11 | Keysight | Serial Bus Options for InfiniiVision X-Series Oscilloscopes - Data Sheet
Specifications/Characteristics (Continued)
USB 2.0 low- and full-speed specifications/characteristics (DSOX4USBFL and DSOX6USBFL)
USB input source (D+ & D-)
Analog channels 1, 2, 3, 4
Digital channels D0-D15
Speed
Low (1.5 Mb/s) and Full (12 Mb/s)
Triggering
Start of packet (SOP)
End of packet (EOP)
Suspend – when bus is idle for > 3 ms
Resume – when exiting an idle state > 10 ms
Reset – when SE0 is > 10 ms
Token packet with specified content
Data packet with specified content
Handshake packet with specified content
Special packet with specified content
All errors – any of the below error conditions
PID error – if packet type field does not match check field
CRC5 error – if 5 bit CRC error is detected
CRC16 error – if 16 bit CRC error is detected
Glitch error – if two transitions occur in half a bit time
Bit stuff error – if >6 consecutive “ones” are detected
SE1 error – if SE1 > 1 bit time
Hardware-based decode
– Base format
– Token packets (excluding SOF, 3 bytes)
Hex, Binary, ASCII, or Decimal data decode
PID (yellow, “OUT”, “IN”, “SETUP”, “PING”)
PID Check (yellow when valid, red when error detected) – numeric value
Address (blue, 7 bits)
Endpoint (green, 4 bits)
CRC (blue when valid, red when error detected, 5 bits)
PID (yellow, “SOF”)
– Token packets (SOF, 3 bytes)
PID Check (yellow when valid, red when error detected, 5 bits)
Frame (green, 11-bits) – the frame number
CRC (blue when valid, red when error detected, 5 bits)
PID (yellow, “DATA0”, “DATA1”, DATA2”, “MDATA”)
PID Check (yellow when valid, red when error detected, 16 bits)
PID (yellow, “ACK”, “NAK”, “STALL”, “NYET”, “PRE”, “ERR”)
PID Check (yellow when valid, read when error detected) – numeric value
Hub Addr (green, 7 bits)
– Data packets (3 to 1027 bytes)
– Handshake packets (1 byte)
SC (blue, 1 bit)
Port (green, 7 bits)
S & E|U (blue, 2 bits)
ET (green, 2 bits)
CRC (blue when valid, red when error detected, 5 bits
USB low-full-speed plus one other serial bus (including another USB bus)
– Multi-bus analysis
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