HELP for EP2C8 design questions .

[TERRYWU3]

ep2c8

Dear Sir,

I have something confused in FPGA design. Would you please give me any suggestion ?


My FPGA is CYCLONE II EP2C8-208


1. SDR SDRAM control :
May I always enable CKE and always disable DQM for saving my IOs ?

2. SPI serial flash :
- There is a "hold" pin , I need to read/write SPI flash , but this pin seems not
necessary . I want to pull high this pin , is it correct ?
- How many ways to burn data into SPI flash if my data quantity above 16 Mbit ?
My data is picture (BMP format ) , I think that burn speed is important , so
RS-232 transmission is not suitable.

3. If it possible to place an JPEG decoder into EP2C8 ?
How many logic cell does it need ?

4. I add a MCU ( like 8051 ) to communicate with FPGA . If it usable that only use:
data [7..0] => play a address and data bus
clk => strobe signal
RS => for FPGA to recognize data[7..0] is data or address

5. About FPGA Vccint 1.2V , I dont know FPGA power consumption because design
is not finished yet , but my hardware must ready before ,I want to use AME1117
to adjust 1.2V for Vccint , is it OK ?

6. PLL : Does EP2C8 internal PLL could random modified ?
Now I place a clock generator ( ICS307 )

Would you please give me any suggestion for these questions ?

Very very thanks ~

 

[alt007]

hi ,
u can use Power Expert Software by National Semiconductorto know the Power Requiremnet of any Altera FPGA & CPLD.

and
Altera
PowerPlay Early Power Estimator
Cyclone® II Family
v5.1

for Power Solution.


Well AM1117 ADJUSTABLE will work for Vccint foe EP2C8.

regards

alt007

 

[maksya]

1. SDR SDRAM control :
May I always enable CKE and always disable DQM for saving my IOs ?

CKE may be tied HIGH if you don't want to implement power-down mode in your design. DQM's may also have a constant values. In that case you can mask your data inside FPGA (the algorithm of read/write data from/to memory may occur some harder).

2. SPI serial flash :
- There is a "hold" pin , I need to read/write SPI flash , but this pin seems not
necessary . I want to pull high this pin , is it correct ?

HOLD signal prevent unexpected write commands to protect data. If it is not necessary in your design pull it according to recomendations of flash's vendor.