Siemens KNX EIB TP-UART 2-IC Manual page 26

GAMMA instabus
Release: February 2012
KNX EIB TP-UART 2-IC
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).
HOST
U_LDATA_Start
U_LDATA_Cont(1)
U_LDATA_Cont(2)
.
.
.
U_LDATA_End
Ctrl-Byte
1. Databyte
2. Databyte
.
Chksum
.
L_DATA_Cofirm
Fig. 14: TP-UART send telegram
Technical Manual
page 26
TP-UART
pages 42
© Siemens AG 2012
Subject to change without further notice.
Ctrl-Byte
1. Databyte
2. Databyte
.
.
Chksum
immediate Ack
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