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Honored Contributor
Honored ContributorPassive Serial Tri-state
I am designing a Cyclone IV based board with an SPI interface that we would like to use to configure the FPGA with an MCU. We will configure the pins to toggle like Figure 8-16 (Device Handbook Vol ...
Altera_ForumHonored Contributor
Honored Contributor --- Quote Start --- Yes, this makes sense. Indeed our code is off chip. So we will need to modify our bootloader. --- Quote End --- That sounds about right; your RBF is used to PS configure the FPGA, which includes a NIOS II processor that boots from on-chip RAM, that on-chip RAM contains the bootloader that then starts the system. eg, by reading data from some external bus (flash, SRAM that your processor has written to, etc). Cheers, Dave
