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RLDRAM II Controller
MegaCore Function User Guide
MegaCore Version: 9.1
Document Date: November 2009
Copyright © 2009 Altera Corporation. All rights reserved. Altera, The Programmable Solutions Company, the stylized Altera logo, specific device designations, and all other words and logos that are identified as trademarks and/or service marks are, unless noted otherwise, the trademarks and
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UG-RLDRAM-8.1
ii MegaCore Version 9.1 Altera Corporation
RLDRAM II Controller MegaCore Function User Guide
Contents
Chapter 1. About This MegaCore Function
Release Information ............................................................................................................................... 1–1
Device Family Support ......................................................................................................................... 1–1
Features ................................................................................................................................................... 1–2
General Description ............................................................................................................................... 1–2
OpenCore Plus Evaluation .............................................................................................................. 1–4
Performance and Resource Utilization ............................................................................................... 1–4
Chapter 2. Functional Description
Block Description ................................................................................................................................... 2–1
Control Logic .................................................................................................................................... 2–2
Datapath ............................................................................................................................................ 2–3
OpenCore Plus Time-Out Behavior ............................................................................................. 2–12
Device-Level Configuration ............................................................................................................... 2–12
PLL Configuration ......................................................................................................................... 2–12
Example Design .............................................................................................................................. 2–14
Constraints ...................................................................................................................................... 2–16
Interfaces ............................................................................................................................................... 2–16
Initialization .................................................................................................................................... 2–16
Writes ............................................................................................................................................... 2–17
Reads ................................................................................................................................................ 2–19
Refreshes .......................................................................................................................................... 2–21
Signals ................................................................................................................................................... 2–22
Parameters ............................................................................................................................................ 2–28
Memory ............................................................................................................................................ 2–29
Timing .............................................................................................................................................. 2–31
Project Settings ................................................................................................................................ 2–32
MegaCore Verification ........................................................................................................................ 2–33
Simulation Environment ............................................................................................................... 2–33
Hardware Testing ........................................................................................................................... 2–33
Chapter 3. Getting Started
Design Flow ............................................................................................................................................ 3–1
RLDRAM II Controller Walkthrough ................................................................................................. 3–2
Create a New Quartus II Project .................................................................................................... 3–3
Launch IP Toolbench ....................................................................................................................... 3–4
Step 1: Parameterize ......................................................................................................................... 3–5
Step 2: Constraints ............................................................................................................................ 3–7
Step 3: Set Up Simulation ................................................................................................................ 3–8
Step 4: Generate ................................................................................................................................ 3–8
Simulate the Example Design ............................................................................................................ 3–11
Altera Corporation MegaCore Version 9.1 iii
Contents
Simulate with IP Functional Simulation Models ....................................................................... 3–11
Simulating in Third-Party Simulation Tools Using NativeLink ............................................. 3–12
Edit the PLL .......................................................................................................................................... 3–13
Compile the Example Design ............................................................................................................ 3–14
Program a Device ................................................................................................................................ 3–15
Implement Your Design ..................................................................................................................... 3–15
Set Up Licensing .................................................................................................................................. 3–15
Additional Information
Revision History ......................................................................................................................................... i
How to Contact Altera ............................................................................................................................... i
Typographic Conventions ....................................................................................................................... ii
iv MegaCore Version 9.1 Altera Corporation
RLDRAM II Controller MegaCore Function User Guide
1. About This MegaCore Function
Release Information
f For more information about this release, refer to the MegaCore IP Library
Device Family Support
Table 1–1 provides information about this release of the Altera®
RLDRAM II Controller MegaCore® function.
Table 1–1. Release Information
Item Description
Ver si on 9. 1
Release Date November 2009
Ordering Code IP-RLDRAMII
Product ID 00AC
Vendor ID 6AF7
Release Notes and Errata.
Altera verifies that the current version of the Quartus® II software
compiles the previous version of each MegaCore function. The MegaCore
IP Library Release Notes and Errata report any exceptions to this
verification. Altera does not verify compilation with MegaCore function
versions older than one release.
MegaCore functions provide either full or preliminary support for target
Altera device families:
■ Full support means the MegaCore function meets all functional and
timing requirements for the device family and may be used in
production designs
■ Preliminary support means the MegaCore function meets all
functional requirements, but may still be undergoing timing analysis
for the device family; it may be used in production designs with
caution.
Altera Corporation MegaCore Version 9.1 1–1
November 2009
Features
Table 1–2 shows the level of support offered by the RLDRAM II
Controller MegaCore function to each Altera device family.
Table 1–2. Device Family Support
Device Family Support
®
HardCopy
Stratix
Stratix
Other device families No support
II
®
II
II GX Full
Preliminary
Full
Features
General Description
■ Common I/O (CIO) and separate I/O (SIO) device support
■ Memory burst length 2, 4, and 8-beat support
■ Nonmultiplexed addressing
■ Datapath generation
■ Data strobe signal (DQS) and non-DQS capture modes
■ Automatic constraint generation
■ Easy-to-use IP Toolbench interface
■ IP functional simulation models for use in Altera-supported VHDL
and Verilog HDL simulators
■ Support for OpenCore Plus evaluation
The RLDRAM II controller MegaCore function handles the complex
aspects of using RLDRAM II—initializing the memory devices and
translating read and write requests from the local interface into all the
necessary RLDRAM II command signals.
The RLDRAM II controller is optimized for Altera Stratix II devices and
has preliminary support for Stratix II GX and HardCopy II devices. The
advanced features available in these devices allow you to interface
directly to RLDRAM II devices.
Figure 1–1 on page 1–3 shows a system-level diagram including the
example design that the RLDRAM II Controller MegaCore function
creates for you.
1–2 MegaCore Version 9.1 Altera Corporation
RLDRAM II Controller MegaCore Function User Guide November 2009
Figure 1–1. RLDRAM II Controller System-Level Diagram
Example Design
Local
Pass
or Fail
Example
Driver
Interface
Control Logic
(Encrypted)
About This MegaCore Function
Clock
Note to Figure 1–1:
(1) Non-DQS mode only.
System
PLL
DLL
Fedback
Clock
PLL (
1
Datapath
(Clear Text)
)
RLDRAM II Controller
RLDRAM II
Interface
RLDRAM II
IP Toolbench generates the following items:
■ A testbench, which instantiates the example design
■ A synthesizable example design which instantiates the following
modules:
● RLDRAM II controller:
• Encrypted control logic, which takes transaction requests
from the local interface and issues writes, reads, and
refreshes to the memory interface
• A clear-text datapath
● Example driver—generates write, read and refresh requests and
outputs a pass_fail signal to indicate that the tests are
passing or failing
● System phase-locked loop (PLL)—generates the RLDRAM II
controller clocks
● Delay locked loop (DLL)—instantiated in DQS mode and
generates the DQS delay control signal for the dedicated DQS
delay circuitry
Altera Corporation MegaCore Version 9.1 1–3
November 2009 RLDRAM II Controller MegaCore Function User Guide
Performance and Resource Utilization
● Optional fedback clock PLL—instantiated in non-DQS mode and
OpenCore Plus Evaluation
With Altera’s free OpenCore Plus evaluation feature, you can perform
the following actions:
■ Simulate the behavior of a megafunction (Altera MegaCore function
or AMPPSM megafunction) within your system
■ Verify the functionality of your design, as well as evaluate its size
and speed quickly and easily
■ Generate time-limited device programming files for designs that
include MegaCore functions
■ Program a device and verify your design in hardware
You only need to obtain a license for the megafunction when you are
completely satisfied with its functionality and performance, and want to
take your design to production.
f For more information on OpenCore Plus hardware evaluation using the
RLDRAM II controller, refer to “OpenCore Plus Time-Out Behavior” on
page 2–12 and AN 320: OpenCore Plus Evaluation of Megafunctions.
generates a capture clock for the datapath read capture and logic
path
Performance
Table 1–3 shows typical expected performance for the RLDRAM II
Controller MegaCore function, with the Quartus II software.
and Resource
Utilization
1–4 MegaCore Version 9.1 Altera Corporation
RLDRAM II Controller MegaCore Function User Guide November 2009
Table 1–3. Performance
Device Capture Mode
Stratix II
(EP2S60F1020C3)
Stratix II GX
(EP2SGX30CF780C3)
f
(MHz)
MAX
Non-DQS 200
DQS 300
Non-DQS 200
DQS 300
About This MegaCore Function
Stratix II and Stratix II GX devices support RLDRAM at up to 300 MHz.
Table 1–4 shows the clock frequency support for Stratix II and Stratix GX
device families, with the Quartus II software.
Table 1–4. RLDRAM II Maximum Clock Frequency Support in Stratix II &
Stratix GX Devices
Speed Grade Frequency (MHz)
–3 300
–4 250
–5 200
Table 1–5 shows typical sizes in combinational adaptive look-up tables
(ALUTs) and logic registers for the RLDRAM II controller.
Table 1–5. Typical Size Note (1)
Device Memory Width (Bits)
Stratix II and
Stratix II GX
Notes to Ta b l e 1– 5 :
(1) These sizes are a guide only and vary with different choices of parameters.
9 127 169
18 130 209
36 151 287
72 185 444
Combinational
ALUTs
Logic
Registers
Altera Corporation MegaCore Version 9.1 1–5
November 2009 RLDRAM II Controller MegaCore Function User Guide
Performance and Resource Utilization
1–6 MegaCore Version 9.1 Altera Corporation
RLDRAM II Controller MegaCore Function User Guide November 2009
2. Functional Description
Control Logic
(Encrypted)
RLDRAM II Controller
clk
write_clk
addr_cmd_clk
non_dqs_
capture_clk (
Note 3
)
reset_clk_n
reset_addr_cmd_clk_n
reset_read_clk_n[]
capture_clk[] (
Note 4)
dqs_delay_ctrl[] (
Note 4)
local_addr[]
local_bank_addr[]
local_dm[]
local_read_req
local_refresh_req
local_wdata[]
local_write_req
local_init_done
local_rdata[]
local_rdata_valid[]
local_wdata_req
Datapath
rldramii_dq[]
rldramii_q[]
rldramii_qk[]
rldramii_qvld[]
rldramii_a_0[]
rldramii_ba_0[]
rldramii_clk[]
rldramii_clk_n[]
rldramii_cs_n_0
rldramii_d[]
rldramii_dm[]
rldramii_ref_n_0
rldramii_we_n_0
Block Description
Figure 2–1. RLDRAM II Controller Block Diagram Note (1) , (2)
Notes to Figure 2–1:
(1) You can edit the rldramii_ prefix in IP Toolbench.
(2) The default signal is <signal>_0. When you specify additional address and command busses, both <signal>_0 and
(3) Non-DQS mode only.
(4) DQS mode only.
Altera Corporation MegaCore Version 9.1 2–1
November 2009
<signal>_1 are present.
Figure 2–1 shows the RLDRAM II Controller MegaCore function block
diagram.
Block Description
The RLDRAM II controller comprises the following two blocks:
■ Control logic (encrypted)
■ Datapath (clear text)
The control logic performs the following actions:
■ Generates initialization sequence using the RLDRAM II initialization
values set in IP Toolbench
■ Generates write, read, or refresh accesses when requested at the local
interface
■ Generates datapath control signals that ensure that the write data is
output on the memory rldramii_dq[] (CIO devices) or
rldramii_d[] (SIO devices) bus during the correct clock cycles
The datapath performs the following actions:
■ Interfaces to common I/O (CIO) or separate I/O (SIO) RLDRAM II
devices
■ Generates RLDRAM II clocks
■ Places RLDRAM II commands onto the memory command bus using
one of the following system PLL clocks on either the rising or falling
edge:
● System clock
● Wri t e c l ock
● Dedicated clock
■ Places write data onto the rldramii_dq[] or rldramii_d[] bus
during the correct clock cycles
■ Captures the read data using dedicated data strobe signal (DQS)
delay circuitry during DQS mode or an external capture clock in nonDQS mode
Control Logic
The control logic is responsible for controlling transactions at the memory
interface. The control logic accepts read, write, and refresh requests and
executes them immediately as RLDRAM II transactions.
In addition to reads, writes, and refreshes the control logic is also
responsible for controlling initialization of the RLDRAM II devices.
f For more information on reads, writes, refreshes, and initialization, see
“Interfaces” on page 2–16.
2–2 MegaCore Version 9.1 Altera Corporation
RLDRAM II Controller MegaCore Function User Guide November 2009
Table 2–1. Control Signals
Functional Description
Table 2–1 shows the RLDRAM II control signals generated by the control
logic for each operation.
Operation Acronym
Idle NOP High Don’t care Don’t care Don’t care Don’t care
Mode
Register
Set
Read READ Low High High Address Bank address
Write WRITE Low Low High Address Bank address
Auto
Refresh
MRS Low Low Low See your
AREF Low High Low Don’t care Bank address
rldramii
_cs_n_0
rldramii
_we_n_0
rldramii
_ref_n_0
rldramii
_a_0[20:0]
RLDRAM data
sheet
rldramii
_ba_0[2:0]
Don’t care
Datapath
Figure 2–2 on page 2–4 shows the datapath block diagram.
Altera Corporation MegaCore Version 9.1 2–3
November 2009 RLDRAM II Controller MegaCore Function User Guide
Block Description
Optional
Pipeline
Registers
Datapath
rldramii_clk[]
Address &
Command
Output
Registers
Optional
Pipeline
Registers
Write
Data
Logic
Optional
Pipeline
Registers
Read
Data
Logic
Memory
Clock
Generator
rldramii_clk_n[]
Optional
Pipeline
Registers
QVLD
Group
DM
Group
DQS Group
control_dm[]
control_doing_wr
control_wdata[]
control_wdata_valid
control_a[]
control_ba[]
control_cs_n
control_ref_n
control_we_n
control_rdata[]
capture_clk[]
non_dqs_capture_clk
dqs_delay_ctrl[]
control_qvld[]
rldramii_dq[]
rldramii_d[]
rldramii_q[]
rldramii_qk[]
rldramii_qvld[]
rldramii_dm[]
rldramii_a_0[]
rldramii_ba_0[]
rldramii_cs_n_0
rldramii_ref_n_0
rldramii_we_n_0
Figure 2–2. Datapath Block Diagram Note (1)
Note to Figure 2–2:
(1) The default signal is <signal>_0. When you specify additional address and command busses, both <signal>_0 and
2–4 MegaCore Version 9.1 Altera Corporation
RLDRAM II Controller MegaCore Function User Guide November 2009
<signal>_1 are present.
The datapath performs the following functions:
■ Interfaces to CIO or SIO RLDRAM II devices
■ Outputs write data to the RLDRAM II interface
■ Captures RLDRAM II read data and data valid (QVLD) signals with:
● In DQS mode, a delayed rldramii_qk[] generated by the
● In non-DQS mode, an external capture clock
dedicated DQS delay circuitry
Functional Description
■ Generates the RLDRAM II clocks
■ Generates addresses and commands on:
● System, dedicated, or write clock
● Rising or falling edge
■ Inserts pipeline registers in address and command and write data
path
■ Inserts pipeline registers in read data and QVLD path
The datapath provides the interface between the read and write data
busses of the datapath interface and the double-clocked, bidirectional
data bus of the memory interface. The datapath data busses are twice the
width of the memory data bus, because the memory interface transfers
data on both the rising and falling edges of the clock.
IP Toolbench generates a clear-text VHDL or Verilog HDL datapath,
which matches your custom variation. If you are designing your own
controller, Altera recommends that you use this module as your
datapath.
Figure 2–3 shows the write control signals timing relationship when
writing to the datapath.
Figure 2–3. Datapath Write Control Signal Timing
clk
control_doing_wr
control_wdata_valid
control_wdata[]
control_dm[]
01 23 45 6767
1111
Memory Clock Generator
The memory clock generator generates memory clocks. There can be up
to four memory clocks and they are generated with an altddio_out
megafunction.
Address & Command Output Registers
The address and command output registers can have the following
options:
■ System, write, or dedicated clock clocking for the output registers.
■ Rising or falling edge clocking
Altera Corporation MegaCore Version 9.1 2–5
November 2009 RLDRAM II Controller MegaCore Function User Guide
Block Description
Pipeline Registers
IP Toolbench can insert pipeline registers into the datapath to help meet
timing at higher frequencies. IP Toolbench offers the following pipeline
options:
■ Insert address and command and write data pipeline registers. The
pipeline depth is the same for the write-data path and the address
and command path. The write data and address and command
pipeline registers are clocked off the system clock.
■ Insert read data and QVLD pipeline registers. The pipeline depth is
the same for the read-data path and the QVLD path. The read data
and QVLD pipeline registers are clocked off the clock that captures
the read data—the delayed rldramii_qk[] signal in DQS mode;
the external capture clock in non-DQS mode.
DQS Group
The datapath instantiates one or more DQS groups, which generates
write data, rldramii_dq[] (CIO devices), or rldramii_d[] (SIO
devices) and captures read data rldramii_dq[] (CIO devices), or
rldramii_q[] (SIO devices). The IP Toolbench DQ per DQS (CIO
devices) or Q per DQS (SIO devices) parameter determines the DQS
group width. For example, if DQ per DQS is 9 bits, the
control_wdata[] and control_rdata[] signals are 18-bits wide. To
build larger widths, the datapath instantiates multiple DQS group
modules to increase the data-bus width in increments of DQ per DQS (or
Q per DQS) bits.
1 The datapath generates the DM output, rldramii_dm[], in the
DM group module. It generates the DM output in the same way
as the write data.
1 The datapath captures the QVLD input, rldramii_qvld[], in
the QVLD group module. The rldramii_qvld[] signal is
captured in the same way that the DQS group module captures
the read data. In DQS mode, the delayed rldramii_qk[]
captures rldramii_qvld[]; in non-DQS mode, the external
clock captures rldramii_qvld[].
Figure 2–4 on page 2–7 shows the Stratix II series and HardCopy II
devices DQS group block diagram (DQS mode, CIO devices).
2–6 MegaCore Version 9.1 Altera Corporation
RLDRAM II Controller MegaCore Function User Guide November 2009
Figure 2–4. DQS Group Block Diagram—DQS Mode, CIO Devices Note (1), (2), (3)
control_doing_wr
D
QQ
dq_oe
Functional Description
control_wdata
control_wdata_valid
control_rdata
capture_clk
2W
2W
W
Note 4
W
D
Q
EN
DQ
EN
W
W
write_clk
dq_capture_clk
DDQ
DQ
QD
QDQD
0
DQ
1
DQS
DQS Delay
Notes to Figure 2–4:
(1) This figure shows the logic for one DQ output only.
(2) All clocks are clk, unless marked otherwise.
(3) Bus width W is dependent on the DQ per DQS parameter.
(4) Invert combout of the I/O element (IOE) for the dqs pin before feeding in to inclock of the IOE for the DQ pin.
This inversion is automatic if you use an altdq megafunction for the DQ pins.
Figure 2–5 on page 2–8 shows the Stratix II series and HardCopy II
devices DQS group block diagram (DQS mode, SIO devices).
Altera Corporation MegaCore Version 9.1 2–7
November 2009 RLDRAM II Controller MegaCore Function User Guide
Block Description
Figure 2–5. DQS Group Block Diagram—DQS Mode, SIO Devices Note (1), (2), (3)
control_doing_wr
D
QQ
dq_oe
control_wdata
control_wdata_valid
control_rdata
capture_clk
2W
2W
W
Note 4
W
D
Q
EN
DQ
EN
W
W
write_clk
dq_capture_clk
DDQ
DQ
QD
QDQD
0
D
1
Q
DQS
DQS Delay
Notes to Figure 2–4:
(1) This figure shows the logic for one Q output and one D input only.
(2) All clocks are clk, unless marked otherwise.
(3) Bus width W is dependent on the Q per DQS parameter.
(4) Invert combout of the I/O element (IOE) for the dqs pin before feeding in to inclock of the IOE for the Q pin.
This inversion is automatic if you use an altdq megafunction for the Q pins.
Datapath Example
Figure 2–6 shows an example datapath. The example RLDRAM II
controller and memory configuration has the following parameters:
■ DQS mode
■ Two 18-bit CIO RLDRAM II devices. Each RLDRAM II device has
two rldramii_qk[] data strobes, each associated with 9-bits of
data
■ 36-bit RLDRAM II interface, which requires a 72-bit datapath
interface
2–8 MegaCore Version 9.1 Altera Corporation
RLDRAM II Controller MegaCore Function User Guide November 2009
Figure 2–6. Example Datapath
Datapath
Optional
Pipeline
Registers
RLDRAM II
Device 1
RLDRAM II
Device 0
Read
Data
Logic
Optional
Pipeline
Registers
QVLD
Group 1
DQS Group 3
control_rdata[35:18]
control_qvld[1]
capture_clk[1]
rldramii_dq[35:27]
rldramii_qk[3]
Optional
Pipeline
Registers
Read
Data
Logic
DQS Group 2
control_rdata[71:54]
rldramii_dq[26:18]
rldramii_qk[2]
rldramii_qvld[1]
Optional
Pipeline
Registers
Read
Data
Logic
Optional
Pipeline
Registers
QVLD
Group 0
DQS Group 1
control_rdata[17:0]
control_qvld[0]
rldramii_dq[17:9]
rldramii_qk[1]
Optional
Pipeline
Registers
Read
Data
Logic
DQS Group 0
control_rdata[53:36]
rldramii_dq[8:0]
rldramii_qk[0]
rldramii_qvld[0]
capture_clk[0]
Functional Description
Figure 2–6 shows the following points, which are applicable for all
interface configurations:
■ Each DQS rldramii_dq[] byte group is captured by the delayed
version of its associated rldramii_qk[] data strobe:
Altera Corporation MegaCore Version 9.1 2–9
November 2009 RLDRAM II Controller MegaCore Function User Guide
Block Description
● rldramii_dq[8:0] is captured by the delayed
rldramii_qk[0]
● rldramii_dq[17:9] is captured by the delayed
rldramii_qk[1]
● rldramii_dq[26:18] is captured by the delayed
rldramii_qk[2]
● rldramii_dq[35:27] is captured by the delayed
rldramii_qk[3]
■ QVLD is always captured by the delayed version of
rldramii_qk[0] for the associated RLDRAM II device. In
Figure 2–6 there are four rldramii_qk[] signals. Only
rldramii_qk[0] per RLDRAM II device captures the associated
QVLD signal:
● rldramii_qvld[0] is captured by the delayed
rldramii_qk[0]
● rldramii_qvld[1] is captured by the delayed
rldramii_qk[2]
■ After the capture registers all captured read data is clocked off the
undelayed rldramii_qk[] signal that captures the QVLD signal
for a particular RLDRAM II device:
● All RLDRAM II 0 captured data is clocked off the undelayed
rldramii_qk[0]
● All RLDRAM II 1 captured data is clocked off the undelayed
rldramii_qk[2]
■ Only one capture_clk[] per attached RLDRAM II device is
output from the datapath:
● RLDRAM II 0 capture data is associated with
capture_clk[0], which is the delayed rldramii_qk[0]
● RLDRAM II 1 capture data is associated with
capture_clk[1], which is the delayed rldramii_qk[2]
Read Data Capture Clock Association
Figure 2–7 shows the read data and data strobes at the memory interface
for the example datapath in Figure 2–6. Figure 2–8 shows how the
capture_clk[] associates with the captured read data,
control_rdata[] at the datapath interface.
2–10 MegaCore Version 9.1 Altera Corporation
RLDRAM II Controller MegaCore Function User Guide November 2009
Figure 2–7. Memory Interface
capture_clk[1]
control_rdata[]
Data associated with rldramii_qk[] rising edge
capture_clk[0]
NP
JL
FH
EG
IK
MO
AC
BD
Data associated with rldramii_qk[] falling edge
RLDRAM II
Device 1
rldramii_dq[35:27]
rldramii_qk[3]
rldramii_dq[26:18]
rldramii_qk[2]
RLDRAM II
Device 0
rldramii_dq[17:9]
rldramii_qk[1]
rldramii_dq[8:0]
rldramii_qk[0]
Data associated with rldramii_qk[] rising edge
Data associated with rldramii_qk[] falling edge
MNOP
IJKL
EFGH
ABCD
Figure 2–8. Datapath Interface
Functional Description
N P
Altera Corporation MegaCore Version 9.1 2–11
November 2009 RLDRAM II Controller MegaCore Function User Guide
Figure 2–8 shows that any read data captured on the rising edge of the
delayed rldramii_qk[] signal is located in the lower half-bit locations
of control_rdata[]. Any read data captured on the falling edge of the
delayed rldramii_qk[] signal is located in the upper half-bit locations
Device-Level Configuration
of control_rdata[], which means different bit ranges of the
control_rdata[] are associated with different capture_clk[]
signals.
1 Figure 2–8 is a specific example but the mapping and clock
association applies to any RLDRAM II controller interface and
memory configuration.
OpenCore Plus Time-Out Behavior
OpenCore Plus hardware evaluation can support the following two
modes of operation:
■ Untethered—the design runs for a limited time
■ Tethered—requires a connection between your board and the host
computer. If tethered mode is supported by all megafunctions in a
design, the device can operate for a longer time or indefinitely
All megafunctions in a device time out simultaneously when the most
restrictive evaluation time is reached. If there is more than one
megafunction in a design, a specific megafunction’s time-out behavior
may be masked by the time-out behavior of the other megafunctions.
1 For MegaCore functions, the untethered time out is 1 hour; the
tethered time out value is indefinite.
Your design stops working after the hardware evaluation time expires
and the controller issues no read commands at the memory interface.
f For more information on OpenCore Plus hardware evaluation, see
“OpenCore Plus Evaluation” on page 1–4 and AN 320: OpenCore Plus
Evaluation of Megafunctions.
Device-Level
Configuration
This section describes the following topics:
■ “PLL Configuration” on page 2–12
■ “Example Design” on page 2–14
■ “Constraints” on page 2–16
PLL Configuration
IP Toolbench creates up to two example PLLs in your project directory,
which you can parameterize to meet your exact requirements. IP
Toolbench generates the example PLLs with an input to output clock ratio
of 1:1 and a clock frequency you entered in IP Toolbench. In addition IP
Toolbench sets the correct phase outputs on the PLLs’ clocks. You can
2–12 MegaCore Version 9.1 Altera Corporation
RLDRAM II Controller MegaCore Function User Guide November 2009
Functional Description
edit the PLLs to meet your requirements with the altpll MegaWizard
TM
Plug-In. IP Toolbench overwrites your PLLs in your project directory
unless you turn off Update example design system PLL.
The external clocks are generated using standard I/O pins in double data
rate I/O (DDIO) mode (using the altddio_out megafunction). This
generation matches the way in which the write data is generated and
allows better control of the skew between the clock and the data to meet
the timing requirements of the RLDRAM II device.
The PLL has the following outputs:
■ Output c0 drives the system clock that clocks most of the controller
including the control logic and datapath.
■ Output c1 drives the write clock that lags the system clock.
■ Output c2 optionally drives the address and command clock.
■ Output c3 drives the DQS DLL clock.
The recommended configuration for implementing the RLDRAM II
controller in Stratix II series and HardCopy II devices is to use a single
enhanced PLL to produce all the required clock signals. No external clock
buffer is required as the Altera device can generate clock signals for the
RLDRAM II devices.
Figure 2–9 on page 2–14 shows the recommended PLL configuration.
Altera Corporation MegaCore Version 9.1 2–13
November 2009 RLDRAM II Controller MegaCore Function User Guide
Device-Level Configuration
Optional
Fed-Back Clock
PLL (Note 1)
FPGA Device
RLDRAM II
rldramii_clk_n
rldramii_clk
rldramii_a_0[]
rldramii_ba_0[]
rldramii_cs_n_0
rldramii_ref_n_0
rldramii_we_n_0
rldramii_qk
RLDRAM II Controller
altddio
clock_source
Enhanced PLL
clk
write_clk
non_dqs_capture_clk
addr_cmd_clk
(Note 2)
C0
C1
C2
C3
Stratix II DLL
altddio
Address &
Command
Registers
Figure 2–9. PLL Configuration
Notes to Figure 2–9:
(1) Non-DQS mode only.
(2) You can connect the addr_cmd_clk RLDRAM II controller input to clk, write_clk or to the dedicated PLL
output C2.
Example Design
IP Toolbench creates an example design that shows you how to
instantiate and connect up the RLDRAM II controller to an example
driver. The example design is a working system that can be compiled and
used for both static timing checks and board tests. It also instantiates an
example PLL that generates all the required clocks for the controller. In
DQS mode, a DLL is instantiated that controls the DQS capture delay
phase. In non-DQS mode, the example design instantiates a fedback PLL.
The output of the fedback PLL is a phase-shifted rldramii_qk[] data
strobe, which captures the read data.
2–14 MegaCore Version 9.1 Altera Corporation
RLDRAM II Controller MegaCore Function User Guide November 2009
The example driver is a self-checking test generator for the RLDRAM II
controller. It uses a state machine to write data patterns to all memory
banks. It then reads back the data and checks that the data matches. If a ny
read data fails the comparison, the pnf_per_byte output transitions
low for one cycle and the pnf_persist permanent output transitions
low and stays low.
Figure 2–10 shows a testbench and an example design.
Figure 2–10. Testbench & Example Design
Example Driver
PLLclock_source
test_complete
pnf_persist
Example Design
Testbench
RLDRAM II Controller
RLDRAM II
Model
DLL
pnf_per_byte
Table 2–2 describes the files that are associated with the example design
and the testbench.
Table 2–2. Example Design & Testbench Files
Functional Description
Filename Description
<top-level name>_tb.v or .vhd (1) Testbench for the example design.
<top-level name>.vhd or .v (1) Example design.
rldramii_pll_<device name>.vhd or .v Example PLL, which you should
rldramii_fbpll_<device name>.vhd or .vFedback PLL
<variation name>_example_driver.v
or .vhd (2)
<variation name> .v or .vhd (2) RLDRAM II controller.
Notes to Ta b l e 2– 2 :
(1) <top-level name> is the name of the Quartus II project top-level entity.
(2) <variation name> is the variation name.
The testbench instantiates an RLDRAM II model and generates a
reference clock for the PLL.
1 Altera does not provide a memory simulation model. You must
download one or use your own.
Altera Corporation MegaCore Version 9.1 2–15
November 2009 RLDRAM II Controller MegaCore Function User Guide
configure to match your frequency.
Example driver.
Interfaces
f For more details on how to run the simulation script, see “Simulate the
Example Design” on page 3–11.
Constraints
The constraints scripts set the following constraints:
■ Sets IO standards:
● 1.5 or 1.8-V HSTL voltage selection
● Address and command—HSTL Class I
● Data CIO mode—HSTL Class II
● Data SIO mode—HSTL Class I
■ Sets output capacitance
■ Places data pins as per selection in pin placement constraints floor
plan. Allows automatic placement for DQS and non-DQS modes
■ Places all DM pins
■ Sets up correct output enable groups
■ Sets rldramii_a_0, rldramii_ba_0, rldramii_cs_n_0,
rldramii_ref_n_0 and rldrainii_we_n_0 as fast output
registers (see note 1 in Table 2–5)
■ Sets rldramii_qk[] non-global signal in DQS capture mode
■ Add Hold Relationship and Setup Relationship to all I/O ports.
Interfaces
This section describes the following RLDRAM II commands:
■ Initialization
■ Wri te s
■ Reads
■ Refreshes
Initialization
The control logic initializes the RLDRAM II devices. During initialization
the mode register is set and each bank is refreshed in turn. IP Toolbench
sets the following RLDRAM II initialization features:
■ On-die termination (ODT)
■ Impedance matching resistor
■ DLL enable
■ RLDRAM II configuration
Figure 2–11 shows the initialization sequence.
2–16 MegaCore Version 9.1 Altera Corporation
RLDRAM II Controller MegaCore Function User Guide November 2009
Figure 2–11. RLDRAM II Initialization Sequence
rldramii_cl k
Command
MRS = Mode Register Set
CFG = Mode Register Configuration Data
RFx = Refresh
AC = User Command
rldramii_a[ ]
rldramii_ba[
2,048
Clock Cycles
t
MRSC
t
RC
6 x 2,048
Clock Cycles
10 Clock
Cycles
200 ms
Minimum
]
MRS MRS RF0 RF1 RF7 AC AC
0 0 CFG Ax Ax
0 1 7 Bx Bx
The mode register set (MRS) command configures the RLDRAM II
devices. In the ten-cycle MRS sequence, the first nine MRS commands are
dummy commands and all address bits are held at zero, to reset the
RLDRAM II DLL; the final MRS command configures the memory. The
RLDRAM II configuration data (CFG) is output on the
rldramii_a_0[] bus during the final MRS command. The following
memory parameters are setup during the final MRS command cycle:
Functional Description
Altera Corporation MegaCore Version 9.1 2–17
November 2009 RLDRAM II Controller MegaCore Function User Guide
■ RLDRAM II termination
■ Impedance matching resistor
■ DLL enable/disable
■ RLDRAM II configuration
Writes
When you assert local_write_req, the control logic issues the write
transaction immediately at the memory interface. The control logic then
requests write data by asserting local_wdata_req, so that the
RLDRAM II t
functionality means that the write request is decoupled from the write
data.
Figure 2–12 shows three write requests at the local and SIO RLDRAM II
interface. In this example, the memory burst length is set to eight beats.
The RLDRAM II device is setup with a t
(configuration two).
period is satisfied during write transactions. This
WL
of six-clock cycles
RC
Interfaces
clk
Local Interface
local_write_req
local_read_req
local_addr[]
local_ba[]
local_wdata_req
local_wdata[]
local_dm[]
RLDRAM II Interface
rldramii_clk
rldramii_clk_n
rldramii_cs_n
rldramii_we_n
rldramii_ref_n
rldramii_a[]
rldramii_ba[]
A B CC
A B CC
A01 A23A45 A67 B01 B23 B45B67 C01 C23 C45 C67
00
A B CB
A B CB
rldramii_d[]
rldramii_qk[]
rldramii_qvld[]
rldramii_q[]
0 1 2 3 4 5 6 7 0 1 2 3 4 5 6 7 0 1 2 3 4 5 6 77
rldramii_dm[]
11 11
00
Figure 2–12. Write Example
Figure 2–12 shows the transactions at the local interface are separated by
the correct number of clock cycles for the target RLDRAM II device
configuration. If transaction requests are supplied to the RLDRAM II
controller with the incorrect spacing the controller executes these
transactions as requested, which can result in incorrect behavior.
Figure 2–13 shows an example of a write following a read at a CIO
RLDRAM II interface. In this example, the memory burst length is set to
two beats. The RLDRAM II device is setup with a t
of six-clock cycles
RC
(configuration two).
f For more information about bus turnaround timing calculations with
2–18 MegaCore Version 9.1 Altera Corporation
RLDRAM II Controller MegaCore Function User Guide November 2009
CIO devices, refer to AN 325: Interfacing RLDRAM II with Stratix II,
Stratix & Stratix GX Devices.
Figure 2–13. Write Following a Read
clk
Local_Interface
local_write_req
local_read_req
local_addr[]
local_ba[]
local_wdata_req
local_wdata[]
local_dm[]
RLDRAM_II_Interface
rldramii_clk
rldramii_clk_n
rldramii_cs_n
rldramii_we_n
rldramii_ref_n
rldramii_a[]
rldramii_ba[]
rldramii_dm[]
rldramii_dq[]
rldramii_qk[]
rldramii_qvld[]
A BB
A BB
00
01
A BA
A BA
11 11
0000
0 1 0 11
Functional Description
Reads
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November 2009 RLDRAM II Controller MegaCore Function User Guide
When you assert local_read_req, the control logic issues the read
transaction immediately at the memory interface.
In DQS mode the read data, rldramii_dq[] (CIO devices) or
rldramii_q[] (SIO devices), and the QVLD signals,
rldramii_qvld[], are captured using the delayed rldramii_qk[]
data strobes that have been phase shifted using the dedicated DQS delay
circuitry.
In non-DQS mode the read data, rldramii_dq[] or rldramii_q[],
and the QVLD signals, rldramii_qvld[], are captured using an
external capture clock.
Interfaces
clk
Local Interface
local_read_req
local_write_req
local_addr[]
local_bank_addr[]
local_rdata_valid[]
local_rdata[]
RLDRAM II Interface
rldramii_clk
rldramii_clk_n
rldramii_cs_n
rldramii_we_n
rldramii_ref_n
rldramii_a[]
rldramii_ba[]
rldramii_dm[]
rldramii_d[]
rldramii_qk[]
rldramii_qvld[]
rldramii_q[]
A B CC
A B CC
A01 A23A45 A67 B01 B23B45 B67C01 C23 C45C67C67
A B CB
A B CB
11
0 1 2 3 4 5 6 7 0 1 2 3 4 5 6 7 0 1 2 3 4 5 6 77
Figure 2–14. Read Example
During reads, the local interface indicates that read data is valid by
asserting the local_rdata_valid[] signal. All captured read data is
clocked off the clock that captures the RLDRAM II read data. In DQS
mode, this clock is the delayed DQS signal, capture_clk[], sourced
from the dedicated DQS delay circuitry. In non-DQS mode this clock is
the external capture clock, non_dqs_capture_clk.
Figure 2–14 shows an example of a read at an SIO RLDRAM II interface.
In this example, the memory burst length is set to eight beats. The
RLDRAM II device is setup with a t
of six-clock cycles (configuration
RC
two).
Figure 2–15 shows an example of a read following a write at a CIO
RLDRAM II interface. In this example, the memory burst length is set to
eight beats. The RLDRAM II device is setup with a t
of six-clock cycles
RC
(configuration two).
f For more information about bus turnaround timing calculations with
2–20 MegaCore Version 9.1 Altera Corporation
RLDRAM II Controller MegaCore Function User Guide November 2009
CIO devices, refer to AN 325: Interfacing RLDRAM II with Stratix II,
Stratix & Stratix GX Devices.
Figure 2–15. Read Following a Write
clk
Local Interface
local_write_req
local_read_req
local_addr[]
local_bank_addr[]
local_wdata_req
local_wdata[]
local_dm[]
local_rdata_valid[]
local_rdata[]
RLDRAM II Interface
rldramii_clk
rldramii_clk_n
rldramii_cs_n
rldramii_we_n
rldramii_ref_n
rldramii_a[]
rldramii_ba[]
rldramii_dm[]
rldramii_dq[]
rldramii_qk[]
rldramii_qvld[]
A BB
A BB
01 23 45 67
00
01 23 45 6767
A BA
A BA
0 1 2 3 4 5 6 7 0 1 2 3 4 5 6 77
11 1100
Functional Description
Refreshes
You must issue refreshes to the RLDRAM II devices at periodic intervals.
When a refresh is required, assert local_refresh_req and the
RLDRAM II controller issues the refresh command immediately to the
requested bank address on local_bank_addr[] input. You must
correctly insert the refresh request and ensure that the t
timing
RC
parameter is not violated. You can issue single or ganged refreshes. For
ganged refreshes assert local_refresh_req for X clock cycles, where
X is the number of refreshes that you require.
Figure 2–16 shows a single refresh command:
Altera Corporation MegaCore Version 9.1 2–21
November 2009 RLDRAM II Controller MegaCore Function User Guide
Signals
clk
Local Interface
local_write_req
local_read_req
local_refresh_req
local_addr[]
local_bank_addr[]
local_wdata_req
local_wdata[]
local_dm[]
RLDRAM II Interface
rldramii_clk
rldramii_clk_n
rldramii_cs_n
rldramii_we_n
rldramii_ref_n
rldramii_a[]
rldramii_ba[]
rldramii_dm[]
rldramii_dq[]
rldramii_qk[]
rldramii_qvld[]
A A BB
A A BB
01 23 45 67 01 2323
00
A BA
A BA
0 1 2 3 4 5 6 77
11 1100
Figure 2–16. Single Refresh Command
Signals
Table 2–3. System Signals (Part 1 of 3)
Name
clk
Table 2–3 shows the system signals.
Width
(Bits)
1 Input System clock for the control logic and
Direction Description
datapath.
write_clk
1 Input Shifted clock that center aligns write data
to the memory.
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RLDRAM II Controller MegaCore Function User Guide November 2009
Table 2–3. System Signals (Part 2 of 3)
Functional Description
Name
addr_cmd_clk
dqs_delay_ctrl[]
non_dqs_capture_clk
reset_clk_n
reset_addr_cmd_clk_n
Width
(Bits)
1 Input Address and command output register
Direction Description
clock. The
frequency must be the same as the system
clock,
addr_cmd_clk clock
clk, and the write clock,
write_clk, frequencies.
In addition, when there is a separate
address and command clock phase, no
timing paths related to this clock should be
cut, to ensure that any paths using a
separate clock for address and command
are timing analysed.
6 Input Delay bus for DLL to shift DQS inputs. DQS
mode only.
1 Input Optional clock that captures read data and
1 Input Reset input for logic on the system clock
1 Input Reset input for logic on the address and
clocks read data logic. Non-DQS mode
only.
domain. The
asserted asynchronously but must be
deasserted synchronous to the rising edge
of the system clock.
command clock domain. The
reset_clk_n can be
reset_addr_cmd_clk_n can be
asserted asynchronously but must be
deasserted synchronous to the rising edge
of the address and command clock.
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Signals
Table 2–3. System Signals (Part 2 of 3)
Name
addr_cmd_clk
dqs_delay_ctrl[]
non_dqs_capture_clk
reset_clk_n
reset_addr_cmd_clk_n
Width
(Bits)
1 Input Address and command output register
Direction Description
clock. The
frequency must be the same as the system
clock,
addr_cmd_clk clock
clk, and the write clock,
write_clk, frequencies.
In addition, when there is a separate
address and command clock phase, no
timing paths related to this clock should be
cut, to ensure that any paths using a
separate clock for address and command
are timing analysed.
6 Input Delay bus for DLL to shift DQS inputs. DQS
mode only.
1 Input Optional clock that captures read data and
1 Input Reset input for logic on the system clock
1 Input Reset input for logic on the address and
clocks read data logic. Non-DQS mode
only.
domain. The
asserted asynchronously but must be
deasserted synchronous to the rising edge
of the system clock.
command clock domain. The
reset_clk_n can be
reset_addr_cmd_clk_n can be
asserted asynchronously but must be
deasserted synchronous to the rising edge
of the address and command clock.
2–24 MegaCore Version 9.1 Altera Corporation
RLDRAM II Controller MegaCore Function User Guide November 2009
Table 2–3. System Signals (Part 3 of 3)
Functional Description
Name
reset_read_clk_n[]
capture_clk[]
DQS mode:
the number of
RLDRAM II devices
attached to the memory
interface
Non-DQS mode:
1
The number of
RLDRAM II devices
attached to memory
interface
Width
(Bits)
Table 2–4 shows the local interface signals.
Table 2–4. Local Interface Signals (Part 1 of 2)
Name
local_addr[]
local_bank_addr[]
local_dm[]
local_read_req
local_refresh_req
Width
(Bits)
Device dependant Input RLDRAM II address. IP Toolbench refers to the
3 – RLDRAM II bank address.
The number of
RLDRAM II devices
attached to the
memory interface ×
2
1 Input Read request signal.
1 Input User controlled refresh request. This allows
Direction Description
Input Reset input for logic on the capture clock
domain. In DQS mode, the capture clock
domain is
mode, it is
DQS mode, each
capture_clk[]; in non-DQS
non_dqs_capture_clk. In
reset_read_clk_n[] is associated
with the corresponding
clock domain. The
capture_clk[]
reset_read_clk_n[] can be asserted
asynchronously but must be deasserted
synchronous to the rising edge of the
capture clock.
Output Undelayed DQS clock used by capture
circuitry to capture RLDRAM II read data.
There is one
attached RLDRAM II device. DQS mode
only.
capture_clk[] per
Direction Description
memory.dat file and selects the address width
appropriate to the device.
Input Optional local data mask (DM). Twice the width of
the memory
high, all writes are masked.
complete control over when refreshes are issued
to the memory. The refresh is issued to the bank
address on
rldramii_dm[] bus. When all
local_bank_addr[].
Altera Corporation MegaCore Version 9.1 2–25
November 2009 RLDRAM II Controller MegaCore Function User Guide
Signals
Table 2–4. Local Interface Signals (Part 2 of 2)
Name
local_wdata[]
local_write_req
local_init_done
local_rdata[]
local_rdata_valid
[]
local_wdata_req
Width
(Bits)
Data-bus width × 2 Input Write data bus. The local interface must request
Direction Description
local_wdata[] over multiple clock cycles to
construct the write data for any requested write
bursts. If the memory burst length is set to two
beats, the write data is requested in a single
clock cycle at the local interface.
1 Input Write request signal.
1 Output Memory initialization complete signal which is
asserted when the controller has completed its
initialization of the memory. Reads and writes
should not be requested until
local_init_done is asserted.
Data-bus width × 2 Output Read data bus. The controller returns
local_rdata[] over multiple clock cycles for
any requested read transactions. If the memory
burst length is set to two beats, the read data is
returned in a single clock cycle at the local
interface.
The number of
RLDRAM II devices
attached to memory
interface
1 Output Write data request signal. When the local
Output Read data valid signal, which indicates that valid
data is present on the read data bus. The
local_rdata_valid[] signal is aligned with
the local read data,
only one
attached RLDRAM II device.
interface asserts
write data for the burst should be available in
contiguous clock cycles.
local_rdata_valid[] per
local_rdata[]. There is
local_wdata_req, all the
Table 2–5 shows the memory interface signals.
Table 2–5. Memory Interface Signals (Part 1 of 2)
Name
rldramii_dq[]
rldramii_qk[]
rldramii_q[]
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RLDRAM II Controller MegaCore Function User Guide November 2009
Width
(Bits)
Data-bus width Bidirectional Memory data bus. CIO devices only.
1 to 9 Bidirectional In DQS mode, the memory data strobe signal
Data-bus width Input Memory read data bus. SIO devices only.
Direction Description
that captures read data into the Altera device; in
non-DQS mode, the RLDRAM II controller does
not use
rldramii_qk[].
Table 2–5. Memory Interface Signals (Part 2 of 2)
Functional Description
Name
rldramii_qvld[]
rldramii_a_0[]
rldramii_a_1[]
(1)
rldramii_ba_0[]
rldramii_ba_1[]
(1)
rldramii_clk[],
rldramii_clk_n[]
rldramii_cs_n_0
rldramii_cs_n_1
(1)
rldramii_d[]
rldramii_dm[]
rldramii_ref_n_0
rldramii_ref_n_1
(1)
rldramii_we_n_0
rldramii_we_n_1
(1)
Width
(Bits)
The number of
RLDRAM II devices
attached to memory
interface
local_addr[]
3 Output Memory bank address signals.
1 to 3 (wtih
dedicated PLL
clocks) or 1 to 8
otherwise
1 Output Memory chip select signal.
Data-bus width Output Memory write data bus. SIO devices only.
The number of
RLDRAM II devices
attached to memory
interface
1 Output Memory refresh request signal.
1 Output Memory write enable signal.
Direction Description
Input Read data valid flag.
Output Memory address signals.
Output Memory command output clock.
Output Memory DM (optional).
Note to Ta b le 2 – 5:
(1) The default signal is <signal>_0. When you specify additional address and command busses, both <signal>_0 and
<signal>_1 are present.
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November 2009 RLDRAM II Controller MegaCore Function User Guide
Parameters
Table 2–6 shows the datapath interface signals.
Table 2–6. Datapath Interface Signals
Name
Width
(Bits)
control_a[] local_addr[]
control_ba[]
control_cs_n
control_dm[]
control_doing_wr
control_ref_n
control_wdata[]
control_wdata_
3
1 Input Chip select signal.
The number of
RLDRAM II devices
attached to the
memory interface ×
2
1 Input
1 Input Refresh signal.
Data-bus width × 2 Input The write data bus, which has valid data in the same
1 Input Enables the write data bus and DM enable registers
valid
control_we_n
control_qvld[]
control_rdata[]
1 Input Write enable signal.
The number of
RLDRAM II devices
attached to the
memory interface
Data-bus width × 2 Output The captured read data (same as
Direction Description
Input Address bits.
Input Bank address bits.
Input The DM bus, which has valid data in the same clock
cycles that
control_wdata_valid is asserted.
Control_doing_wr is asserted when the
controller is writing to the RLDRAM II devices and
controls the output enables on
rldramii_dq[] or
rldramii_d[].
clock cycles that
asserted.
so that they are only updated when valid data and
enables are available.
Output The read data valid flag.There is only one QVLD flag
per RLDRAM II device. The
signal is aligned with the valid
and is asserted during this period. The
control_wdata_valid is
control_qvld[]
control_rdata[]
control_qvld[] signal has the same
functionality as
local_rdata_valid[].
local_rdata[]).
Parameters
2–28 MegaCore Version 9.1 Altera Corporation
RLDRAM II Controller MegaCore Function User Guide November 2009
The parameters can only be set in IP Toolbench (see “Step 1:
Parameterize” on page 3–5).
Functional Description
Memory
Table 2–7 shows the memory type parameters.
Table 2–7. Memory Type Parameters
Parameter Range Units Description
RLDRAM II device Part number – A par t number for a particular memory device. Choosing
Clock speed 100 to 400 MHz The memory controller clock frequency.The constraints
Interface voltage 1.5 or 1.8 V The RLDRAM II interface voltage.
DQ per DQS 8, 9, 16, 18 Bits Number of DQ bits per DQS input pin. CIO devices only.
Q per DQS 8, 9, 16, 18 Bits Number of Q bits per DQS input pin. SIO devices only.
Data-bus width Device
dependent
Bits The width of the memory interface.
an entry sets many of the parameters in the wizard to the
correct value for the specified part. You can add your own
devices to this list by editing the memory_types.dat file in
the \constraints directory.
script and the datapath use this clock speed. It must be set
to the value that you intend to use. The first time you use
IP Toolbench or if you turn on Update example design
system PLL, it uses this value for the IP Toolbenchgenerated PLL’s input and output clocks.
For more information about supported interface data
widths, refer to AN 325: Interfacing RLDRAM II with Stratix
II, Stratix & Stratix GX Devices.
Table 2–8 shows the memory initialization options.
Table 2–8. Memory Initialization Options
Parameter Range Description
Memory configuration 1, 2, or 3. Refer to your RLDRAM II data sheet.
Burst length 2, 4, or 8 Number of beats in the burst at the memory interface. The number of
Manually enter
initialization clock
cycles
Number of
initialization clock
cycles
Enable on-die
termination
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November 2009 RLDRAM II Controller MegaCore Function User Guide
On or off The wizard takes the number of initialization clock cycles from the
16 to 80,000
On or off Refer to your RLDRAM II data sheet.
beats at the local interface is half this value.
memory.dat file in the constraints directory. The number is
calculated from the initialization entry time and the clock speed. You
can manually enter a number for the initialization clock cycles if you
turn on Manually enter initialization clock cycles.
Parameters
Table 2–8. Memory Initialization Options
Parameter Range Description
Enable external
impedance matching
Enable memory
device DLL
On or off Refer to your RLDRAM II data sheet.
On or off Refer to your RLDRAM II data sheet.
Table 2–9 shows the memory interface parameters.
Table 2–9. Memory Interface Parameters
Parameter Range Units Description
Number of address
and command busses
from FPGA to
memory for multiple
devices
Generate DM pins On or off – Adds DM pins and logic to the design.
Use dedicated PLL
outputs
Number of clock pairs
from FPGA to
memory
1 or 2 – Depends on the number of devices. If you connect only
one device there can be only one address and command
bus. (1)
On or off – Turn on to use dedicated PLL outputs to generate the
1 to 8 – The number of RLDRAM II clock output pairs generated in
clocks, which is recommended for HardCopy II devices.
When turned off
outputs.
the datapath. When you turn on Use dedicated clock
outputs, only values of 1 to 3 are valid.
altddio outputs generate the clock
Note to Ta b le 2 – 9:
(1) The default signal is <signal>_0. When you specify additional address and command busses, both <signal>_0 and
<signal>_1 are present.
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Timing
Table 2–10 shows the pipeline options.
Table 2–10. Pipeline Options
Parameter Range Description
Number of address
and command and
write data pipeline
registers
Number of read data
pipeline registers
Table 2–11. Clocking Modes
Parameter Range Description
Address and
command clock
0, 1, 2 or 3 When you choose 1, 2, or 3 the wizard inserts 1, 2, or 3 pipeline
0, 1, 2 or 3 When you choose 1, 2, or 3 the wizard inserts 1, 2, or 3 pipeline
registers between the memory controller and the command and
address output registers and the write data output registers. These
registers may help to achieve the required performance at higher
frequencies.
registers between the read capture registers and the memory
controller. These registers may help to achieve the required
performance at higher frequencies.
Table 2–11 shows the clocking modes.
System, write,
or dedicated
The clock for the address and command output registers. For
system_clk choose System; for write_clk, choose Write, and
for a separate clock, choose Dedicated.
Functional Description
If you choose Dedicated for the clock, ensure the clock phase allows
the Quartus II software to meet the setup time on the address and
command output registers.
Address and
command clock edge
Dedicated address
and command clock
PLL phase offset
Enable DQS mode On or off Turn on for DQS mode; otherwise the controller is in non-DQS mode
Use migratable byte
groups
Fedback PLL phase
offset
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November 2009 RLDRAM II Controller MegaCore Function User Guide
Falling or rising The clock edge on which the addresses and commands are output.
± 180 Sets the dedicated address and command clock PLL phase for better
timing.
(Stratix II and Stratix II GX devices only). HardCopy II devices allow
DQS mode only.
On or off When turned on, you can migrate the design to a migration device.
When turned off the wizard allows much greater flexibility in the
placement of byte groups. You can only turn on this option when
Enable DQS mode is turned off.
± 180 Sets the fedback clock PLL phase for read capture (non-DQS mode
only).
Parameters
Table 2–12 shows the pin loading parameters.
Table 2–12. Pin Loading Parameters
Parameter Range (pF) Description
Pin loading on FPGA
DQ/DQS pins
Pin loading on FPGA
address and
command pins
Pin loading on FPGA
clock pins
0 to 100 Enter the pin loading to match your board and memory devices.
0 to 100 Enter the pin loading to match your board and memory devices.
0 to 100 Enter the pin loading to match your board and memory devices.
Project Settings
Table 2–13 shows the example design settings.
Table 2–13. Example Design Settings
Parameter Description
Automatically apply
RLDRAM II controllerspecific constraints to the
Quartus II project
Update the example
design file that
instantiates the RLDRAM
II controller variation
When this option is turned on, the next time you compile, the Quartus II software
automatically runs the add constraints script. Turn off this option if you do not want
the script to run automatically.
When this option is turned on, IP Toolbench parses and updates the example design
file. It only updates sections that are between the following markers:
<<START MEGAWIZARD INSERT <tagname>
<<END MEGAWIZARD INSERT <tagname>
If you edit the example design file, ensure that your changes are outside of the
markers or remove the markers. Once you remove the markers, you must keep the
file updated, because IP Toolbench can no longer update the file.
Update example design
system PLL
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When this option is turned on, IP Toolbench automatically overwrites the PLL.Turn off
this option, if you do not want the wizard to overwrite the PLL.
Functional Description
Table 2–14 shows the variation path parameters.
Table 2–14. Variation Path Parameters
Parameter Description
Enable hierarchy control The constraints script analyzes your design, to automatically extract the hierarchy to
your variation. To prevent the constraints script analyzing your design, turn on
Enable Hierarchy Control, and enter the correct hierarchy path to your datapath.
Hierarchy path to
RLDRAM II controller
datapath
The hierarchy path is the path to your RLDRAM II controller datapath, minus the toplevel name. The hierarchy entered in the wizard must match your design, because
the constraints scripts rely on this path for correct operation.
Table 2–15 shows the device pin prefixes parameter.
Table 2–15. Device Pin Prefixes
Parameter Description
Prefix all RLDRAM II pins
on the device with
This string prefixes the pin names for the FPGA pins that are connected to the
RLDRAM II controller.
MegaCore Verification
MegaCore verification involves simulation testing and hardware testing.
Simulation Environment
Altera has carried out extensive functional tests using industry-standard
models to ensure the functionality of the RLDRAM II controller. In
addition, Altera has carried out a wide variety of gate-level tests on the
RLDRAM II controller to verify the post-compilation functionality of the
controller.
Hardware Testing
Table 2–16 shows the Altera development board on which Altera
hardware tested the RLDRAM II controller.
Table 2–16. Altera Development Boards
Development Board Altera Device Memory Device
Stratix II Memory Demonstration Board 1 EP2S60F1020C3 Micron 18-bit CIO and SIO RLDRAM II
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November 2009 RLDRAM II Controller MegaCore Function User Guide
devices
MegaCore Verification
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RLDRAM II Controller MegaCore Function User Guide November 2009
3. Getting Started
Design Flow
To evaluate the RLDRAM II Controller MegaCore function using the
OpenCore Plus feature, include these steps in your design flow:
1. Obtain and install the RLDRAM II Controller MegaCore Function.
The RLDRAM II Controller is part of the MegaCore IP Library, which is
distributed with the Quartus II software and downloadable from the
Altera website, www.altera.com.
f For system requirements and installation instructions, refer to Altera
Software Installation and Licensing.
Figure 3–1 shows the directory structure after you install the RLDRAM II
Controller, where <path> is the installation directory. The default
installation directory on Windows is c:\altera\<version>; on Linux it is
/opt/altera<version>.
Figure 3–1. RLDRAM II Controller Directory Structure
<path>
Installation directory.
ip
Contains the Altera MegaCore IP Library and third-party IP cores.
altera
Contains the Altera MegaCore IP Library.
common
Contains shared components.
rldram_ii_controller
Contains the RLDRAM II Controller MegaCore function files and documentation.
constraints
Contains scripts that generate an instance-specific Tcl script for each instance of
the RLDRAM II Controller in various Altera devices.
dat
Contains a data file for each Altera device combination that is used by the
Tcl script to generate the instance-specific Tcl script.
doc
Contains the documentation for the RLDRAM II Controller MegaCore function.
lib
Contains encrypted lower-level design files and other support files.
2. Create a custom variation of the RLDRAM II Controller MegaCore
function using IP Toolbench.
Altera Corporation MegaCore Version 9.1 3–1
November 2009
RLDRAM II Controller Walkthrough
3. Implement the rest of your design using the design entry method of
4. Use the IP Toolbench-generated IP functional simulation model to
f For more information on IP functional simulation models, refer to the
Simulating Altera IP in Third-Party Simulation Tools chapter in volume 3 of
the Quartus II Handbook.
5. Edit the PLL.
6. Use the Quartus II software to add constraints to the example
7. Perform gate-level timing simulation, or if you have a suitable
1 IP Toolbench is a toolbar from which you quickly and easily
view documentation, specify parameters, and generate all
of the files necessary for integrating the parameterized
MegaCore function into your design.
your choice.
verify the operation of your design.
design and compile the example design.
development board, you can generate an OpenCore Plus
time-limited programming file, which you can use to verify the
operation of the example design in hardware.
8. Either obtain a license for the RLDRAM II controller MegaCore
function or replace the encrypted RLDRAM II controller control
logic with your own logic and use the clear-text datapath.
1 If you obtain a license for the RLDRAM II controller, you
must set up licensing.
9. Generate a programming file for the Altera device(s) on your board.
10. Program the Altera device(s) with the completed design.
RLDRAM II
Controller
Walkthrough
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RLDRAM II Controller MegaCore Function User Guide November 2009
This walkthrough explains how to create a RLDRAM II controller using
the Altera RLDRAM II controller IP Toolbench and the Quartus II
software on a PC. When you are finished generating a custom variation
of the RLDRAM II controller MegaCore function, you can incorporate it
into your overall project.
This walkthrough requires the following steps:
■ “Create a New Quartus II Project” on page 3–3
■ “Launch IP Toolbench” on page 3–4
Getting Started
■ “Step 1: Parameterize” on page 3–5
■ “Step 2: Constraints” on page 3–7
■ “Step 3: Set Up Simulation” on page 3–8
■ “Step 4: Generate” on page 3–8
Create a New Quartus II Project
You need to create a new Quartus II project with the New Project Wizard,
which specifies the working directory for the project, assigns the project
name, and designates the name of the top-level design entity. To create a
new project follow these steps:
1. Choose Programs > Altera > Quartus II <version> (Windows Start
menu) to run the Quartus II software. Alternatively, you can use the
Quartus II Web Edition software.
2. Choose New Project Wizard (File menu).
3. Click Next in the New Project Wizard Introduction page (the
introduction page does not display if you turned it off previously).
4. In the New Project Wizard: Directory, Name, Top-Level Entity
page, enter the following information:
a. Specify the working directory for your project. For example,
this walkthrough uses the c:\altera\projects\rldram_project
directory.
b. Specify the name of the project. This walkthrough uses project
for the project name.
1 The Quartus II software automatically specifies a top-level
design entity that has the same name as the project. Do not
change it.
5. Click Next to close this page and display the New Project Wizard:
Add Files page.
1 When you specify a directory that does not already exist, a
message asks if the specified directory should be created.
Click Yes to create the directory.
6. If you installed the MegaCore IP Library in a different directory
from where you installed the Quartus II software, you must add the
user libraries:
a. Click User Libraries.
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November 2009 RLDRAM II Controller MegaCore Function User Guide
RLDRAM II Controller Walkthrough
7. Click Next to close this page and display the New Project Wizard:
8. On the New Project Wizard: Family & Device Settings page,
9. The remaining pages in the New Project Wizard are optional. Click
You have finished creating your new Quartus II project.
Launch IP Toolbench
To launch IP Toolbench in the Quartus II software, follow these steps:
1. Start the MegaWizard
b. Type <path>\ip into the Library name box, where <path> is the
directory in which you installed the RLDRAM II controller.
c. Click Add to add the path to the Quartus II project.
d. Click OK to save the library path in the project.
Family & Device Settings page.
choose the target device family in the Family list.
Finish to complete the Quartus II project.
®
Plug-In Manager by choosing MegaWizard
Plug-In Manager (Tools menu). The MegaWizard Plug-In Manager
dialog box displays.
1 Refer to Quartus II Help for more information on how to
use the MegaWizard Plug-In Manager.
2. Specify that you want to create a new custom megafunction
variation and click Next.
3. Expand the Interfaces > Memory Controllers directory, then click
RLDRAM II Controller v9.1.
4. Select the output file type for your design; the wizard supports
VHDL and Verilog HDL.
5. The MegaWizard Plug-In Manager shows the project path that you
specified in the New Project Wizard. Append a variation name for
the MegaCore function output files <project path>\<variation name>.
1 The <variation name> must be a different name from the
project name and the top-level design entity name.
6. Click Next to launch IP Toolbench.
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RLDRAM II Controller MegaCore Function User Guide November 2009
Getting Started
Step 1: Parameterize
To parameterize your MegaCore function, follow these steps:
f For more information on parameters, refer to “Parameters” on
page 2–28.
1. Click Step 1: Parameterize in IP Toolbench .
2. Choose the memory type.
a. Choose the memory device.
1 You can add your own memory devices to this list by
editing the memory_types.dat file in the \constraints
directory.
b. Enter the clock speed.
c. Choose the interface voltage.
d. Choose the data bus width.
e. Choose the DQ per DQS (CIO devices), or the Q per DQS (SIO
devices).
3. Choose the memory initialization options.
4. Choose your memory interface parameters.
5. Click the Timing tab.
f For more information on timing parameters, refer to “Timing” on
page 2–31.
6. Enter the datapath pipeline options.
7. Choose the clocking modes.
8. Turn on the appropriate capture mode—DQS or non-DQS capture
mode. If you turn off Enable DQS mode (non-DQS capture mode),
you can turn on Use migratable bytegroups.
9. Click the Project Settings tab.
f For more information on project settings, refer to “Project Settings” on
page 2–32.
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November 2009 RLDRAM II Controller MegaCore Function User Guide
RLDRAM II Controller Walkthrough
10. Altera recommends that you turn on Automatically apply
1 You must turn on this option, the first time you run IP
11. En sure Update the example design file that instantiates the
1 You must turn on this option, the first time you run IP
12. Turn off Update example design system PLL, if you have edited the
1 You must turn on this option, the first time you run IP
13. The constraints script automatically detects the hierarchy of your
RLDRAM II controller-specific constraints to the Quartus II
project so that the Quartus II software automatically applies the
constraints script when you compile the example design.
Toolbench.
RLDRAM II controller variation is turned on, for IP Toolbench to
automatically update the example design file.
Toolbench.
PLL and you do not want the wizard to regenerate the PLL when
you regenerate the variation.
Toolbench.
design. The constraints script analyzes and elaborates your design
to automatically extract the hierarchy to your variation. To prevent
the constraints script analyzing and elaborating your design, turn
on Enable Hierarchy Control, and enter the correct hierarchy path
to your datapath. Figure 3–2 shows the following example
hierarchy:
my_system:my_system_inst|my_sub_system:my_sub_system_inst|
my_rldramii:my_rldramii_inst|datapath:datapath_inst|
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Figure 3–2. System Naming
RLDRAM II
Datapath
Other Logic
PLL
RLDRAM II
Interface
example_top
Example Top-Level Design
my_rldram
RLDRAM II Controller
my_system
System
my_sub_system
Subystem
Getting Started
14. IP Toolbench uses a prefix (for example, rldramii_) for the names of
all memory interface pins. Enter a prefix for all memory interface
pins associated with this custom variation.
15. Enter the pin loading for the FPGA pins.
1 You must enter suitable values for the pin loading, because
the values affect timing.
16. Click Finish.
Step 2: Constraints
To choose the constraints for your device, follow these steps:
1. Click Step 2: Constraints in IP Toolbench.
2. Choose the positions on the device for each of the RLDRAM II byte
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November 2009 RLDRAM II Controller MegaCore Function User Guide
groups. To place a byte group, select the byte group in the dropdown box at your chosen position.
1 The floorplan matches the orientation of the Quartus II
floorplanner. The layout represents the die as viewed from
above. A byte group consists of data (DQ) pins for CIO
devices; or data (Q) pins for SIO devices, and a data strobe
signal (DQS) pin. The number of data pins per byte group
matches your choice of DQ (or Q) per DQS.
RLDRAM II Controller Walkthrough
Step 3: Set Up Simulation
An IP functional simulation model is a cycle-accurate VHDL or Verilog
HDL model produced by the Quartus II software. The model allows for
fast functional simulation of IP using industry-standard VHDL and
Verilog HDL simulators.
c You may only use these simulation model output files for
To generate an IP functional simulation model for your MegaCore
function, follow these steps:
1. Click Step 3: Set Up Simulation in IP Toolbench.
2. Turn on Generate Simulation Model.
3. Choose the language in the Language list.
4. Some third-party synthesis tools can use a netlist that contains only
simulation purposes and expressly not for synthesis or any
other purposes. Using these models for synthesis will create a
nonfunctional design.
the structure of the MegaCore function, but not detailed logic, to
optimize performance of the design that contains the MegaCore
function. If your synthesis tool supports this feature, turn on
Generate netlist.
5. Click OK.
Step 4: Generate
To generate your MegaCore function, click Step 4: Generate in IP
Toolbench.
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Getting Started
Table 3–1 describes the generated files and other files that may be in your
project directory. The names and types of files specified in the IP
Toolbench report vary based on whether you created your design with
VHDL or Verilog HDL
Table 3–1. Generated Files (Part 1 of 2) Note (1), (2), (3)
Filename Description
<variation name>.vhd, or .v A MegaCore function variation file, which defines a
VHDL or Verilog HDL description of the custom
MegaCore function. Instantiate the entity defined by this
file inside of your design. Include this file when compiling
your design in the Quartus II software.
<variation name>.cmp A VHDL component declaration file for the MegaCore
function variation. Add the contents of this file to any
VHDL architecture that instantiates the MegaCore
function.
<variation name>.bsf Quartus II symbol file for the MegaCore function
<variation name>.sdc A Synopsys Design Constraints (SDC) file. Use this SDC
altera_vhdl_support.vhd A VHDL package that contains functions for the
<variation name>_example_driver.vhd or .v Example driver.
<top-level name>.vhd or .v Example design file.
add_constraints_for_<variation name>.tcl Add constraints script.
rldramii_pll_<device name>.vhd or .v System PLL.
rldramii_fbpll_<device name>.vhd or .v Fedback PLL.
<variation
name>_auk_rldramii_addr_cmd_reg.vhd or .v
<variation name>_auk_rldramii_clk_gen.vhd or .v Memory clock generator.
<variation
name>_auk_rldramii_controller_ipfs_wrapper.vh
d or .v
<variation
name>_auk_rldramii_controller_ipfs_wrapper.vh
o
or .vo
<variation name>_auk_rldramii_datapath.vhd or .v Datapath.
variation. You can use this file in the Quartus II block
diagram editor.
file with the DDR timing wizard (DTW)-generated SDC
file when using TimeQuest. You must copy the contents
of this file into the DTW-generated SDC file, so the
example design has the correct timing constraints when
using TimeQuest.
generated entities. This file may be shared between
MegaCore functions.
Address and command output registers.
A file that instantiates the controller.
VHDL or Verilog HDL IP functional simulation model.
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RLDRAM II Controller Walkthrough
Table 3–1. Generated Files (Part 2 of 2) Note (1), (2), (3)
Filename Description
<variation name>_auk_rldramii_dm_group.vhd or .vData mask (DM) group.
<variation name>_auk_rldramii_dqs_group.vhd or .vDQS group.
<variation
name>_auk_rldramii_pipeline_addr_cmd.vhd or
.v
<variation name>_auk_rldramii_pipeline_qvld.vhd
or .v
<variation
name>_auk_rldramii_pipeline_rdata.vhd or .v
<variation
name>_auk_rldramii_pipeline_wdata.vhd or .v
<variation name>_auk_rldramii_qvld_group.vhd
or .v
<variation name>.html MegaCore function report file.
<variation name>.qip Contains Quartus II project information for your
Notes to Ta b l e 3 – 1 :
(1) <top-level name> is the name of the Quartus II project top-level entity.
(2) <variation name> is the name you assign.
(3) <device name> is the device family name.
Address and command pipeline registers.
Valid data flag (QVLD) pipeline registers.
Read data pipeline registers.
Write data pipeline registers.
QVLD group.
MegaCore function variations.
1. After you review the generation report, click Exit to close IP
To ol be n ch .
1 The Quartus II IP File (.qip) is a file generated by the
MegaWizard interface, and contains information about the
generated IP core. You are prompted to add this .qip file to the
current Quartus II project at the time of file generation. In most
cases, the .qip file contains all of the necessary assignments and
information required to process the core or system in the
Quartus II compiler. Generally, a single .qip file is generated for
each MegaCore function or system in the Quartus II compiler.
Now, simulate the example design (refer to “Simulate the Example
Design” on page 3–11), edit the PLL(s), and compile (refer to “Compile
the Example Design” on page 3–14).
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Getting Started
Simulate the Example Design
f For more information on the testbench, refer to “Example Design” on
This section describes the following simulation techniques:
■ Simulate with IP Functional Simulation Models
■ Simulating in Third-Party Simulation Tools Using NativeLink
Simulate with IP Functional Simulation Models
You can simulate the example design using the IP Toolbench-generated IP
functional simulation models. IP Toolbench generates a VHDL or Verilog
HDL testbench for your example design, which is in the testbench
directory in your project directory.
page 2–14.
You can use the IP functional simulation model with any
Altera-supported VHDL or Verilog HDL simulator. To simulate the
example design with the ModelSim
1. Obtain a memory model that matches your chosen parameters and
save it to the <directory name>\testbench directory. For example,
you can download a RLDRAM II model from the Micron web site at
www.micron.com.
1 Before running the simulation you may also need to edit the
testbench to match the chosen RLDRAM II model.
®
simulator, follow these steps:
2. Start the ModelSim-Altera simulator.
3. Change your working directory to your IP Toolbench-generated file
directory <directory name>\testbench\modelsim.
4. To simulate with an IP functional simulation model simulation, type
the following command:
source <variation name>_vsim.tcl
r
1 Before running the simulation, you may have to edit the
set memory model parameter in the <variation
name>_vsim.tcl file to match the selected RLDRAM II
model.
5. For a gate-level timing simulation (VHDL or Verilog HDL
ModelSim output from the Quartus II software), type the following
commands:
set use_gate_model 1
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November 2009 RLDRAM II Controller MegaCore Function User Guide
r
Simulate the Example Design
f For more information on NativeLink, refer to the Simulating Altera IP in
source <variation name>_vsim.tclr
Simulating in Third-Party Simulation Tools Using NativeLink
You can perform a simulation in a third-party simulation tool from within
the Quartus II software, using NativeLink.
Third-Party Simulation Tools chapter in volume 3 of the Quartus II
Handbook.
To set up simulation in the Quartus II software using NativeLink, follow
these steps:
1. Create a custom variation with an IP functional simulation model.
2. Obtain and copy an RLDRAM II model to a suitable location, for
example, the testbench directory.
1 Before running the simulation you may also need to edit the
testbench to match the chosen RLDRAM II model.
3. Check that the absolute path to your third-party simulator
executable is set. On the Tools menu click Options and select EDA
Tools Options.
4. On the Processing menu, point to Start and click Start Analysis &
Elaboration.
5. On the Assignments menu click Settings, expand EDA Tool
Settings and select Simulation. Select a simulator under Too l N ame
and in NativeLink Settings, select Compile Test Bench and click
Test Benches.
6. Click New.
7. Enter a name for the Test bench name.
8. Enter the name of the automatically generated testbench, <project
name>_tb, in Test bench entity.
9. Enter the name of the top-level instance in Instance.
10. Change Run for to 80 s.
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RLDRAM II Controller MegaCore Function User Guide November 2009
Getting Started
11. Add the testbench files. In the File name field browse to the location
of the RLDRAM II model and the testbench, <project name>_tb, click
OK and click Add.
12. Click OK.
13. Click OK.
14. On the Tools menu point to EDA Simulation Tool and click Run
EDA RTL Simulation.
Edit the PLL
The IP Toolbench-generated example design includes a PLL, which has
an input to output clock ratio of 1:1 and a clock frequency that you
entered in IP Toolbench. In addition, IP Toolbench correctly sets all the
phase offsets of all the relevant clock outputs for your design. You can
edit the PLL input clock to make it conform to your system requirements.
If you re-run IP Toolbench and wish to save your PLL edits, turn off
Update example design system PLL.
1 If you turn off Enable DQS mode, IP Toolbench generates a
second PLL—the fedback PLL. You need not edit the fedback
PLL.
f For more information on the PLL, refer to “PLL Configuration” on
page 2–12.
To edit the example PLL, follow these steps:
1. Choose MegaWizard Plug-In Manager (Tools menu).
2. Select Edit an existing custom megafunction variation and click
Next.
3. In your Quartus II project directory, for VHDL choose
rldramii_pll_<device name>.vhd; for Verilog HDL choose
rldramii_pll_<device name>.v.
4. Click Next.
5. Edit the PLL parameters in the altpll MegaWizard Plug-In.
f For more information on the altpll megafunction, refer to the
Quartus II Help or click Documentation in the ALTPLL MegaWizard
Plug-In.
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November 2009 RLDRAM II Controller MegaCore Function User Guide
Compile the Example Design
Compile the
Example Design
Before the Quartus II software compiles the example design it runs the IP
Toolbench-generated Tcl constraints script,
auto_add_rldramii_constraints.tcl, which calls the
add_constraints_for_<variation name>.tcl script for each variation in your
design. The add_constraints_for_<variation name>.tcl script checks for
any previously added constraints, removes them, and then adds
constraints for that variation.
The constraints script analyzes and elaborates your design, to
automatically extract the hierarchy to your variation. To prevent the
constraints script analyzing and elaborating your design, turn on Enable
Hierarchy Control in the wizard, and enter the correct hierarchy path to
your datapath (refer to step 13 on page 3–6).
When the constraints script runs, it creates another script,
remove_constraints_for_<variation name>.tcl, which you can use to
remove the constraints from your design.
To compile the example instance, follow these steps:
1. Choose Start Compilation (Processing menu), which runs the add
constraints scripts, compiles the example design, and performs
timing analysis.
2. View the Timing Analyzer to verify your design meets timing.
If the compilation does not reach the frequency requirements, follow
these steps:
1. Choose Settings (Assignments menu).
2. Expand Analysis and Synthesis Settings in the category list.
3. Select Speed in Optimization Technique.
4. Expand Fitter Settings.
5. Turn on Optimize Hold Timing and select All Paths.
6. Turn on Fast-corner timing.
7. Click OK.
8. Re-compile the example design by choosing Start Compilation
(Processing menu).
3–14 MegaCore Version 9.1 Altera Corporation
RLDRAM II Controller MegaCore Function User Guide November 2009
Getting Started
1 To achieve a higher frequency, increase the number of
address and command and write data pipeline registers, or
increase the number read data pipeline registers, refer to
step 6 on page 3–5.
To view the constraints in the Quartus II Assignment Editor, choose
Assignment Editor (Assignments menu).
1 If you have “?” characters in the Quartus II Assignment Editor,
the Quartus II software cannot find the entity to which it is
applying the constraints, probably because of a hierarchy
mismatch. Either edit the constraints script, or enter the correct
hierarchy path in the Project Settings tab (refer to step 13 on
page 3–6).
f For more information on constraints, refer to “Constraints” on
page 2–16.
Program a Device
f For more information on OpenCore Plus hardware evaluation using the
Implement Your Design
Set Up Licensing
After you have compiled the example design, you can perform gate-level
simulation (refer to “Simulate the Example Design” on page 3–11) or
program your targeted Altera device to verify the example design in
hardware.
With Altera's free OpenCore Plus evaluation feature, you can evaluate the
RLDRAM II Controller MegaCore function before you obtain a license.
OpenCore Plus evaluation allows you to generate an IP functional
simulation model, and produce a time-limited programming file.
RLDRAM II Controller MegaCore function, refer to “OpenCore Plus
Evaluation” on page 1–4, “OpenCore Plus Time-Out Behavior” on
page 2–12, and AN 320: OpenCore Plus Evaluation of Megafunctions.
In the MegaWizard flow, to implement your design based on the example
design, replace the example driver in the example design with your own
logic.
1 A FIFO buffer is not implemented in the core; you must
implement a FIFO buffer.
You need to obtain a license for the MegaCore function only when you are
completely satisfied with its functionality and performance, and want to
take your design to production.
Altera Corporation MegaCore Version 9.1 3–15
November 2009 RLDRAM II Controller MegaCore Function User Guide
Set Up Licensing
After you obtain a license for RLDRAM II controller, you can request a
license file from the Altera web site at www.altera.com/licensing and
install it on your computer. When you request a license file, Altera emails
you a license.dat file. If you do not have Internet access, contact your
local Altera representative.
3–16 MegaCore Version 9.1 Altera Corporation
RLDRAM II Controller MegaCore Function User Guide November 2009
Additional Information
Revision History
The table below displays the revision history for the chapters in this user
guide.
Date Version Changes Made
November 2009 9.1 Updated the release information.
March 2009 9.0 Updated the release information.
November 2008 8.1 Updated the release information.
May 2008 8.0
May 2007 7.1 No changes.
March 2007 7.0 No changes.
December 2006 6.1
April 2006 1.1.0 Updated format.
October 2005 1.0.0 First published.
How to Contact
● Added timing assignment information for capture to first level resyncronization
registers
● Registers clocked by DQS in the core now use undelayed DQS
● Added timing assignment information for 18 and 36-bit RLDRAM II devices
● Updated device initialization sequence
For the most up-to-date information about Altera products, refer to the
following table.
Altera
Information Type Contact Note (1)
Technical support www.altera.com/mysupport/
Technical training www.altera.com/training/
Technical training services custrain@altera.com
Product literature www.altera.com/literature
FTP site ftp.altera.com
Note to table:
(1) You can also contact your local Altera sales office or sales representative.
Altera Corporation MegaCore Version 9.1 i
RLDRAM II Controller MegaCore Function User Guide
Typographic Conventions
Typographic
This document uses the typographic conventions shown below.
Conventions
Visual Cue Meaning
Bold Type with Initial
Capital Letters
bold type Indicates directory names, project names, disk drive names, file names, file name
Italic Type with Initial Capital
Letters
Italic type Indicates variables. For example, n + 1.
Initial Capital Letters Indicates keyboard keys and menu names. For example, Delete key, and the
“Subheading Title” Quotation marks indicate references to sections within a document and titles of
Courier type
Indicates command names, dialog box titles, dialog box options, and other GUI
labels. For example, Save As dialog box.
extensions, and software utility names. For example, \qdesigns directory,
d: drive, and chiptrip.gdf file.
Indicates document titles. For example, AN 519: Stratix IV Design Guidelines.
Variable names are enclosed in angle brackets (< >). For example, <file name>
and <project name>.pof file.
Options menu.
Quartus II Help topics. For example, “Typographic Conventions.”
Indicates signal, port, register, bit, block, and primitive names. For example,
data1, tdi, and input. Active-low signals are denoted by suffix n. For
example,
Indicates command line commands and anything that must be typed exactly as
it appears. For example,
resetn.
c:\qdesigns\tutorial\chiptrip.gdf.
Also, indicates sections of an actual file, such as a Report File, references to
parts of files (for example, the AHDL keyword
names (for example,
1., 2., 3., and
a., b., c., etc.
● • Bullets indicate a list of items when the sequence of the items is not important.
■
1 The hand points to information that requires special attention.
c
w
r The angled arrow instructs you to press Enter.
f The feet direct you to more information about a particular topic.
ii MegaCore Version 9.1 Altera Corporation
RLDRAM II Controller MegaCore Function User Guide
Numbered steps indicate a list of items when the sequence of the items is
important, such as the steps listed in a procedure.
A caution calls attention to a condition or possible situation that can damage or
destroy the product or your work.
A warning calls attention to a condition or possible situation that can cause you
injury.
TRI).
SUBDESIGN), and logic function
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