![Mike on Twitter: "USB-C question: I've seen others pull down CC1 & CC2 through a 5.1K resistor many times but the STM32 BlackPill appears to connect them to each other.? https://t.co/p3RjMr1Bvm" / Mike on Twitter: "USB-C question: I've seen others pull down CC1 & CC2 through a 5.1K resistor many times but the STM32 BlackPill appears to connect them to each other.? https://t.co/p3RjMr1Bvm" /](https://pbs.twimg.com/media/E9zwYWaXIAkEuMf.jpg)
Mike on Twitter: "USB-C question: I've seen others pull down CC1 & CC2 through a 5.1K resistor many times but the STM32 BlackPill appears to connect them to each other.? https://t.co/p3RjMr1Bvm" /
![Share about Firmware-Hardware and the latest USB Type-C PD technology. : USB Type-C Configuration Channel (CC) pin function (English version) Share about Firmware-Hardware and the latest USB Type-C PD technology. : USB Type-C Configuration Channel (CC) pin function (English version)](http://1.bp.blogspot.com/-MeDQDtxyuSE/U_F-lcfK78I/AAAAAAAAAfM/2kMzMfo8GIE/s1600/TypeC_host_device.jpg)
Share about Firmware-Hardware and the latest USB Type-C PD technology. : USB Type-C Configuration Channel (CC) pin function (English version)
![Amazon.com: 2pcs 12 inch Type-C USB C Male PD Power Cable 5A Fast Charge 6 Wires CC1 CC2 Pigtail DIY, 1 feet : Electronics Amazon.com: 2pcs 12 inch Type-C USB C Male PD Power Cable 5A Fast Charge 6 Wires CC1 CC2 Pigtail DIY, 1 feet : Electronics](https://m.media-amazon.com/images/I/51LZ09LqRxL._AC_UF1000,1000_QL80_.jpg)
Amazon.com: 2pcs 12 inch Type-C USB C Male PD Power Cable 5A Fast Charge 6 Wires CC1 CC2 Pigtail DIY, 1 feet : Electronics
![Is it necessary to connect the CC1/CC2 pins to ground with a 5.1k resistor? I would like to make a pcb which has a female usb type c port which converts to Is it necessary to connect the CC1/CC2 pins to ground with a 5.1k resistor? I would like to make a pcb which has a female usb type c port which converts to](https://preview.redd.it/is-it-necessary-to-connect-the-cc1-cc2-pins-to-ground-with-v0-1jgv4d4glr0a1.png?width=640&crop=smart&auto=webp&s=c6ea2e2cc30809c2590b1fe62d20a02bfc314ceb)