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UG473 (v1.11) November 12, 2014
Block RAM and FIFO ECC Port Descriptions
Figure 3-3 shows the FIFO36E1 ECC primitive. The FIFO36_72 mode only supports
standard ECC mode and does not support the RDADDRECC output.
Block RAM and FIFO ECC Port Descriptions
Table 3-1 lists and describes the block RAM ECC I/O port names.
X-Ref Target - Figure 3-3
Figure 3-3: FIFO36_72 Mode: FIFO ECC
SBITERR
DI[63:0]
RST
WRCLK
DIP[7:0]
ECCPARITY[7:0]
DBITERR
DO[63:0]
DOP[7:0]
WREN
RDEN
RDCLK
INJECTSBITERR
INJECTDBITERR
UG473_c3_03_052610
FIFO36E1
EMPTY
FULL
ALMOSTEMPTY
ALMOSTFULL
RDERR
WRERR
RDCOUNT[8:0]
WRCOUNT[8:0]
Table 3-1: RAMB36E1 Port Names and Descriptions Including ECC Ports
Port Name Signal Description
DIADI[31:0] Port A data inputs addressed by ADDRBWRADDR in ECC mode. See Table 1-13 for SDP
mode port name mapping.
DIPADIP[3:0] Port A data parity inputs addressed by ADDRBWRADDR in ECC mode. See Table 1-13 for
SDP mode port name mapping.
DIBDI[31:0] Port B data inputs addressed by ADDRBWRADDR. See Table 1-13 for SDP mode port name
mapping.
DIPBDIP[3:0] Port B data parity inputs addressed by ADDRBWRADDR. See Table 1-13 for SDP mode port
name mapping.
ADDRARDADDR [15:0] Port A address input bus. In RAM_MODE = SDP, this is the RDADDR bus. In ECC mode
only bits [14:6] are used.
ADDRBWRADDR[15:0] Port B address input bus. In RAM_MODE = SDP, this is the WRADDR bus. In ECC mode
only bits [14:6] are used.
WEA[3:0] Port A byte-wide Write enable. Not used in RAM_MODE = SDP. In ECC mode, connect WEA
to GND.
WEBWE[7:0] Port B byte-wide Write enable (WEBWE [3:0]). In RAM_MODE = SDP, this is the byte-wide
Write enable. In ECC mode, connect this port to a logic High.
ENARDEN Port A enable. In RAM_MODE = SDP or ECC, this is the RDEN.
ENBWREN Port B enable. In RAM_MODE = SDP or ECC, this is the WREN.
RSTREGARSTREG Synchronous output register set/reset as initialized by SRVAL_A (DO_REG = 1).
RSTREG_PRIORITY_A determines the priority over REGCE. In RAM_MODE = SDP, this is
the RSTREG. In ECC mode, connect RSTREGARSTREG to GND.
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