LSI Logic Confidential
WRREQ = 1
9-5
Copyright © 2001, 2002 by LSI Logic Corporation. All rights reserved.
9.2
WRREQ = 1
If WRREQ is set in the Secondary Bitstream Control register, the
SBP_REQ pin is defined as a DMA write request and the SBP_RD pin
is redefined as a DMA read request.
9.3
FRAME Pin Transfers
Secondary bitstream transfers optionally can be framed with the
SBP_FRAME pin as follows:
•
The SBP_FRAME signal is asserted with the first byte of an
incoming or outgoing packet and is deasserted with the next byte of
the packet.
•
The size of Secondary Bitstream packets is specified by the
PACKSIZE register.
9.3.1
Outgoing FRAME Transfers
shows outgoing transfers using SBP_FRAME.
Figure 9.4
Outgoing FRAME Transfers
For outgoing FRAME transfers, the following occurs:
•
SBP_FRAME is asserted on the first clock of all outgoing packets
(outgoing transfers are assumed to start on a packet boundary).
d0
d1
SBP_CLK (I)
SBP_FRAME (O)
SBP_REQ (O)
SBP_ACK (I)
SBP_DATA (O)
SBP_RD (O)
d2
d3
d4
d5
d6
Содержание DMN-8600
Страница 14: ...LSI Logic Confidential xiv Contents Copyright 2001 2002 by LSI Logic Corporation All rights reserved ...
Страница 18: ...LSI Logic Confidential xviii Copyright 2001 2002 by LSI Logic Corporation All rights reserved ...
Страница 64: ...LSI Logic Confidential 7 6 Memory Mapping Copyright 2001 2002 by LSI Logic Corporation All rights reserved ...