SERC816 データシートの表示（PDF） - STMicroelectronics

部品番号

コンポーネント説明

メーカー

SERC816

SERCOS INTERFACE CONTROLLER

STMicroelectronics 

SERCON816

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:

Index

0

1

2

3

4

Bit

0

1

2

3

4-6

7

8-9

10-11

12

13

14

15

0

1

2

3-5

6

7

8-9

10-15

0-7

8-15

0-7

8-15

0-8

9

10-15

Name

HS_AT

BUSY_AT

ERR_AT

CMD_AT

ELEM

L/S

NINFO_WRITE

INT_ELEM_CHANGE

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

Function

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)

Master has modified data element or read/write

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 erroneous (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)

20/23

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