries data from the ST7580 to the host

RXD carries data from the host to the ST7580
A local request input signal is implemented on the T_REQ pin.
ST7580 UART is a half duplex asynchronous serial port without hardware control flow.
UART settings used are:

Half duplex mode

Standard NRZ bit coding

LSBit first transmission: the bits within each byte are sent LSBit to MSBit

The exchanged frames are composed of characters

A single character is composed of 1 start bit, 8 data bits and 1 stop bit

0-5 V or 0-3.3 V levels on TXD, RXD, T_REQ signals.
Figure 7 shows the character format:
Figure 7. Local port character format
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3.2
Communication protocol
The host interface process implemented in the ST7580 device performs the following tasks:
3.2.1

The frame format definition

The reception mechanism: the UART standard on half duplex data channel is
implemented and collisions are avoided

The acknowledgement to received frames

The timeout management

The error checking: length, syntax and checksum field of a received frame are
controlled and a repetition is requested in case of error.
Frame types
A frame is a sequence of one or more characters encapsulating a data exchanged between
the ST7580 device and the host controller. The communication protocol defines several
frame formats for the different steps of the communication protocol (access to ST7580
services, acknowledgement, device status).
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Host interface
All the ST7580 resources and services (PHY layer, DL layer and MIB management) are
available through local commands and they can be handled by the external host using the
local communication serial interface and the commands defined in the following paragraphs.
3.2.2
Local frame
The format of the frame used in the local communication between the ST7580 and the
external host is graphically represented in Figure 8:
Figure 8. Local frame format
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The frame fields are described in Table 6:
Table 6. Local frame format
Field
Byte length
Value
Description
STX
1
02h or 03h
Start of text delimiter
Length
1
0  255
Byte length of data field
Command code
1
0  FFh
Command code
Data
0  255
Data field (255 byte max.)
2
The checksum of the local frame is the result of
the addition of the elements of the frame, from
length up to the last data byte, or up to the
command byte if there is no data byte.
Checksum
Byte endianness for fields (data and checksum) with a length greater than one byte is:
3.2.3

Data field: structured in sub-fields in accordance with command code specifications
described in Section 3.3.

Checksum field: it is sent LSByte first.
Acknowledgment messages
After receiving a local frame on the host interface, both external host and the ST7580 must
send, through either TXD (ST7580) or RXD (external host), an acknowledgement or not
acknowledgement message.
The two messages have the same format for both ST7580 and external host and they are
1-byte long.
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Table 7 lists their fixed codes.
Table 7. ACK and NAK messages codes
3.2.4
Symbol
Definition
Code
ACK
Acknowledgement
06h
NAK
Not acknowledgement
15h
Status message
The status message is a frame sent by the ST7580 to the host controller when the T_REQ
signal is pulled down.
It is composed of 2 bytes filled in accordance with ST7580 status and configuration. The first
byte (byte index 0) is always the character “?” (ASCII code 3Fh). Other bytes are set as in
Table 8:
Table 8. Status message composition
Byte
Bit
index index
0
Description
Status message first byte 3Fh
0
Configuration status
0: autoreconfiguration correctly occurred
1: autoreconfiguration occurred with errors or at least one
among MIB objects 00h (Modem Config), 01h (PHY
Config), 02h (SS Key) hasn’t changed its default value
after boot
1
Transmission status
0: the ST7580 is not transmitting a power line frame
1: the ST7580 is transmitting a power line frame
2
Reception status
1
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Available values
3-4
Active layer
5
Overcurrent flag
6-7
Estimated ST7580
temperature
0: the ST7580 is not receiving a power line frame
1: the ST7580 is receiving a power line frame
0: PHY layer
1: DL layer
2: SS layer
3: ST7580 not configured
0: no overcurrent event on last transmission
1: last transmission generated at least one overcurrent
event
0: T < 70 °C (typical)
1: 70 °C < T <100 °C (typical)
2: 100 °C < T < 125 °C (typical)
3: T > 125 °C (typical)
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3.2.5
Host interface
Local port arbitration rules
The ST7580 modem is always the communication master. In case of no local transfer, the
ST7580 can initiate a local communication without taking into account the external host
status. On the other hand, when the external host wants to send a local frame, it must first
send a request through the T_REQ (transmitting request) input port. Then the ST7580
answers with a status message allowing or not the reception of a frame (or any other
command).
3.2.6
Frame delimitation
Data coming from the UART serial port are an asynchronous flow of bytes. In order to divide
the bytes flow into a frames flow, the ST7580 communication protocol uses two methods:
length and timeout.
When the number of bytes received reaches the expected frame length, in accordance with
the frame type's characteristics, the frame reception ends.
The time interval between two consecutive characters (two local frames including start and
stop bits) in a local frame must not exceed TIC (timeout inter-character): the receiving part
(ST7580 host interface or external host) no longer accepts any character after this delay
expiration.
Figure 9. Timeout inter character TIC
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The timeout inter character (TIC) is set by default at 10 ms after a reset and it can be
modified by writing a dedicated MIB object (host interface timeout 09h, Section 4.2.9).
If the length and the checksum are both correct, the received frame is accepted, otherwise
all previous characters are discarded.
3.2.7
Data communication from the ST7580 to the external host
When the ST7580 needs to transmit a frame to the host, it can directly send it without any
previous request. The local frame is automatically built with an STX value equal to 02h.
If the length and the checksum of the local frame are both correct, the external host
acknowledges with an ACK character. In other cases, it answers with a NAK character.
If one of the following cases is verified on the RXD line:

Negative acknowledgement (NAK)

Any other frame

No frame within TACK interval.
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The ST7580 device repeats the frame only once after a delay corresponding to TACK,
changing the STX value to 03h. Acknowledgement to re-transmitted frames is considered
positive by default, even if the host controller answers with a negative acknowledgement.
Figure 10. Data flow from ST7580 to the external host
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3.2.8
Data communication from external host to the ST7580
When the external host needs to initiate a data transfer to the ST7580, it must set the
T_REQ signal at low level. As soon as the ST7580 is not busy, it answers with the status
message confirming or not the data channel availability.
If the communication is possible, the external host can start sending a local frame (built with
STX field equal to 02h) within the TSR delay. The T_REQ signal is set to high logic value as
soon as the STX field of the local frame (see Section 3.2.2) has been sent. If the first byte of
the local frame is not received before the TSR delay, the ST7580 ignores it.
Figure 11. Data flow from external host to the ST7580
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At the end of the data reception on the RXD line, the ST7580 sends an acknowledgement
message on the TXD line to inform about the status of the transmission (ACK or NAK) within
a TACK interval.
If the length and the checksum of the local frame are both correct, the ST7580
acknowledges with an ACK character. In other cases, it answers with a NAK character.
In case of a NAK response or no acknowledgement from the ST7580 within the TACK
time-out, a complete sequence must be restarted to repeat the communication.
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3.2.9
Host interface
Host interface timeouts
All the default values of host interface timeouts are reported in Table 9.
Table 9. Communication protocol timeouts
3.3
Timeout
Default value [ms]
Tic
10
Tack
40
Tsr
200
Command codes
Each command frame exchanged between the external host and the ST7580 carries
a command, identified by a unique command code (declared in the command code field as
in Figure 8:)
It is possible to distinguish four different command types:

Request commands sent by the external host to use a ST7580 service

Confirm commands sent by the ST7580 to answer a previous request command
correctly executed

Error commands sent by the ST7580 to answer a previous request command not
executed

Indication commands sent by the ST7580 to inform the external host about a change
on its services; these are unsolicited commands not following any request.
Request commands
Request commands are sent by the external host to perform an action on ST7580. ST7580
executes the command and answers the external host through either a confirm command or
an error command.
Table 10 shows all request commands: their syntax and data fields are explained in the next
paragraphs.
Table 10. Request command codes
Group
Request command
Code
Reset
BIO_ResetRequest (Section 3.3.1)
3Ch
MIB_WriteRequest (Section 3.3.4)
08h
MIB_ReadRequest (Section 3.3.6)
0Ch
MIB_EraseRequest (Section 3.3.8)
10h
PingRequest (Section 3.3.10)
2Ch
PHY_DataRequest (Section 3.3.12)
24h
DL_DataRequest (Section 3.3.15)
50h
SS_DataRequest (Section 3.3.19)
54h
MIB
Ping
Data
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Confirm commands
Confirm commands are sent by the ST7580 to the external host after a previous request
command, if the request itself has been correctly executed.
Table 11 lists confirm command codes: their syntax and data fields are explained in the next
paragraphs.
Table 11. Confirm command codes
Group
Confirm command
Code
Reset
BIO_ResetConfirm (Section 3.3.2)
3Dh
MIB_WriteConfirm (Section 3.3.5)
09h
MIB_ReadConfirm (Section 3.3.7)
0Dh
MIB_EraseConfirm (Section 3.3.9)
11h
PingConfirm (Section 3.3.11)
2Dh
PHY_DataConfirm (Section 3.3.13)
25h
DL_DataConfirm (Section 3.3.16)
51h
SS_DataConfirm (Section 3.3.20)
55h
MIB
Ping
Data
Error commands
Error commands are sent by the ST7580 to the external host after a previous request
command, if it has not been executed or if an error has occurred while it was executing.
Table 12. Error command codes
Group
Error command
Code
Reset
BIO_ResetError
3Fh
MIB_WriteError
0Bh
MIB_ReadError
0Fh
MIB_EraseError
13h
PHY_DataError
27h
DL_DataError
53h
SS_DataError
57h
CMD_SyntaxError
36h
MIB
Data
Syntax error
The data field of the correspondent local frames presents a same syntax for all error
command codes, with the exception of CMD_SyntaxError (Section 3.3.23). It is composed
of 1 byte and it is coded in accordance with the values listed in Table 14.
Table 13. Error commands: syntax
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Source
Command (Args)
Possible response
ST7580
CommandError (ErrorData)
---
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Host interface
Table 14. Error commands: ErrorData
Error cause
Value
Description
Wrong parameter length (WPL)
02h
Data field length in the previous request was wrong
Wrong parameter value (WPV)
03h
At least one of the parameters values in the previous
request was invalid.
Busy
04h
System busy, operation couldn’t be performed.
Thermal error
0Bh
Device internal temperature within threshold 4
[Section 5], ST7580 refused to transmit.
General error
FFh
Generic error code.
Indication commands
Indication commands are sent by the ST7580 to the external host. They notify a reset event
or a power line data reception. Table 15 lists all the indication commands: their syntax and
data fields are explained in the next paragraphs.
Table 15. Indication command codes
Group
Command
Code
Reset
BIO_ResetIndication (Section 3.3.3)
3Eh
PHY_DataIndication (Section 3.3.14)
26h
DL_DataIndication (Section 3.3.17)
52h
DL_SnifferIndication (Section 3.3.18)
5Ah
SS_DataIndication (Section 3.3.21)
56h
SS_SnifferIndication (Section 3.3.22)
5Eh
Data
3.3.1
BIO_ResetRequest (3Ch)
This command is used by the external host to force software reset in the ST7580.
Table 16. BIO_ResetRequest: syntax
3.3.2
Source
Command(Args)
Possible response
Ext. host
CMD_ResetRequest()
BIO_ResetConfirm
BIO_ResetConfirm (3Dh)
This command is sent by the ST7580 after the correct reception of a BIO_ResetRequest
(Section 3.3.1) command.
Table 17. BIO_ResetConfirm: syntax
Source
Command(Args)
Possible response
ST7580
BIO_ResetConfirm(ConfirmData)
---
The ConfirmData field is always composed of 1 byte equal to 00h.
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BIO_ResetIndication (3Eh)
This command is sent by the ST7580 to notify the host about a reset or a power-on event.
Table 18. BIO_ResetIndication: syntax
Source
Command(Args)
Possible response
ST7580
BIO_ResetIndication(ResetData)
---
Table 19. BIO_ResetIndication: ResetData
Byte
Bit
index index
Label
0-1
Reset Cause
2
Autoreconfiguration
Error
3
Autoreconfiguration:
Modem Config Object
Error
0
0: RESETN pin at low state (Hardware Reset) or Power-ON
1: watchdog
2: BIO_ResetRequest (see Section 3.3.1) command
0: autoreconfiguration correctly occurred
1: autoreconfiguration occurred with errors or at least one among MIB
objects 00h (Modem Config), 01h (PHY Config), 02h (SS Key) hasn't
changed its default value after power-on
0: autoreconfiguration on MIB object 00h (Modem Config) correctly
occurred, if such an object has been written by host through
MIB_WriteRequest command after power-on
1: errors during Autoreconfiguration on MIB object 00h (Modem Config)
or the object hasn't been changed its default value after power-on
4
0: autoreconfiguration on MIB object 01h (PHY Config) correctly
occurred, if such an object has been written by host through
Autoreconfiguration:
MIB_WriteRequest command after power-on
PHY Config Object Error
1: errors during Autoreconfiguration on MIB object 01h (PHY Config) or
the object hasn't been changed its default value after power-on
5
0:autoreconfiguration on MIB object 02h (SS Key) correctly occurred, if
such an object has been written by host through MIB_WriteRequest
Autoreconfiguration: SS command after power-on
KeyObject Error
1: errors during Autoreconfiguration on MIB object 02h (SS Key) or the
object hasn't been changed its default value after power-on
6-7
3.3.4
Description
Unused
MIB_WriteRequest (08h)
This command is used by the external host to access an object of the MIB.
The ST7580 checks the parameters for validation:
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
If the check is valid, the object is updated in the database and the ST7580 replies with
a MIB_WriteConfirm (Section 3.3.5).

If the check is not valid, the request is rejected and the ST7580 replies with
a MIB_WriteError (Table 12).
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Host interface
Table 20. MIB_WriteRequest: Syntax
Source
Command(Args)
Possible response
Source
Ext. host
MIB_WriteRequest
(RequestData)
Request accepted: MIB_WriteConfirm
Request rejected: MIB_WriteError (ErrorData)
Ext. host
Table 21. MIB_WriteRequest: RequestData
3.3.5
Byte index
Label
Description
0
INDEX
MIB database entry index. Refer to the MIB table (Table 52) for available
objects allowed to be written.
1n
DATA
Data to be written in the MIB location INDEX.
MIB_WriteConfirm (09h)
This command is sent by the ST7580 to acknowledge an MIB_WriteRequest (see
Section 3.3.4), if the request has been accepted and executed without errors.
Table 22. MIB_WriteConfirm: syntax
3.3.6
Source
Command(Args)
Possible response
ST7580
MIB_WriteConfirm ()
None
MIB_ReadRequest (0Ch)
This command is used by the external host to read the current value of an MIB object.
The ST7580 checks the parameters for validation:

If the check is valid, the object is updated in the database and the ST7580 replies with
a MIB_ReadConfirm (Section 3.3.7).

If the check is not valid, the request is rejected and the ST7580 replies with
a MIB_ReadError (Table 12).
Table 23. MIB_ReadRequest: Syntax
Source
Command(Args)
Possible response
Ext. host
MIB_ReadRequest
(RequestData)
Request accepted: MIB_ReadConfirm (ConfirmData)
Request rejected: MIB_ReadError (ErrorData)
Table 24. MIB_ReadRequest: RequestData
Byte
index
Label
Description
0
INDEX
MIB database entry index. Refer to the MIB table (Table 52) for available
objects.
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43
Host interface
3.3.7
UM0932
MIB_ReadConfirm (0Dh)
This command is sent by the ST7580 to acknowledge an MIB_ReadRequest (see
Section 3.3.6) if the request has been accepted and executed without errors.
Table 25. MIB_ReadConfirm: Syntax
Source
Command(Args)
Possible response
ST7580
MIB_ReadConfirm(ConfirmData)
None
Table 26. MIB_ReadConfirm: ConfirmData
3.3.8
Byte index
Label
Description
1n
DATA
Current value of the MIB object with INDEX expressed in the previous
MIB_ReadRequest command (Section 3.3.6).
MIB_EraseRequest (10h)
This command is used by the external host to erase the value of an MIB object and set it to
0. This command is valid for erasable MIB objects only (Table 52).
The ST7580 checks the parameters for validation:

If the check is valid, the object is updated to a value equal to 0 in the database and the
ST7580 replies with an MIB_EraseConfirm (Section 3.3.9).

If the check is not valid, the request is rejected and the ST7580 replies with an
MIB_EraseError (Table 12).
Table 27. MIB_EraseRequest: Syntax
Source
Command(Args)
Ext. host
MIB_EraseRequest(RequestData)
Possible response
Request accepted: MIB_EraseConfirm
Request rejected: MIB_EraseError (ErrorData)
Table 28. MIB_WriteRequest: RequestData
3.3.9
Byte index
Label
Description
0
INDEX
MIB database entry index. Refer to the MIB table (Table 52) for available
objects.
MIB_EraseConfirm (11h)
This command is sent by the ST7580 to acknowledge an MIB_EraseRequest (see
Section 3.3.8) if the request has been accepted and executed without errors.
Table 29. MIB_EraseConfirm: Syntax
24/43
Source
Command(Args)
Possible response
ST7580
MIB_EraseConfirm ()
None
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UM0932
3.3.10
Host interface
PingRequest (2Ch)
This command is sent by external host to test the robustness of the local port link with the
ST7580.
If accepted, the ST7580 answers with a PingConfirm command (Section 3.3.11).
Table 30. PingRequest: Syntax
Source
Command(Args)
Possible response
External Host PingRequest(RequestData)
Request accepted: PingConfirm (ConfirmData)
Table 31. PingRequest: RequestData
3.3.11
Byte index
Label
Description
0-n
DATA
Payload with variable length
PingConfirm (2Dh)
This command is sent by the ST7580 to notify the reception of a PingRequest. The payload
field of the local frame presents the same data received in the previous PingRequest.
Table 32. PingConfirm: Syntax
Source
Command(Args)
Possible response
ST7580
PingConfirm(ConfirmData)
--
Table 33. PingConfirm: ConfirmData
3.3.12
Byte index
Label
Description
0-n
DATA
Payload with the values received in the previous PingRequest
(Section 3.3.10)
PHY_DataRequest (24h)
This command is sent by the external host to request data transmission and it exports the
PHY_Data transmission service (Section 2.3).

If accepted, the ST7580 constructs a PHY frame (Figure 2) that is transmitted over the
power line in accordance with the details expressed in RequestData field (Table 35).
A positive PHY_DataConfirm (Section 3.3.13) is generated at the end of the
transmission.

If refused, the modem generates a PHY_DataError (Table 12).
Table 34. PHY_DataRequest: Syntax
Source
Command(Args)
Possible response
External host
PHY_DataRequest(
RequestData)
Request accepted: PHY_DataConfirm (ConfirmData)
Request rejected: PHY_DataError (ErrorData)
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Host interface
UM0932
Table 35. PHY_DataRequest: RequestData
Byte index
Bit index
0
1
2
Label
Description and available values
Custom / MIB
frequency
Selection of frequency to use between MIB and custom
frequency
0: TX frequency is the high or low frequency as in PHY_Config
(Table 54) MIB object
1: TX frequency is specified in bytes [1  3] (TX frequency)
Frequency overwrite
Selection of PHY_Config MIB object overwrite (Table 54). This
field is taken into account if the Custom / MIB frequency” bit is
equal to “1” only.
0: TX frequency expressed in the following bytes (1 – 3) won't
overwrite the frequency in PHY_Config (Table 54) MIB object
1: TX frequency expressed in the following bytes (1 – 3)
overwrites frequency in PHY_Config (Table 54) MIB object
Frequency set
Selection of frequency in PHY_Config MIB object
0: TX frequency is the LowFrequency in PHY_Config MIB
object
1: TX frequency is the HighFrequency in PHY_Config MIB
object
Gain selector
Selection of TX gain for frame transmission
0: TX gain set as in PHY Config MIB object (TX Gain parameter
(Table 54))
1: TX gain is specified in the following TX gain byte (2 or 4)
0
3
4-6
Frame modulation
7
Zero crossing
synchronization
1-3
4 (or 1)
5  254
(or 1  254,
2  254,
4  254)
26/43
TX Frequency
0–4
TX Gain
5–7
Unused
Payload
Modulation of the frame to be transmitted
0: B-PSK
1: Q-PSK
2: 8-PSK
3: B-FSK
4: B-PSK coded
5: Q-PSK coded
6: Reserved
7: B-PSK coded with Peak Noise Avoidance
0: transmission frame starts on any instant
1: transmission frame start after ZC delay value defined in PHY
Config MIB object (Table 54)
Frequency value (in Hz) that the output signal is modulated
around, to be expressed if “Custom / MIB frequency” bit is
equal to “1” only.
TX gain [·] to be expressed if Gain Selector bit is equal to “1”
only.
Payload to be sent (up to 254 bytes)
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3.3.13
Host interface
PHY_DataConfirm (25h)
This command is sent by the ST7580 to provide a positive confirmation to
a PHY_DataRequest (see Section 3.3.12) previously requested by the external host.
Table 36. PHY_DataConfirm: Syntax
Source
Command(Args)
Possible response
ST7580
PHY_DataConfirm (ConfirmData)
None
Table 37. PHY_DataConfirm: ConfirmData
Byte index Bit index
Label
0–1
Max. temp.
Max temperature reached during PHY frame transmission.
0: T < 70 °C (typical)
1: 70 °C < T < 100 °C (typical)
2: 100 °C < T < 125 °C (typical)
3: T > 125 °C (typical)
2–6
Max. gain
If current control feature (MIB object PHY config 01h, Section 4.2.2) is
active, max. gain used during last transmission. If current control feature is
not active, gain used during last transmission.
7
Unused
0
0–1
Min. temp
Min. temperature reached during PHY frame transmission.
0: T < 70 °C (typical)
1: 70 °C < T < 100 °C (typical)
2: 100 °C < T < 125 °C (typical)
3: T > 125 °C (typical)
2–6
Min. gain
If current control feature (MIB object PHY Config 01h, Section 4.2.2) is
active, min. gain used during last transmission. if current control feature is
not active, gain used during last transmission.
7
Unused
1
0–6
2
7
3-4
Description
Overcurrent
Number of overcurrent events reached during PHY frame transmission.
events
Valid if the current control feature is active only.
number
Notification about the overcurrent reached during last transmission. Valid
Overcurrent whether the current control is active or not.
notification 0: max. output current [·] value not reached
1: max. output current [·] value reached
ZC delay
Delay between the last transmitted UW last bit and the mains zerocrossing (signed value), expressed in 13 µs step.
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Host interface
3.3.14
UM0932
PHY_DataIndication (26h)
This command is sent by the ST7580 device after a reception of a power line frame in
compliance with PHY frame specification (Figure 3) and it exports the PHY_Data indication
service (Section 2.4).
The command notification occurs if the modem is set at PHY layer only at MIB object
Modem Config 00h (Section 4.2.1), as in the diagram flow in Figure 5.
Table 38. PHY_DataIndication: Syntax
Source
Command(Args)
Possible response
ST7580
PHY_DataIndication (IndicationData)
None
Table 39. PHY_DataIndication: indicationData
Byte
Index
Bit
Index
0-2
0
3.3.15
Label
Description and available values
Frame modulation on the last data indication received
0: B-PSK
1: Q-PSK
2: 8-PSK
Frame modulation 3: B-FSK
4: B-PSK coded
5: Q-PSK coded
6: Reserved
7: B-PSK coded with Peak Noise Avoidance
3
RX channel
RX channel on the last data indication received
0: low channel
1: high channel
4-7
PGA value
PGA value on the last data indication received
1
SNR
SNR estimated over the Unique Word reception (signed
value, valid for PSK received frames only, equal to 255 – no
meaning – for FSK received frames)
2-3
ZC delay
Delay between the received UW last bit and the mains zerocrossing (signed value), expressed in 13 µs step
4 - 254
PHY payload
Received payload (up to 251 bytes)
DL_DataRequest (50h)
This command is sent by the external host to request data transmission and it exports the
DL_Data transmission service (Section 2.3).
28/43

If accepted, the ST7580 constructs a DL frame (Figure 3) that is transmitted over the
power line according to the details expressed in RequestData field (same format as
PHY_DataRequest,Table 35) and with automatically appended CRC field with the
format selected in MIB object Modem Config (00h, Section 4.2.1). A positive
DL_DataConfirm (Section 3.3.16) is generated at the end of the transmission

If refused, the modem generates a DL_DataError (Table 12).
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Host interface
Table 40. DL_DataRequest: Syntax
Source
Command(Args)
Possible Response
Request accepted: DL_DataConfirm
External host DL_DataRequest(RequestData) (ConfirmData)
Request rejected: DL_DataError (ErrorData)
3.3.16
DL_DataConfirm (51h)
This command is sent by the ST7580 to provide a positive confirmation to
a DL_DataRequest (Section 3.3.15) previously requested by the external host.
Table 41. DL_DataConfirm: Syntax
Source
Command(Args)
Possible response
ST7580
DL_DataConfirm (ConfirmData)
None
The ConfirmData field has the same format as for PHY_DataConfirm (see Table 37).
3.3.17
DL_DataIndication (52h)
This command is sent by the ST7580 after a reception of a power line frame in compliance
with DL frame specification (Figure 3, i.e. with a CRC correct field) and it exports the
DL_Data indication service (Section 2.4). The command notification occurs if the modem is
set for receiving DL or SS frames at MIB object Modem Config 00h (Section 4.2.1), as in the
diagram flow in Figure 5.
The IndicationData fields are the same as for PHY_DataIndication (Table 39).
Table 42. DL_DataIndication: Syntax
3.3.18
Source
Command(Args)
Possible response
ST7580
DL_DataIndication (IndicationData)
None
DL_SnifferIndication (5Ah)
This command is sent by the ST7580 after a reception of a power line frame in compliance
with DL frame specification (Figure 3, i.e. with a wrong CRC field) and it exports the
DL_Sniffer indication service (Section 2.4). The command notification occurs if the modem
is set for receiving DL or SS frames at MIB object Modem Config 00h (Section 4.2.1), as in
the diagram flow in Figure 5.
The IndicationData fields are the same as for PHY_DataIndication (Table 39). The payload
field presents the wrong CRC bytes also.
Table 43. DL_SnifferIndication: Syntax
Source
Command(Args)
Possible response
ST7580
DL_SnifferIndication (IndicationData)
None
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3.3.19
UM0932
SS_DataRequest (54h)
This command is sent by the external host to request data transmission and it exports the
SS_Data transmission service (Section 2.3).

If accepted, the ST7580 constructs an SS frame (Figure 4) that is transmitted over the
power line in accordance with the details expressed in RequestData field (Table 46).
A positive SS_DataConfirm (Section 3.3.20) is generated at the end of the
transmission.

If refused, the modem generates an SS_DataError (Table 12).
Table 44. SS_DataRequest: Syntax
30/43
Source
Command(Args)
External host
SS_DataRequest(RequestData)
Possible response
Request accepted: SS_DataConfirm
(ConfirmData)
Request rejected: SS_DataError (ErrorData)
DocID17385 Rev 3
UM0932
Host interface
Table 45. SS_DataRequest: RequestData
Byte index
Bit index
0
0
Label
Selection of frequency to use between MIB and custom frequency
Custom / MIB 0: TX frequency is the high or low frequency as in PHY_Config
frequency
(Section 4.2.2) MIB object.
1: TX frequency is specified in bytes [1  3] (TX frequency).
1
Frequency
overwrite
Selection of PHY_Config MIB object overwrite (Section 4.2.2). This field
is taken into account if the Custom / MIB frequency bit is equal to “1” only.
0: TX frequency expressed in the following bytes (1 – 3) won't overwrite
the frequency in PHY_Config (Section 4.2.2) MIB object
1: TX frequency expressed in the following bytes (1 – 3) overwrites
frequency in PHY_Config (Section 4.2.2) MIB object
2
Frequency
set
Selection of frequency in PHY_Config MIB object
0: TX frequency is the LowFrequency in PHY_Config MIB object
1: TX frequency is the HighFrequency in PHY_Config MIB object
3
4–6
7
1-3
Selection of TX gain for frame transmission
0: TX gain set as in PHY Config MIB object (TX gain parameter
Gain selector
(Section 4.2.2)).
1: TX gain is specified in the following TX Gain byte (2 or 4).
Frame
modulation
Modulation of the frame to be transmitted
0: B-PSK
1: Q-PSK
2: 8-PSK
3: B-FSK
4: B-PSK coded
5: Q-PSK coded
6: Reserved
7: B-PSK coded with Peak Noise Avoidance
Zero crossing 0: Transmission frame starts on any instant
synchronizati 1: Transmission frame start after ZC delay value defined in PHY Config
on
MIB object (Table 54)
TX frequency
4 (or 1)
Description and available values
0–4
TX gain
5–7
Unused
Frequency value (in Hz) that the output signal is modulated around, to be
expressed if “Custom / MIB frequency” bit is equal to “1” only.
TX gain to be expressed if Gain Selector bit is equal to “1” only.
5 (or 2 or 4)
Header
length
Length of header field.
If payload is not empty, it must be: 4 = Header Length = Payload length <
226).
If payload is empty, it must be: 16 = Header Length < 226).
6  231 (or
3  228,
5  230)
Header and
payload
Header and payload to be sent (from 0 to 226 byte: Header and Payload
to be sent as unique buffer).

If payload field is present, must be greater than or equal to 4

If payload field is not present, must be greater than or equal to 16.
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Host interface
3.3.20
UM0932
SS_DataConfirm (55h)
This command is sent by the ST7580 to provide a positive confirmation to
a SS_DataRequest (Section 3.3.15) previously requested by the external host.
Table 46. SS_DataConfirm: Syntax
Source
Command(Args)
Possible response
ST7580
SS_DataConfirm (ConfirmData)
None
The ConfirmData field has the same format as for PHY_DataConfirm (see Table 37).
3.3.21
SS_DataIndication (56h)
This command is sent by the ST7580 after a reception of a power line frame in compliance
with SS frame specification (Figure 4, i.e. with a CRC correct field and encrypted according
to SS_Key MIB object, Section 4.2.3) and it exports the SS_Data indication service
(Section 2.4). The command notification occurs if the modem is set for receiving SS frames
at MIB object Modem Config 00h (Section 4.2.1), as in the diagram flow in Figure 5.
Table 47. SS_DataIndication: Syntax
Source
Command(Args)
Possible response
ST7580
SS_DataIndication (IndicationData)
None
Table 48. SS_DataIndication: IndicationData
Byte
index
Bit
index
Label
Description and available values
Frame
modulation
Frame modulation on the last DataIndication received
0: B-PSK
1: Q-PSK
2: 8-PSK
3: B-FSK
4: B-PSK coded
5: Q-PSK coded
6: Reserved
7: B-PSK coded with Peak Noise Avoidance
3
RX channel
RX channel on the last DataIndication received
0: low channel
1: high channel
4–7
PGA value
PGA value on the last DataIndication received
0–2
0
1
SNR
SNR estimated over the Unique Word reception (signed value, valid for PSK
received frames only, equal to 255 – no meaning – for FSK received frames)
2–3
ZC delay
Delay between the received UW last bit and the mains zero-crossing (signed
value), expressed in 13 µs step
4 - 229
SS header
and payload
32/43
Received header and payload (up to 226 bytes)
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3.3.22
Host interface
SS_SnifferIndication (5Eh)
This command is sent by the ST7580 after a reception of a power line frame that couldn't be
decrypted through the key value stored in the MIB object SS_Key 02h (Section 4.2.3) and it
exports the SS_Sniffer indication service (Section 2.4). The command notification occurs if
the modem is set for receiving SS frames at MIB object Modem Config 00h (Section 4.2.1),
as in the diagram flow in Figure 5.
The IndicationData fields are the same as for PHY_DataIndication (Table 39). The payload
field won't present the wrong CRC bytes.
Table 49. SS_SnifferIndication: Syntax
3.3.23
Source
Command(Args)
Possible response
ST7580
SS_SnifferIndication (IndicationData)
None
CMD_SyntaxError (36h)
This command is sent by the ST758 to the external host after receiving a local frame with
the value declared in command code not corresponding to any command listed in Table 10.
Table 50. CMD_SyntaxError: Syntax
Source
Command(Args)
Possible response
ST7580
CMD_SyntaxError(ErrorData)
None
Table 51. CMD_SyntaxError:ErrorData
Byte index
0
Label
Description
ERROR Wrong command code declared in the previous local frame by external host
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Management information base (MIB)
4
UM0932
Management information base (MIB)
The management information base collects all the parameters that allow the host to set and
control the modem operation.
As explained in Section 3, the MIB objects can be directly accessed to update and read their
values through dedicated commands (Section 3.3.4, 3.3.63.3.6, and 3.3.8).
4.1
MIB table
Table 52 lists all the available MIB objects, with the related indexes, the default values and
the allowed operation (read write).
Table 52. Management information base (MIB) objects
34/43
Index
Name
Factory default value
00h
Modem configuration
11h
1
R/W
01h
PHY configuration
014FF00119400E15000002359B58h
14
R/W
02h
SS key
00000000000000000000000000000000h
16
R/W
03h
Reserved
00h
1
R
04h
Last data indication
00000000h
4
R
05h
Last TX confirm
0000000000h
5
R
06h
PHY_Data
00000000000000000000h
10
R/E
07h
DL_Data
0000000000000000h
8
R/E
08h
SS_Data
00000000000000000000h
10
R/E
09h
Host interface timeout
C8280Ah
3
R/W
0Ah
Firmware version
00420097h
4
R
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UM0932
Management information base (MIB)
4.2
MIB parameters
In this section all the MIB object is described in detail.
4.2.1
00h (Modem configuration)
This object stores the setting used to functionally configure the modem. It can be read or
written.
Table 53. MIB object 00h: MIB_WriteRequest and MIB_ReadRequest data format
Byte
index
Bit
index
Label
Factory default value
Access mode
Active layer for received frames
0: PHY layer
1: DL layer
2: SS layer
1 (DL layer)
Sniffer mode
Sniffer feature on received frames (active on DL and
SS layer only)
0: not active
1: active
0 (not active)
3-4
CRC length
CRC length on DL frames
0: 1 byte (CRC-8)
1: 2 byte (CRC-16), big endian
2: 4 byte (CRC-32), little endian
3: 4 byte (CRC-32), big endian
2
5
Reserved
Always equal to 0
0
6
DL CRC on
PHY length
Fields of DL frame (Figure 3) involved in CRC
calculation active on handled DL and SS frames only)
0: CRC calculated over DL payload only
1: CRC calculated over DL payload and PHY length
0
7
Unused
Unused value
0
0–1
2
0
4.2.2
Description and available values
01h (PHY layer configuration)
This object stores the settings used to configure the modem at physical layer. It can be read
or written.
Table 54. MIB object 01h: MIB_WriteRequest and MIB_ReadRequest data format
Byte
index
Bit
index
Label
Description and available values
Factory default value
02
High frequency
High frequency used for communication [Hz]. Any
value in CENELEC band A, B, C, D.
86000 (014FF0h)
35
Low frequency
Low frequency used for communication [Hz]. Any
value in CENELEC band A, B, C, D.
72000 (011940h)
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Management information base (MIB)
UM0932
Table 54. MIB object 01h: MIB_WriteRequest and MIB_ReadRequest data format (continued)
Byte
index
Bit
index
Label
0
RX mode
1
RX high
channel
modulation
3
TX current limiting enable flag
Current control 0: disabled
1: enabled
Factory default value
0 (high channel)
1 (PSK)
1 (PSK)
1 (enabled)
4-7
Unused
Unused bits
0-4
TX gain
Default TX gain value to be used in transmission
(when Gain Selector parameter in any DataRequestsee Table 35, is equal to 0)
5-7
Reserved
Reserved bits
0
ZC delay
If ZC delay parameter in any DataRequest is equal to
1 (Table 35), delay set during transmission between
the outgoing frame start and the mains zero-crossing
(signed value), expressed in 13 µs step
0
0-1
2-7
36/43
Functional modulation on high channel
0: FSK
1: all allowed PSK modulations
2
8-9
10
Active channels for reception
0: high channel only
1: dual channel
Functional modulation on low channel (ignored if RX
RX low channel mode is high channel only)
modulation
0: FSK
1: all allowed PSK modulations
6
7
Description and available values
0
Preamble length for PSK communication.
0: 16 bit
PSK preamble
1: 24 bit
length
2: 32 bit
3: 40 bit
Unused
Unused bits
15h (21)
2 (32 bit)
0
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Management information base (MIB)
Table 54. MIB object 01h: MIB_WriteRequest and MIB_ReadRequest data format (continued)
Byte
index
Bit
index
0-1
2
11
3–4
Label
FSK bit rate
FSK deviation
Description and available values
Factory default value
Bit rate for FSK communication.
0: 1200 bps
1: 2400 bps
2: 4800 bps
3: 9600 bps
1 (2400 bps)
Deviation for FSK communication.
0: 0.5
1: 1
1
Preamble length for FSK communication.
0: 16 bit
FSK preamble
1: 24 bit
length
2: 32 bit
3: 40 bit
2 (32 bit)
Unique word length for FSK communication.
0: 8 bit
1: 16 bit
5
FSK unique
word length
6
Reserved
Reserved bit
0
7–8
Unused
Unused bits
0
1 (16 bit)
12
FSK unique
word MSByte
FSK modulation unique word MSB (used if unique
word length is 16 bits only)
9Bh
13
FSK unique
word LSByte
FSK modulation unique word LSB
58h
4.2.3
02h (SS Key)
This object holds the key used by the SS sub-system to encrypt and decrypt transmitted and
received data. It can be read or written.
Table 55. MIB object 02h: MIB_WriteRequest and MIB_ReadRequest Data format
Byte
index
Label
0  15 SS Key
4.2.4
Description and available values
Factory default value
128-bit AES key used to process transmitted and
received frames.
00000000000000000000000000000000
04h (Last data indication)
This object stores information about the last indication message received (among
PHY_DataIndication Section 3.3.14, DL_DataIndication Section 3.3.17, SS_DataIndication
Section 3.3.21, DL_SnifferIndication Section 3.3.17, SS_SnifferIndication Section 3.3.22).
Its field values are equal to those notified by the last indication message and presented in
the four first bytes (0  3) of the IndicationData (Table 39, 48). It can be read only.
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Management information base (MIB)
UM0932
Table 56. MIB object 04h: MIB_WriteRequest and MIB_ReadRequest data format
Byte
Bit
index index
Label
Factory
default value
0–2
Frame
modulation
Frame modulation on the last indication received (Data/Sniffer,
PHY, DL, SS)
0: B-PSK
1: Q-PSK
2: 8-PSK
3: B-FSK
4: B-PSK coded
5: Q-PSK coded
6: Reserved
7: B-PSK coded with Peak Noise Avoidance
3
RX channel
RX channel on the last Indication received
0: low channel
1: high channel
0
4–7
PGA Value
PGA value on the last indication received
0
0
1
SNR
2–3
ZC Delay
4.2.5
Description and available values
SNR estimated over the Unique Word reception (signed value,
valid for PSK received frames only, equal to 255 – no meaning –
for FSK received frames)
Delay between the received UW last bit and the mains zerocrossing (signed value), expressed in 13 µs step
0
00h
0000h
05h (Last TX Confirm)
This object stores information about last confirm message received (among
PHY_DataConfirm Section 3.3.13, DL_DataConfirm Section 3.3.16, SS_DataConfirm
Section 3.3.20).
Its field values are equal to those notified by last confirm message and presented in the first
five bytes (0  2) of the ConfirmData (Table 37). It can be read only.
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Management information base (MIB)
Table 57. MIB object 05h: MIB_WriteRequest and MIB_ReadRequest data format
Byte
Bit
index index
Label
0–1
Max. temp.
2–6
Max. gain
7
Unused
0
Factory
default value
Max. temperature reached during PHY frame transmission.
0: T < 70 °C (typical)
1: 70 °C < T < 100 °C (typical)
2: 100 °C < T < 125 °C (typical)
3: T > 125 °C (typical)
0
If current control feature (MIB object PHY Config 01h, Table 54)
is active, max. gain used during the last transmission. If current
control feature is not active, gain used during last transmission.
0
0
0–1
Min. temp
Min. temperature reached during PHY frame transmission.
0: T < 70 °C (typical)
1: 70 °C < T < 100 °C (typical)
2: 100 °C < T < 125 °C (typical)
3: T > 125 °C (typical)
2–6
Min. gain
If current control feature (MIB object PHY Config 01h, Table 54)
is active, min. gain used during last transmission. If current
control feature is not active, gain used during last transmission.
7
Unused
0–6
Overcurrent
events number
Number of overcurrent events reached during PHY frame
transmission. Valid if the current control feature is active only.
0
7
Overcurrent
notification
Notification about the overcurrent reached during last
transmission. Valid whether the current control is active or not.
0: max. output current [·] value not reached
1: max. output current [·] value reached
0
ZC Delay
Delay between the last transmitted UW last bit and the mains
zero-crossing (signed value), expressed in 13 µs step
0
1
2
3-4
Description
0
0
0
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Management information base (MIB)
4.2.6
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06h (PHY Data)
This object stores counters of power line frames transmitted or received by the ST7580 in
compliance with physical frame features. It can be read or erased only.
Table 58. MIB object 06h: MIB_WriteRequest and MIB_ReadRequest Data format
Byte index
Label
0–1
Received unique word
counter
PHY valid received
frames counter
2-3
Description
Counter of preamble and unique word sequences
received
0000h
Counter of valid received PHY frame (right preamble,
UW). If the modem is set at DL or SS layer (through MIB
object Modem Configuration 00h, Section 4.2.1), it
includes any wrong and malformed frames (CRC wrong,
invalid key) also. Unsigned value.
0000h
PHY transmitted frames Counter of valid transmitted PHY frames
counter
(PHY_DataConfirm number). Unsigned value.
4-5
6–7
PHY refused
transmission counter
8-9
Network period
4.2.7
Factory
default value
0000h
Counter of refused transmissions on PHY frames
(PHY_DataError number). Unsigned value.
0000h
Mains period, expressed in 13 µs step, updated during
last reception or transmission
0000h
07h (DL Data)
This object stores counters of power line frames transmitted or received by the ST7580 in
compliance with data link frame features. It can be read or erased only.
Table 59. MIB object 07h: MIB_WriteRequest and MIB_ReadRequest data format
Byte index
Label
Description
Factory default
value
Counter of valid received DL frames (right CRC). If the
modem is set the SS layer (through MIB object Modem
Configuration 00h, Section 4.2.1), it includes any SS
wrong and malformed frames (invalid key) as well.
Unsigned value.
0000h
Counter of invalid received DL frames (wrong CRC).
Unsigned value.
0000h
0–1
DL valid received
frames counter
2-3
DL invalid received
frames counter
4-5
DL transmitted frames
counter
Counter of valid transmitted DL frames (DL_DataConfirm
number). Unsigned value.
0000h
6–7
DL refused
transmission counter
Counter of refused transmissions on DL frames
(DL_DataError number). Unsigned value.
0000h
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Management information base (MIB)
4.2.8
08h (SS Data)
This object stores counters of power line frames transmitted or received by the ST7580 in
compliance with data link frame features. It can be read or erased only.
Table 60. MIB object 08h: MIB_WriteRequest and MIB_ReadRequest Data format
Byte index
Label
Description
Factory default value
0–1
SS valid received
frames counter
Counter of valid received SS frames
(SS_DataIndication number). Unsigned value.
0000h
2–3
SS not authentic
received frames
counter
Counter of not authentic received SS frames
(wrong digest). Unsigned value.
0000h
4–5
SS malformed received Counter of malformed received SS frames
frames
(wrong length). Unsigned value.
0000h
6–7
SS transmitted frames Counter of valid transmitted SS frames
counter
(SS_DataConfirm number). Unsigned value.
0000h
SS refused
transmission counter
8-9
4.2.9
Counter of refused transmissions on SS frames
(SS_DataError number). Unsigned value.
0000h
09h (host interface timeout)
This object stores the host interface timeout values that the ST7580 can handle (Table 6). It
can be read or written.
Table 61. MIB object 09h: MIB_WriteRequest and MIB_ReadRequest Data format
Byte index
Label
0
T SR
T SR timeout value [ms]
200 (C8h)
1
T ACK
T ACK timeout value [ms]
40 (28h)
2
T IC
T IC timeout value [ms]
10 (0Ah)
4.2.10
Description and available values
Factory default value
0Ah (firmware version)
This object stores the embedded firmware version (ST internal reference). It can be read
only.
Table 62. MIB object 0Ah: MIB_WriteRequest and MIB_ReadRequest data format
Byte index
Label
Description and available values
Factory default value
0-3
FW version
FW release number (ST internal reference)
00420097h
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Reference
5
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Reference

6
STMicroelectronics, ST7580 datasheet.
Revision history
Table 63. Document revision history
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Date
Revision
Changes
04-Nov-2011
1
Initial release
23-Oct-2012
2
– Corrected parameter (length fields) at Table 6, 35, 39 and 52
– Added parameters values on Table 45
02-Oct-2013
3
– Updated Table 8 and Table 19.
– Minor modifications throughout document.
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