TR5-Lite User Manual
78
June 20, 2018
If
LED1
or
LED2
do not start blinking after releasing BUTTON0, it indicates local_init_done or
local_cal_success of the corresponding DDR3 failed.
If
LED1
or
LED2
fail to remain on after 13 seconds, the corresponding DDR3 test has failed.
Press
BUTTON0
again to regenerate the test control signals for a repeat test.
Table 6-2
LED Indicators
NAME
Description
LED0
Reset
LED1
If lit, DDR3 (A) test pass
LED2
If lit, DDR3 (B) test pass
LED3
Blinks
6
6
.
.
3
3
D
D
D
D
R
R
3
3
S
S
D
D
R
R
A
A
M
M
T
T
e
e
s
s
t
t
b
b
y
y
N
N
i
i
o
o
s
s
I
I
I
I
Many applications use a high performance RAM, such as a DDR3 SDRAM, to provide temporary
storage. In this demonstration hardware and software designs are provided to illustrate how to
perform DDR3 memory access in QSYS. We describe how the Altera’s “DDR3 SDRAM Controller
with UniPHY” IP is used to access a DDR3-SDRAM, and how the Nios II processor is used to read
and write the SDRAM for hardware verification. The DDR3 SDRAM controller handles the
complex aspects of using DDR3 SDRAM by initializing the memory devices, managing SDRAM
banks, and keeping the devices refreshed at appropriate intervals.
System Block Diagram
shows the system block diagram of this demonstration. The system requires a 50 MHz
clock provided from the board. The DDR3 controller is configured as a 1 GB DDR3-666.667
controller. The DDR3 IP generates one 666.667 MHz clock as SDRAM’s data clock and one
quarter-rate system clock 666.667/4=166.666 MHz for those host controllers, e.g. Nios II processor,
accessing the SDRAM. In the QSYS, Nios II and the On-Chip Memory are designed running with
the 166.666 MHz clock, and the Nios II program is running in the on-chip memory.
Содержание TR-5 Lite FPGA
Страница 1: ...TR5 Lite User Manual 1 www terasic com June 20 2018...
Страница 71: ...TR5 Lite User Manual 71 www terasic com June 20 2018 Figure 5 9 CDCM 61004 Demo Figure 5 10 Si570 Demo...
Страница 85: ...TR5 Lite User Manual 85 www terasic com June 20 2018 Figure 7 5 Transceiver Loopback Test in Progress...