Hi, For the Spartan-II, the preconfiguration pullup resistors were selected by the M2 configuration pin. What about for the Spartan-3? My new design has to connect an ARM7TDMI bus to the SPARTAN-3. I need to make sure my ucLinux will boot correctly, and so make sure about the IO pins states of the SPARTAN-3 on the poweron. Regards, Laurent
Spartan-3 : preconfiguration pull-up/float ?
Started by ●September 15, 2003
Reply by ●September 16, 20032003-09-16
Like Virtex-II and Virtex-II Pro, the Spartan-3 FPGA pre-configuration pull-up resistors are controlled by the HSWAP_EN pin. 0 = Enables weak pull-up resistors on all pins not actively involved in the configuration process. 1 = No pull-up resistors during configuration. After configuration, this pin is not used and should be kept at a logic 0 or 1. See page 13 of the Spartan-3 data sheet (Module 4, Pinouts) for more information. http://direct.xilinx.com/bvdocs/publications/ds099-4.pdf --------------------------------- Steven K. Knapp Applications Manager, Xilinx Inc. Spartan-3/II/IIE FPGAs http://www.xilinx.com/spartan3 --------------------------------- Spartan-3: Make it Your ASIC "Amontec Team" <laurent.gauch@www.DELALLCAPSamontec.com> wrote in message news:3f65851f$1@news.vsnet.ch...> Hi, > > For the Spartan-II, the preconfiguration pullup resistors were selected > by the M2 configuration pin. What about for the Spartan-3? > > My new design has to connect an ARM7TDMI bus to the SPARTAN-3. I need to > make sure my ucLinux will boot correctly, and so make sure about the IO > pins states of the SPARTAN-3 on the poweron. > > Regards, > Laurent >