GL813 Datasheet, PDF (18/24 Pages) List of Unclassifed Manufacturers – USB 2.0 CompactFlash Card Reader Controller

GL813 - USB2.0 CompactFlash Card Reader Controller
5.2.2 Receive Timing for Data Packet (with CRC-16)
CLKOUT
RXACTV
Data
RXVLD
RXERR
DP/DM
PID Data Data Data Data CRC CRC
SYNC PID Data Data Data Data CRC CRC EOP
Note that the USB 2.0 transceiver does not decode Packet ID’s (PIDs). They are passed
to the SIE for decoding.
This timing example is in HS mode. When a HS/FS UTM is in FS mode there are
approximately 40 clock cycles every byte time. The Receive State Machine assumes that
the SIE captures the data on the data bus if RXACTV and RXVLD are asserted. In FS
mode, RXVLD will only be asserted for one clock per byte time.
Note that the receive and transmit sections of the transceiver operate independently. The
receiver will receive any packets on the USB. The transceiver does not identify whether
the packet that it is receiving from the upstream or the downstream port. The SIE must
ignore receive data while it is transmitting.
©2001-2002 Genesys Logic Inc.—All rights reserved.
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