NCN5121_16 Datasheet, PDF (41/58 Pages) ON Semiconductor – Transceiver for KNX Twisted Pair Networks

NCN5121
Host Ctrl
NCN5121
U_L_DataStart .req
1000 000 0
Control Byte
xx xx xxx x
U_L_DataCont .req
10 i i i i i i
Data Octet 1
xx xx xxx x
KNX Bus
U_L_DataOffSet .req
00001 i i i
U_L_DataCont .req
10 i i i i i i
Data Octet N
xx xx xxx x
w2.6ms silence
U_L_DataEnd .req
01 l l l l l l
Checksum
xx xx xxx x
L_Data . ind
x 0 r 1 p1 p0 0 0
Data Octet 1
xx xx xxx x
Data Octet N
xx xx xxx x
Checksum
xx xx xxx x
L_Data .con
x 000 101 1
Control Byte
x xxxx xx x
Data Octet 1
x xxxx xx x
Data Octet N
x xxxx xx x
Checksum
x xxxx xx x
Immediate Ackn
x xxxx xx x
Figure 45. Send Frame, 9−bit UART Mode, Frame End with Silence, No CRC−CCITT
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