Qspi Flash; Qspi Flash Characteristics; Signal Description - Enclustra Mercury+ XU7 User Manual

Parameter
Memory device interface speed
Reference input clock speed
Memory part
Data width
Data mask and DBI
CAS latency
CAS write latency
Table 26: DDR4 SDRAM (PL) Parameters
13 14
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 Characteristics

Table 27 describes the memory availability and configuration on the Mercury+ XU7 SoC module.
As there is one QSPI flash chip assembled on the Mercury+ XU7 SoC module, type "single" must be
selected when programming the flash from Vivado tools.
Flash Type
S25FL512S
Table 27: QSPI Flash Characteristics
Tip
Different flash memory devices may be assembled in future revisions of the Mercury+ XU7 SoC module.
Any flash memory with a different speed and temperature range fulfilling the requirements of the
module variant may be used.
2.16.2

Signal Description

The QSPI flash is connected to the PS MIO pins 0 to 5. Some of these signals are available on the module
connector, allowing the user to program the QSPI flash from an external source.
The reset of the QSPI flash is connected to the PS_POR#_LS power‐on reset signal.
Refer to Section 3 for details on programming the flash memory.
13
An exact period of 10'000 ps may not be achievable. The clock speed closest to the desired frequency should be selected.
14
The memory devices assembled on the module may not be available in Vivado. In this case, a similar memory part with
compatible timing requirements should be selected.
D‐0000‐443‐001
Value
833 ps
13
10'000 ps ﴾100 MHz﴿
MT40A256M16 / MT40A512M16
32 bit
DM NO DBI
17 cycles
12 cycles
Size
512 Mbit
38 / 61
14
Manufacturer
Cypress ﴾Spansion﴿
Version 10, 30.01.2024