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Table 6: DDR4 Memory 72-bit I/F to FPGA U1 Banks 64, 65, and 66 (cont'd)
FPGA (U1) Pin Schematic Net
Name
I/O Standard
Component Memory
Pin #
Pin Name
Ref. Des.
BE54
PL_DDR4_BA0
SSTL12_DCI
N2
BA0
U17-U19 U73-U74
BE53
PL_DDR4_BA1
SSTL12_DCI
N8
BA1
U17-U19 U73-U74
BG54
PL_DDR4_BG0
SSTL12_DCI
M2
BG0
U17-U19 U73-U74
BG53
PL_DDR4_WE_B
SSTL12_DCI
L2
WE_B/A14
U17-U19 U73-U74
BJ54
PL_DDR4_RAS_B
SSTL12_DCI
L8
RAS_B/A16
U17-U19 U73-U74
BH54
PL_DDR4_CAS_B
SSTL12_DCI
M8
CAS_B_A15
U17-U19 U73-U74
BK53
PL_DDR4_CK_T
DIFF_SSTL12_DCI
K7
CK_T
U17-U19 U73-U74
BK54
PL_DDR4_CK_C
DIFF_SSTL12_DCI
K8
CK_C
U17-U19 U73-U74
BH52
PL_DDR4_CKE
SSTL12_DCI
K2
CKE
U17-U19 U73-U74
BG52
PL_DDR4_ACT_B
SSTL12_DCI
L3
ACT_B
U17-U19 U73-U74
BJ53
PL_DDR4_TEN
SSTL12_DCI
N9
TEN
U17-U19 U73-U74
BJ52
PL_DDR4_ALERT_B
SSTL12_DCI
P9
ALERT_B
U17-U19 U73-U74
BL48
PL_DDR4_PARITY
SSTL12_DCI
T3
PAR
U17-U19 U73-U74
BH50
PL_DDR4_RESET_B
LVCMOS12
P1
RESET_B
U17-U19 U73-U74
BH49
PL_DDR4_ODT
SSTL12_DCI
K3
ODT
U17-U19 U73-U74
BP49
PL_DDR4_CS_B
SSTL12_DCI
L7
CS_B
U17-U19 U73-U74
The VCU128 DDR4 memory component interfaces adhere to the constraints guidelines
documented in the “DDR3/DDR4 Design Guidelines” section of the UltraScale Architecture-Based
FPGAs Memory IP LogiCORE IP Product Guide (
). The VCU128 board DDR4 memory
component interface is a 40Ω impedance implementation.
For more information on the internal VREF, see the “Supply Voltages for the SelectIO Pins VREF”
and the “Internal VREF” sections in the UltraScale Architecture SelectIO Resources User Guide
(
). For more details about the Micron DDR4 component memory, see the Micron
MT40A512M16LY data sheet at the
website.
RLD3 Component Memory
, callout 5]
The 288 MB RLD3 72-bit wide component memory system is comprised of two 36-bit 1.125 Gb
RLDRAM3 devices located at U39 and U37.
• Manufacturer: Micron
• Part Number: MT44K32M36RB-107E
• Description:
○
1.125 Gb (32 Mb x 36)
Chapter 3: Board Component Descriptions
UG1302 (v1.1) April 21, 2021
VCU128 Board User Guide
24