EPCS128SI16N データシートの表示（PDF） - Altera Corporation
部品番号
コンポーネント説明
メーカー
EPCS128SI16N Datasheet PDF : 38 Pages
| |||
3–2
Chapter 3: Serial Configuration Devices (EPCS1, EPCS4, EPCS16, EPCS64, and EPCS128) Data Sheet
Functional Description
Functional Description
With SRAM-based devices that support active serial configuration, configuration data
must be reloaded each time the device powers up, the system reconfigures, or when
new configuration data is required. Serial configuration devices are flash memory
devices with a serial interface that can store configuration data for FPGA devices that
support active serial configuration and reload the data to the device upon power-up
or reconfiguration. Table 3–1 summarizes the features of the Altera configuration
devices and the amount of configuration space they hold.
Table 3–1. Altera Configuration Devices (Note 1), (2)
Device
Memory Size
(bits)
On-Chip
Decompression ISP
Support
Support
Cascading
Support
Reprogrammable
Operating
Voltage (V)
EPCS1
1,048,576
No
Yes
No
Yes
3.3
EPCS4
4,194,304
No
Yes
No
Yes
3.3
EPCS16
16,777,216
No
Yes
No
Yes
3.3
EPCS64
67,108,864
No
Yes
No
Yes
3.3
EPCS128
134,217,728
No
Yes
No
Yes
3.3
Notes to Table 3–1:
(1) To program these devices using Altera Programming Unit or Master Programming Unit, refer to Altera Programming Hardware Data Sheet.
(2) The EPCS device can be re-programmed in system with Byte Blaster II download cable or an external microprocessor using SRunner. For more
information about SRunner, refer to the AN418, SRunner: An Embedded Solution for EPCS Programming.
For an 8-pin SOIC package, you can migrate vertically from the EPCS1 to the EPCS4
or EPCS16 because the EPCS devices are offered in the same device package.
Similarly, for a 16-pin SOIC package, you can migrate vertically from the EPCS16 to
the EPCS64 or EPCS128.
Use the compression ratio calculation to determine the FPGA device to fit the EPCS.
Example 3–1. Compression Ratio Calculation
EP4SGX530 = 189,000,000 bits
EPCS128 = 134,217,728 bits
Preliminary data indicates that compression typically reduces the configuration
bitstream size by 35% to 55%. We take the worst case that is 35% compression.
189,000,000 bits × 0.65 = 122,850,000 bits
It fits EPCS128 device.
With the new data-decompression feature in Arria series, Cyclone series, and all
device families in the Stratix series except the Stratix device family, you can use
smaller serial configuration devices to configure larger FPGAs.
1 Serial configuration devices cannot be cascaded.
f For more information about the FPGA decompression feature, refer to the
configuration chapter in the appropriate device handbook.
Configuration Handbook (Complete Two-Volume Set)
© December 2009 Altera Corporation
Share Link: 