KAD/UBM/104 8 Channel Serial Bus Monitor Parser

The KAD/UBM/104 is an eight-channel serial bus monitor which combines the capabilities of a coherent message parser with the flexibility of an iNET-X packetizer and an error-detection function, on a single module.

The module operates in ABI, ACE-CCDL, or ACB bus monitoring modes. The parser parses up to 256 messages and their associated time and status tags. Each message has a stale bit (word read before) and skipped bit (buffer overwritten). ABI messages can be parsed based on their bus number, frame preamble ID and/or address fields. ACB messages can be parsed based on their bus number, message request function code, and starting address.

Every message received from each of the eight busses is captured and packetized, along with the time tags and a bus tag, with other received messages in a packetized buffer. The packetizer contents can be assembled into Ethernet frames by an iNET-X controller or transmitter, for example, the KAD/BCU/140, for transmission over Ethernet.

To ensure efficient use of the bandwidth, the packets are only generated once an iNET-X payload size threshold has been reached. Additionally, a programmable timeout ensures that smaller packets are generated even during periods of low activity on the bus, thereby allowing real-time analysis and processing of the acquired messages. When there is no traffic, no packets are generated.