RT600/700 GPIO Slew Rate Control 04-11-202402:39 PM 826 Views aaronchin Contributor II Hi NXP, In the RT600 and RT700 reference manual there is a GPIO setting to configure a GPIO's slew rate. This setting is either "disabled (default)" or "enabled." How is this setting tuning ...
3.1 pinctrl数据结构 struct pinctrl_dev是内核中对pin control一类设备的抽象。 structpinctrl_dev {structlist_head node;structpinctrl_desc *desc;--对应的pin controller描述信息。structradix_tree_root pin_desc_tree; #ifdef CONFIG_GENERIC_PINCTRL_GROUPSstructradix_tree_root pin_group_tree; unsignedintnum_...
pins= <PINMUX_GPIO1__FUNC_GPIO1>;---设置GPIO mode,在boot/dts/中mtxxxx-pinfunc.h里有定义slew-rate = <0>;---设置GPIO dir,0为input,1为outputbias-pull-down= <11>;---设置pull enable,下拉,后面的11并无影响,写00也可以input-schmitt-enable= <0>;---设置SMT enable}; };yyy: config1 ...
PORT_PCR_MUX(0) :Pin Multiplex Control 設定為 0,表示 P0_6 為 GPIO 功能,MCXN23xRM Page 119 ( 如圖 26 ) PORT_PCR_DSE(0) :Drive Strength 參數設定為 low PORT_PCR_ODE(0) :Disable Open Drain 功能 PORT_PCR_PFE(0) :Disable Passive Filter 功能 PORT_PCR_SRE(0) :Slew Rate 設定為 Fas...
Application note 9 001-86439 Rev.*M 2024-03-01 PSoC™ 4 MCU - Using GPIO pins GPIO pin basics Digital Logic In Output Enable Drive Mode Vdd Vdd Vdd Slew Control PIN Figure 7 Digital output driver Slew-rate control is provided to reduce EMI and cross-talk. There are two options –...
/* Slow Slew Rate - Receiver Disabled - Pullup - PU/PD feature Enabled. */ #define PAD_SL_RXD_PU_PUPDE(n) (CONTROL_CONF_PULLUPSEL | \ CONTROL_CONF_RXACTIVE | \ CONTROL_CONF_MUXMODE(n)) #define LED_INST_BASE_ADD(SOC_GPIO_1_REGS) ...
Slew rate controlSlew Rate 0—slow) 1—medium 2—fast (default) I/O delayInput Delay Chain SettingRefer to the device data sheet Output Delay Chain Setting Bus-hold4Enable Bus-Hold Circuitry On Off(default) Weak pull-up resistor5Weak Pull-Up Resistor ...
Digital Logic Out Out pu t Enable Drive Mode VDD VDD VDD Slew Rate Control Pin Figure 2 Digital output driver Slew rate control is provided to reduce the EMI and crosstalk and is configured using the SLOW bit of the Port Output Configuration register (GPIO_PRTx_CFG_OUT). There...
Drive strength control and slew rate control are included in the GPIO implementation. Since many GPIOs could be placed in an IO ring (IOs placed around the periphery of the chip), its placement optimization is important for optimal chip area, as well as, robust IO ring from performance and...
If you look at the pin control definitions in arch/arm64/boot/dts/freescale/fsl-imx8mq-var-dart-common.dtsi in the Linux kernel source tree, the number to the right of the pin mux macro can be used for additional attributes like pull-up, slew rate, open drain, drive strength, etc....