NCN5130_16 Datasheet, PDF (35/58 Pages) ON Semiconductor – Transceiver for KNX Twisted Pair Networks

NCN5130
Bus Monitor Service
Activate bus monitoring state.
In this mode all data received from the KNX bus is sent to the host controller without performing any filtering on Data Link
Layer. Acknowledge Frames are also transmitted transparently. This state can only be exited by the Reset Service (see p34).
Host Ctrl
NCN5130
KNX Bus
U_Busmon.req
0 000 0 10 1
KNX Message
xxx xx x xx
KNX Message
xx x xxx xx
KNX Message
xxx xx x xx
Acknowledge
xx 00x x00
U_Reset.req
0 000 0 00 1
U_Reset.ind
0 000 0 01 1
KNX Message
xx x xxx xx
Acknowledge
xx 00x x00
Figure 35. Bus Monitor Service
Remark:
x = don‘t care
Set Address Service
Sets the physical address of the device and activates the auto−acknowledge function.
NCN5130 starts accepting all frames whose destination address corresponds to the stored physical address or whose
destination address is the group address by sending IACK on the bus. In case of an error detected during such frame reception,
NCN5130 sends NACK instead of IACK.
When issued several times after each other, the first call will set the physical address and activate the auto−acknowledge.
Following calls will only set the physical address because auto−acknowledge is already activated.
NCN5130 confirms activation of auto−acknowledge function by sending the U_Configure.ind service to the host controller.
Host Ctrl
NCN5130
U_SetAddress .req
1 1 11 0 00 1
Address High Byte
xx x xx x xx
Address Low Byte
xx x xx x xx
Dummy
xx x xx x xx
KNX Bus
U_Configure .ind
0 b aa ap c m 0 1
Figure 36. Set Address Service
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