User Manual

GAMMA instabus

Release: February 2012

KNX EIB TP-UART 2-IC

Siemens AG pages 42 Technical Manual

Infrastructure and Cities Sector,

Building Technologies

Control Products and Systems © Siemens AG 2012 page 25

P. O. Box 10 09 53, Subject to change without further notice.

D-93009 Regensburg

Interchargap (2Bit)

Parity

1 Startbit 1 Stopbit 8 Datenbits 15 Bit Pause

Addresstype TPCI Checksum Ack

Receive from Bus 6 7 p s s 0 1 2 3 4 5 6 7 p s s 0 1 2 3 4 5 6 7 p s s 0 1 2 3 4 5 6 7 p s s 0 1 2 3 4 5 6 7 p s

Addresstype TPCI Checksum

Send to Controller p s s 0 1 2 3 4 5 6 7 p s s 0 1 2 3 4 5 6 7 p s s 0 1 2 3 4 5 6 7 p s s 0 1 2 3 4 5 6 7 p s

Ack-Information

Rec from Controller s 0 1 2 3 4 5 6 7 p s

Send to Bus s 0 1 2 3 4 5 6 7 p s

Time for Addresssearch (17 Bit)

1 Bit Buffertime 1 Bit Buffertime

Fig. 12: Timing for send U_AckInfo (e.g. 9600 Baud)

Addressed

BUSY Mode

or BUSY

Yes

Send BUSYSend ACK

Yes

TPUART detects

any frame error

Yes

U_Ackinfo Service or TPUART internal addresscheck

NACK

Yes

Nein

Send NACK

Fig. 13: Ack / Nack / Busy Generation of the TP-UART