sercon410b STMicroelectronics, sercon410b Datasheet - Page 32

• Manufacturer Part Number: sercon410b
• Description: Sercos Interface Controller
• Manufacturer: STMicroelectronics

SERCON410B
DATA STRUCTURES WITHIN THE RAM (Continued)
The coding of the five control words depends on the mode of the service channel. Using the slave mode
(SCMASTER = 0) they have the following structure:
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Index
0
1
2
3
4
10-11
10-15
10-15
8-15
8-15
4-6
8-9
3-5
8-9
0-7
0-7
0-8
Bit
12
13
14
15
0
1
2
3
7
0
1
2
6
7
9
HS_AT
BUSY_AT
ERR_AT
Error bit in AT
ELEM
L/S
NINFO_WRITE
INT_ELEM_CHANGE Master has modified data element or read/write
INT_END_WRBUF
INT_END_RDBUF
INT_END_MDT
HS_MDT
L/S_MDT
END_MDT
ELEM_MDT
RECERR
NINFO_READ
WRDATPT
WRDATLAST
RDDATPT
RDDATLAST
INT_SC_ERR
Name
Handshake bit in AT
Busy bit in AT, also waiting for microprocessor interaction
Error bit in AT
Command modification bit in AT
Data element of present transmission
Read (0)/write (1) of present transmission
Number of info words in write buffer (1 to 4)
(Not used)
End of write buffer is reached
End of read buffer is reached
Master reports end via END_MDT-bit
Handshake bit in MDT
Read/write in MDT
End bit in MDT
Data element in MDT
(Not used)
Last transmission was correct (0) or errorneous (1)
Number of info words in read buffer (1 to 4)
(Not used)
Pointer to present position in write buffer
Pointer to last position in write buffer
Pointer to present position in read buffer
Pointer to last position in read buffer
(Not used)
Interrupt due to protocol error
(Not used)
Function