This　article　introduces　the　basic　concept　of　on-chip　programmable　system　and　explains　how　to　use　ARM　Design　Start　IP　core　to　design　peripherals　on　FPGA　to　build　your　own　system,　focusing　on　the　description　of　AHB　peripheral　modules　and　implementation　of　software.　This　paper　presents　a　network　system　built　with　W5500　chip　and　ARM　Cortex　M0　soft　core,　which　is　simple　in　structure　and　easy　to　implement.