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RAMCHECK automatically identifies the presence of the
new DDR2 adapter. |
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RAMCHECK prompts the user to insert a 240-pin DDR2
module and start the test with F1. |
BASIC TEST |
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Basic Test screen shows the size, the speed, the
voltage, the test pattern, the module's bank and the CAS Latency. This example
shows testing at 667MHz with an automatic setting of CAS Latency to the default
value of CL=4 for this frequency. |
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In this Basic Test screen we test a 32Mx72 ECC module at
533MHz with the default CAS Latency of 4. This module is unbuffered.
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In this Basic Test screen we test a 128Mx64 (1GB) module
at 533MHz with a reduced CAS Latency of 3. Some 533MHz modules which are
normally designed for CL=4 may still pass tests conducted at the more demanding
CL=3. |
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The new DDR2 adapter supports all popular Registered
modules. In this Basic Test screen we test a Registered 128Mx72 (1GB) module at
533Hz with the default CAS Latency of 4. |
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In this Basic Test screen we test an Unbuffered 128Mx72
(1GB) module at 400MHz with the default CAS Latency of 3. |
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In addition to the industry standard frequencies of
400MHz, 533MHz and 667MHz, we also offer testing at the additional frequencies
of 600MHz and 466MHz. These frequencies can be used to gauge if a given module
can run at slightly higher frequencies than it is marked for. |
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This screen appears upon a successful completion of the
Basic Test. It is followed with several detailed screens with detailed
information about the module's size and structure. |
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A PC2-6400 module can be tested at the maximum 667MHz
speed of the DDR2, although the module may run at 800MHz (at the proper setup
of CAS Latency and Voltage) in the application. The adapter is fully compatible
with the PC2-6400 modules while testing them at a slower speed.
PC2-5400/4200/3200 are tested at their nominal maximum speed as shown in the
table below. |
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This sample structure information screen indicates that
the module was tested at the default 1.80V. CAS Latency was the default 3/4
setting, in which the program automatically select CL=4 for frequencies of
533MHz and higher. |
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An abundance of test results are automatically entered
into the Test Log. This sample Test Log screen indicates that the module was
tested at 1.90V. Its size of 512MB is made of individual chips of 4x16Mx8,
namely 4 chip banks, 16Mb size and width of 8 bits per chip. |
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This sample structure information screen states that the
currently tested PC2-6400 module has its SPD set for 800MHz at CL 5 and 667MHz
at CL4. |
PARAMETERS, CHANGE-ON-THE-FLY AND SETUP |
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Expanded CHANGE-ON-THE-FLY can be used to set up the
Frequency, the Voltage, the CAS LATENCY and the Refresh rate only for the
current test. Following the current test, it returns to the current setup
parameters. |
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Here we demonstrate how the module's frequency is
overrided to 667MHz from a previous test at 533MHz. |
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CAS Latency can be set at 2,3,4,5,6. Please note that
not all DDR2 modules support CL of 2 and 6. By default, the test program
selects CL=3 for 400MHz and 466MHz, and CL=4 for 533MHz and 667Mhz. At 667MHz,
the test program dynamically tries to test the module at CL=5 if CL=4
fails. |
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This example shows testing at 533MHz with a forced CAS
Latency of CL=5. This test ended successfully. |
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The new DDR2 VDD Voltage setup allows the user to change
on-the-fly the test voltage in the range 1.5V-2.2V. When set to AUTO, RAMCHECK
automatically tests the module at 1.8V/1.9V. In this example, the user is
selecting a VDD of 1.94 Volt. |
WIRING ERRORS DETECTION |
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Unlike older DDR, the DDR2 devices utilize the
differential DQS technique which assigns a pair of two control lines per each
DQS. In this test error example, DQS4 line (pin 84) was stuck at 1. |
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The DDR2 module uses new ODT control line. In this test
error example, line ODT1 (pin 77) is shorted to ground. |
EXTENSIVE TEST |
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During Voltage Cycling, the module is tested at various
voltages, which are automatically selected based on the current frequency.
Higher frequencies require higher voltages. |
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The March UP/DOWN test attempts to capture pattern
sensitivity and addressing errors. |
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The Extensive Test ends with the Final Test. The module
is heated up by this point so that the test indicates the ability of the module
to work at elevated temperature. |
AUTO-LOOP TEST |
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The AUTO-LOOP test is great for extended burn-in. This
test continues forever when there are no failures in the device. It is
terminated by the user. It similarly follows our standard AUTO-LOOP for SDRAM
and DDR1 devices. |