Parameter Value
Memory type DDR4
DRAM bus width 64 bit
ECC Enabled
DRAM chip bus width 16 bits
DRAM chip capacity 4096-8192 Mbits
Bank group address count 1
Rank address count 0
Bank address count 2
Row address count 15-16
Column address count 10
Speed bin DDR4 2400T
Operating frequency 1200 MHz
CAS latency 17
CAS write latency 12
Additive latency 0
RAS to CAS delay 17
Precharge time 17
tRC 46.16 ns
tRASmin 32 ns
tFAW 30 ns
Table 26: DDR4 SDRAM Parameters
2.16 QSPI Flash
The QSPI flash can be used to boot the PS, and to store the FPGA bitstream, ARM application code and
other user data.
2.16.1 QSPI Flash Type
Table 27 describes the memory availability and configuration on the Mercury+ XU1 SoC module.
As there is one QSPI flash chip equipped on the Mercury+ XU1 SoC module, type “single” must be selected
when programming the flash from Vivado tools.
D-0000-428-001 39 / 66 Version 13, 15.08.2019
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