11 | Keysight | Serial Bus Options for InfiniiVision X-Series Oscilloscopes - Data Sheet

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

Hex, Binary, ASCII, or Decimal data decode

– Token packets (excluding SOF, 3 bytes)

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)

– Token packets (SOF, 3 bytes)

PID (yellow, “SOF”)

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)

– Data packets (3 to 1027 bytes)

PID (yellow, “DATA0”, “DATA1”, DATA2”, “MDATA”)

PID Check (yellow when valid, red when error detected, 16 bits)

– Handshake packets (1 byte)

PID (yellow, “ACK”, “NAK”, “STALL”, “NYET”, “PRE”, “ERR”)

PID Check (yellow when valid, read when error detected) – numeric value

Hub Addr (green, 7 bits)

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

– Multi-bus analysis

USB low-full-speed plus one other serial bus (including another USB bus)

Specifications/Characteristics (Continued)