
Altera Corporation User Guide Version 11.1 3–99
October 2011
Functional Description
Figure 3–32 shows the same transaction as in Figure 3–31, but the local
side master interface requests a 32-bit transaction by asserting
lm_req32n. This figure applies to both pci_mt64 and pci_mt32,
excluding the 64-bit extension signals as noted for pci_mt32. The
pci_mt64 function does not assert req64n on the PCI side. Therefore,
the upper address ad[63..32] and the upper command/byte enables
cben[7..4] are invalid.
Figure 3–32. 32-Bit PCI & 32-Bit Local-Side Master Burst Memory Read Transaction
Note to Figure 3–32:
(1) This signal is not applicable to the pci_mt32 MegaCore function.
2
3
4
5
6
7
9
10
12
clk
reqn
8
11
1
gntn
ad[31..0]
(1)
ad[63..32]
cben[3..0]
(1)
cben[7..4]
par
(1)
par64
framen
(1)
req64n
irdyn
devseln
(1)
Êack64n
trdyn
stopn
Adr
6
Adr-PAR
BE_L
Z
D0_L
Z
0
0
Z
D1_L
D2_L
13
Z
D0-L-PAR
D2-L-PAR
D1-L-PAR
l_dato[31..0]
D0_L
D1_L
D2_L
(1)
l_dato[63..32]
lm_req32n
lm_lastn
lm_adr_ackn
lm_rdyn
lm_tsr[9..0]
000
001
004
002
108
008
000
l_ldat_ackn
l_hdat_ackn
lm_ackn
lm_dxfrn
l_adi[31..0]
l_cbeni[3..0]
(1)
l_cbeni[7..4]
Adr
BE_L
6
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