Whakanuia FPGA PCB Hoahoa Poari
Nga korero
2 Nga Ahuatanga Rauemi
2.1 Nga ahuatanga hiko:
[1] Whakauruhia te USB_OTG, USB_UART me te EXT_IN e toru nga tikanga tuku hiko;
[2] Mamati hiko hiko: Ko te whakaputanga o te hiko hiko hiko he 3.3V, a ka whakamahia te arahiko BUCK tino kaha ki te tuku mana mo ARM / FPGA / SDRAM, me etahi atu;
[3] Ko te matua o te FPGA e kaha ana ki te 1.2V, me te whakamahi ano hoki i te iahiko BUCK tino pai;
[4] Kei roto i te FPGA PLL te maha o nga waahanga tairitenga, hei whakarite i te mahi a te PLL, ka whakamahia e matou te LDO hei whakarato i te mana tairitenga mo PLL;
[5] Ko te STM32F767IG e whakarato ana i te tohutoro ngaohiko tairitenga motuhake hei whakarato i te ngaohiko tohutoro mo te ADC / DAC i runga i te maramara;
[6] Ka whakarato i te mana aroturuki me te tohu tohu;
2.2 ARM āhuatanga:
[1] STM32F767IG teitei me te auau matua o 216M;
[2]14 te roha I/O teitei;
[3] Multiplexing ki I/O, tae atu ARM hanga-i roto i SPI / I2C / UART / TIMER / ADC me etahi atu mahi;
[4] Kei roto i te 100M Ethernet, te atanga USB-OTG tere-tere me te USB ki te mahi UART mo te patuiro;
[5] Kei roto ko te 32M SDRAM, te atanga kaari TF, te atanga USB-OTG (ka taea te hono ki te kōpae U);
[6] 6P FPC atanga patuiro, whāurutau paerewa ki te urutau ki te atanga 20p whānui;
[7] Te whakamahi i te 16-bit parallel parallel communication;
2.3 Nga waahanga FPGA:
[1] Kei te whakamahia te raupapa FPGA EP4CE15F23C8N o Altera whakatipuranga tuawha;
[2] Tae atu ki te 230 nga whakawhanui I/O tino mahi;
[3] Ka whakawhānuihia e te FPGA te SRAM maramara-rua me te kaha o te 512KB;
[4] Aratau whirihora: tautoko JTAG, AS, aratau PS;
[5] Tautoko te uta i te FPGA ma te whirihoranga ARM;Ko te mahi AS PS me whiriwhiri ma te peke;
[6] Te whakamahi i te 16-bit parallel parallel communication;
[7] Tauranga patuiro FPGA: FPGA JTAG tauranga;
2.4 Ētahi atu āhuatanga:
[1] Ko te USB o iCore4 e toru nga momo mahi: aratau DEVICE, aratau HOST me te aratau OTG;
[2] Ko te momo atanga Itarangi he 100M te taapiri katoa;
[3] Ka taea te kowhiri i te aratau tuku hiko ma te pekepeke, ko te atanga USB he hikoi tika, ma te pane pane ranei (5V hiko hiko);
[4] E rua nga patene motuhake e whakahaerehia ana e te ARM me te FPGA;
[5] Ko nga rama rama e rua o te iCore4 heterogeneous rua-matua poari whakahaere ahumahi e toru nga tae: whero, matomato me te puru, e whakahaeretia ana e te ARM me te FPGA;
[6] Whakauruhia te 32.768K tioata hāngū ki te whakarato RTC karaka wā-tūturu mo te pūnaha;