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3–70 User Guide Version 11.1 Altera Corporation
PCI Compiler October 2011
Target Mode Operation
Figure 3–18 shows the same transaction as in Figure 3–16 with the local
side inserting a wait state. The 64-bit extension signals are not applicable
to the pci_mt32 and pci_t32 functions. The local side deasserts
lt_rdyn in clock cycle 7. The function shows that deasserting lt_rdyn
in clock cycle 7 suspends the local side data transfer in clock cycle 8 by
deasserting lt_dxfrn. Because the local side is unable to accept
additional data in clock cycle 8, the function deasserts trdyn in clock
cycle 8 as well, preventing PCI data from being transferred from the
master device.
Figure 3–18. Burst Memory Write Target Transaction with Local-Side Wait State
Note to Figure 3–18:
(1) This signal is not applicable to either the pci_mt32 or pci_t32 MegaCore functions.
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_rdyn
lt_ackn
l_dato[31..0]
lt_dxfrn
(1) l_ldat_ackn
(1) l_hdat_ackn
clk
(1) l_dato[63..32]
l_beno[3..0]
(1) l_beno[7..4]
lt_tsr[11..0]
Adr
7
Adr-PAR
Adr
7
BE0_L
BE0_H
000 381
D0_L
D0_H
D0_L
D0-L-PAR
D0-H-PAR
BE0_L
000781
D1_L
D2_L D3_L
D1_H D2_H D3_H
D1_H
D2_H
D1_L D2_L D3_L
D3_H
D1-L-PAR
D1-H-PAR
D2-L-PAR
D2-H-PAR
D3-L-PAR
D3-H-PAR
D0_H
234567 9
10
128111 13 14
781381
BE1_L
BE2_L
BE3_L
BE1_H
BE2_H
BE3_H
BE1_L
BE2_L BE3_L
BE1_H
BE2_H
BE3_H
BE0_H
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