P0071 Terasic Technologies Inc, P0071 Datasheet - Page 87
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P0071
Manufacturer Part Number
P0071
Description
TPAD MULTIMEDIADEVELOPMENT KIT
Manufacturer
Terasic Technologies Inc
Series
tPAD, Cyclone®IVr
Specifications of P0071
Main Purpose
Reference Design, Tablet
Embedded
Yes, FPGA / CPLD
Utilized Ic / Part
EP4CE115
Primary Attributes
8-Inch TFT LCD, LED Backlight
Secondary Attributes
5-Megapixel Digital Image Sensor
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
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Figure 6-8 The setup for the Karaoke Machine
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Many applications use a large external storage device, such as an SD Card or CF card to store data.
The DE2-115 board provides the hardware and software needed for SD Card access. In this
demonstration we will show how to browse files stored in the root directory of an SD Card and how
to read the file contents of a specific file. The SD Card is required to be formatted as FAT File
System in advance. Long file name is supported in this demonstration.
Figure 6-9
shows the hardware system block diagram of this demonstration. The system requires a
50MHz clock provided by the board. The PLL generates a 100MHz clock for the Nios II processor
and other controllers. Four PIO pins are connected to the SD Card socket. SD 4-bit Mode is used to
access the SD Card hardware. The SD 4-bit protocol and FAT File System function are all
implemented by Nios II software. The software is stored in the on-chip memory.
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