bus-width = <8>; status = "okay"; ti,non-removable; }; root@:/home/user#cat sys/kernel/debug/mmc1/ios clock: 52000000 Hz vdd: 21 (3.3 ~ 3.4 V) bus mode: 2 (push-pull) chip select: 0 (don't care) power mode: 2 (on) bus width: 2 (4 bits) timing spec: 1 (mmc high...
one can check if all 8 emmc data lines are operating fine observing them with oscilloscope and bare metal sdk test (can be found on SMP Enable in IMX6 ) Also one can adjust drive strength emmc/imx signals as described below or try other emmc https://community.nxp.com/thread...
};staticunsignedbus_widths[] = { MMC_BUS_WIDTH_8, MMC_BUS_WIDTH_4, MMC_BUS_WIDTH_1 };unsignedidx, bus_width =0;if(host->caps & MMC_CAP_8_BIT_DATA) idx =0;elseidx =1;for(; idx < ARRAY_SIZE(bus_widths); idx++) { bus_width = bus_widths[idx];if(bus_width == MMC_BUS...
我们自己做的板子,硬件连接设计NorFlash的数据总线为8bit。但是我看RBL的SourceCode,RBL引导EMIF启动的时候数据总线是16bit,这样的话,我们的板子是不是不能实现EMIF NorFlash启动,紧急求助TI各位大神帮忙。
因为连最普通的ATI R9000的显存带宽都要达到400MHz*128Bit/8=6.4GB/s,，其余的高端显卡更是不用说了。bus width就是显存位宽，单位是Bit，和bandwidth就是显存带宽的关系就是这个公式：显存位宽*显存频率/8=显存带宽 显存位宽的大小影响着显存带宽的大小，显存带宽的大小取决于显存位宽和显存频率。
A one-chip IC, having a function module for converting bus widths at least between 32 and 16 bits and between 32 and 8 bits and peripheral control function modules connected to an internal bus through the bus width-conversion function module, is arranged between various peripheral devices and ...
The converter makes a 16-bit data bus microprocessor compatible with peripherals, expansion devices and associated software designed for an 8-bit data bus. The 16-bit data bus (50. 52) is divided into high and low portions. The low portion (52) handling bits DO to D7 is coupled to the...
*/ @@ -252,6 +260,8 @@ static void esdhc_of_platform_init(struct sdhci_host *host) if (vvn > VENDOR_V_22) host->quirks &= ~SDHCI_QUIRK_NO_BUSY_IRQ; + + host->mmc->caps |= MMC_CAP_8_BIT_DATA; } static void esdhc_pltfm_set_bus_width(struct sdhci_host *host, int ...
only an 8-bit data bus width . This meant that data were processed within the CPU chip itself in 16-bit chunks but could only be moved 8 bits at a time between the CPU , primary storage , and external devices. 用于原始的IBM的8088芯片个人计算机,例如,有16位词长,但仅一个8位数据总线...
你需要找到与/ps8_0_axi_periph接口相连的另一个AXI接口,并检查其awuser_width的设置值。确保这两个值完全一致。 4. 如果不一致,确定导致不匹配的原因 不匹配的原因可能有很多,包括但不限于: 在Block Design中手动修改了某个接口的awuser_width值,但没有相应地修改另一个接口的值。 使用了预定义的IP核,并...