19/23

SERCON816

For master mode (SCMASTER = 1) the control words are coded as follows:

Index

Bit

Name

Function

0

0

HS_MDT

Handshake-bit in MDT

1

L/S_MDT

Read/write in MDT

2

END_MDT

End in MDT

3-5

ELEM_MDT

Data element type in MDT

6

SETEND

END_MDT is to be set

7

M_BUSY

Service container waits for interaction of microprocessor

(M_BUSY = 1)

8-9

NINFO_WRITE

Number of info words in write buffer (1 to 4)

10-11

(Not used)

12

INT_ERR

Slave reports error

13

INT_END_WRBUF

End of write buffer is reached

14

INT_END_RDBUF

End of read buffer is reached

15

(Not used)

1

0

HS_AT

Handshake bit in AT

1

BUSY_AT

Busy bit in AT

2

ERR_AT

Error bit in AT

3

CMD_AT

Command modification bit in AT

4-6

(Not used)

7

RECERR

Last transmission was correct (0) or erroneous (1)

8-9

NINFO_READ

Number of info words in read buffer (1 to 4)

10-15

(Not used)

2

0-7

WRDATPT

Pointer to present position in write buffer

8-15

WRDATLAST

Pointer to last position in write buffer

3

0-7

RDDATPT

Pointer to present position in read buffer

8-15

RDDATLAST

Pointer to last position in read buffer

4

0-7

ERR_CNT

Error counter

8

BUSY_CNT

Error counts differences of handshake (0) or BUSY cycles (1)

9

INT_SC_ERR

Interrupt due to protocol error

10

INT_HS_TIMEOUT

Interrupt due to handshake timeout

11

INT_BUSY_TIMEOUT

Interrupt BUSY timeout

12

INT_CMD

Slave has set command modification bit

13-15

(Not used)