参数资料
型号: HW-V5-ML561-UNI-G
厂商: Xilinx Inc
文件页数: 126/140页
文件大小: 0K
描述: EVALUATION PLATFORM VIRTEX-5
产品变化通告: Adapter Replacement 23/May/2008
Development Systems Discontinuation 16/Jan/2012
标准包装: 1
系列: Virtex®-5 LXT
类型: FPGA
适用于相关产品: XC5VLX50T-FFG1136
所含物品: 开发平台,小型闪存卡,缆线,DDR2 DIMM,电源和软件
相关产品: XC5VLX50T-3FFG665C-ND - IC FPGA VIRTEX-5 50K 665FCBGA
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Appendix C: LCD Interface
R
Controller – Power Supply Circuits
Figure C-5 shows the power supply circuits. The power supply is used in the five times
boost mode, where VDD is 3.3V and VOUT is 16.5V. VOUT is the operating voltage of the
operational amplifier delivering the operating voltage, V0, for the LCD panel.
DUTY1
DUTY2
B S T S
VR
M S
INTR S
VOUT
5 x VDD
2
17 VDD
VDD
18 VOUT
25
26
27
28
29
VDD
1
30 V SS 1
V SS
V SS
16 V SS
DCDC5B
UG199_C_05_050106
Figure C-5:
Power Supply Circuits
The LCD operating voltage, V0, is set with two resistors R A and R B . INTRS is driven Low
when the resistors are external. INTRS is driven High when the resistors are internal. For
the Virtex-5 FPGA ML561 Development Board, internal resistors are selected.
The LCD operating voltage (V0) and the Electronic Volume Voltage (V EV ) can be calculated
in units of V using Equation C-1 and Equation C-2 :
V 0 = ? ? ? ? × V EV
1 + ------ B -
R
V EV = ? ? ? ? × V REF
R
A
63 – α
1 – ---------------
300
Equation C-1
Equation C-2
In Equation C-2 , V REF is equal to 2.0V at 25 ° C.
The values of the reference voltage parameter, α , and the ratio R A /R B are determined with
bit settings in the LCD controller ’s instruction registers. Thus, it is possible to change
physical operating parameters of the LCD through register bit settings, controlling the
operating voltage, and the electronic volume level.
126
Virtex-5 FPGA ML561 User Guide
UG199 (v1.2.1) June 15, 2009
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