参数资料
型号: HW-SPAR3A-SK-UNI-G
厂商: Xilinx Inc
文件页数: 46/143页
文件大小: 0K
描述: KIT STARTER W/SPARTAN-3A
产品培训模块: FPGAs Spartan3
产品变化通告: Adapter Replacement 23/May/2008
标准包装: 1
系列: Spartan®-3A
类型: FPGA
适用于相关产品: Spartan?3A FPGA,XC3S700A-FG484
所含物品: 板,线缆,文档,电源
相关产品: XC3S700A-5FTG256C-ND - IC FPGA SPARTAN-3A 256K 256FTBGA
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XC3S700A-5FGG484C-ND - IC SPARTAN-3A FPGA 700K 484FBGA
XC3S700A-5FGG400C-ND - IC SPARTAN-3A FPGA 700K 400FBGA
XC3S700A-5FG484C-ND - IC SPARTAN-3A FPGA 700K 484FBGA
XC3S700A-5FG400C-ND - IC SPARTAN-3A FPGA 700K 400FBGA
XC3S700A-4FG484I-ND - IC SPARTAN-3A FPGA 700K 484FBGA
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其它名称: 122-1514
Chapter 5: Character LCD Screen
Character LCD Interface Signals
Table 5-1 shows the interface character LCD interface signals.
R
Table 5-1:
Character LCD Interface
Signal Name
LCD_DB<7>
LCD_DB<6>
LCD_DB<5>
LCD_DB<4>
FPGA Pin
Y15
AB16
Y16
AA12
Data bit DB7
Data bit DB6
Data bit DB5
Data bit DB4
Function
LCD_DB<3>
LCD_DB<2>
LCD_DB<1>
AB12
AB17
AB18
Data bit DB3
Data bit DB2
Data bit DB1
When using the four-bit
interface, drive these signals
High.
LCD_DB<0>
LCD_E
LCD_RS
LCD_RW
Y13
AB4
Y14
W13
Data bit DB0
Read/Write Enable Pulse
0: Disabled
1: Read/Write operation enabled
Register Select
0: Instruction register during write operations.
Busy Flash during read operations
1: Data for read or write operations
Read/Write Control
0: Write, LCD accepts data
1: Read, LCD presents data
Voltage Compatibility
The character LCD is power by +5V. The FPGA I/O signals are powered by 3.3V. However,
the FPGA’s output levels are recognized as valid Low or High logic levels by the LCD. The
LCD controller accepts 5V TTL signal levels and the 3.3V LVCMOS outputs provided by
the FPGA meet the 5V TTL voltage level requirements.
The 390 Ω series resistors on the data lines prevent overstressing on the FPGA and
StrataFlash I/O pins when the character LCD drives a High logic value. The character LCD
drives the data lines when LCD_RW is High. Most applications treat the LCD as a write-
only peripheral and never read from the display.
UCF Location Constraints
Figure 5-2 provides the UCF constraints for the Character LCD, including the I/O pin
assignment and the I/O standard used.
46
Spartan-3A FPGA Starter Kit Board User Guide
UG330 (v1.3) June 21, 2007
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