Altera PCI Compiler - Manual (Page 159)

Altera Corporation User Guide Version 11.1 3–85
October 2011
Functional Description
Figure 3–27 shows an example of a disconnect during a 32-bit read on
QWORD aligned addresses. The PCI MegaCore function completes and
does not disconnect even though lt_discn is asserted. This is an
expected behavior of the PCI MegaCore function.
Figure 3–29. 32-bit PCI & 64-bit Local Side Disconnect on QWORD Aligned Address
ad[31..0]
(1) ad[63..32]
cben[3..0]
(1) cben[7..4]
par
(1) par64
framen
(1) req64n
irdyn
devseln
(1) ack64n
trdyn
stopn
lt_framen
l_adro[31..0]
l_cmdo[3..0]
lt_ackn
l_adi[31..0]
lt_dxfrn
clk
(1) l_adi[63..32]
l_beno[3..0]
(1) l_beno[7..4]
lt_tsr[11..0]
Adr
6
Adr-PAR
Z
Adr
6
Z
BE0_L
BE0_H
Z
000 101
D0_L
D0_H
D0-L-PAR
D0-H-PAR
000 501
1 2 3 4 5 6 7 8 9 10
D0_L
D0_H
lt_rdyn
BE0_L
BE0_H
lt_discn