当Vccio=3. 3V时, 对于输入脚, 它兼容TTL, CMOS电平；对输出脚, 它是否也兼容TTL和CMOS电平？对CMOS电平, 是否需要用OpenDrain 加上下拉电阻来实现？
2019-09-03 05:55
| OpenDrain: 0| Pullup: 0| Pulldown: 0| Intr:0 I (328) gpio: GPIO[27]| InputEn: 0| OutputEn: 1| OpenDrain: 0
2024-06-25 06:39
: 6700445I (926) gpio: GPIO[4]| InputEn: 0| OutputEn: 1| OpenDrain: 0| Pullup: 0| Pulldown: 0| Intr:0 I
2023-02-14 07:56
cardI (326) example: Using SPI peripheralI (336) gpio: GPIO[13]| InputEn: 0| OutputEn: 1| OpenDrain: 0
2023-02-21 06:09
| PIN_GPIO_HIGH | PIN_OPENDRAIN, Board_I2C0_SCL0 | PIN_GPIO_OUTPUT_EN | PIN_GPIO_HIGH | PIN_OPENDRAIN,但是并没有能打通，采集不了数据，请问一下，我该怎么做？
2016-04-06 10:25
: 6700445 I (926) gpio: GPIO[4]| InputEn: 0| OutputEn: 1| OpenDrain: 0| Pullup: 0| Pulldown: 0| Intr:0 I
2024-06-17 07:06
| InputEn: 0| OutputEn: 0| OpenDrain: 0| Pullup: 1| Pulldown: 0| Intr:0I (1369) gpio: GPIO[10
2023-03-06 07:50
: Mounting filesystemI (1359) gpio: GPIO[8| InputEn: 0| OutputEn: 0| OpenDrain: 0| Pullup: 1| Pulldown: 0
2023-02-13 07:14
filesystem I (1359) gpio: GPIO[8| InputEn: 0| OutputEn: 0| OpenDrain: 0| Pullup: 1| Pulldown: 0| Intr:0
2024-06-14 06:57
: Attribute opendrain off is not valid for part?????3、32513 Warning: Net 'GND' is floating????求各位大侠给予指点
2014-01-14 21:41
