Application Note: Rs-485 Packet Examples; Three-Byte Response Packet Read From Skb - Low Speed - JDS Uniphase SKB Series User Manual

82 Application Notes
9. The /SOP line is de-asserted (high) to indicate end of packet.
Figure 16: Three-byte response packet read from SKB – low speed

APPLICATION NOTE: RS-485 Packet Examples

The intent of this application note is to provide detailed information regarding RS-485 link layer pack-
ets and generating a CRC-16.
The SKB implements a differential-signal RS-485 network protocol which is capable of connecting 32
unit load devices (one bus master and up to 31 SKB slaves). The network layer of the RS-485 proto-
col is handled by transceivers connected to the UART of the SKB. Transmitting and receiving RS-
485 differential data is transparent to the user. The remaining network protocol is largely imple-
mented by sending and receiving data in RS-485 link-layer packets.