Siemens KNX EIB TP-UART 2-IC - Page 26

GAMMA instabus
Release: February 2012
KNX EIB TP-UART 2-IC
Technical Manual pages 42 Siemens AG
Infrastructure and Cities Sector,
Building Technologies
page 26 © Siemens AG 2012 Control Products and Systems
Subject to change without further notice. P. O. Box 10 09 53,
D-93009 Regensburg
3.2.3.1.9 U_L_Data-Services
The U_L_Data-Services are used to transfer the complete EIB-Linklayer-Frame (L_Data.request and
L_PollData.request) to the TP-UART.
If the host sends a second frame (the first frame buffer is yet active) the TP-UART rejects this and
reports it with a Status.indication (PE bit set).
immediate Ack
1. Databyte
U_LDATA_Start
TP-UART
U_LDATA_End
U_LDATA_Cont(2)
U_LDATA_Cont(1)
Chksum
2. Databyte
1. Databyte
Ctrl-Byte
L_DATA_Cofirm
Chksum
2. Databyte
Ctrl-Byte
.
.
.
.
.
.
.
EIB
HOST
Fig. 14: TP-UART send telegram