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With the Raspberry Pi 4, recognition by some power sources is problematic. The new edition of the hand-held calculator probably can not work with the power supply of the Macbook, other Thunderbolt 3 power supplies seem to pose similar problems. Experts are already on the trail of the cause and resistance seems to be the reason.
The new edition of the hand-held calculator can not work with any power source
The popular Raspberry Pi has recently been released in version 4 and includes a USB-C port, which can be used for power. For proper operation, the Raspberry Pi Foundation provides a power supply of at least 12.5 watts, a 15-watt device is recommended. It turns out that not all power supplies are working well with the mini-calculator. The Scorpia e-blog had badyzed the cause of the problems accurately, according to Golem.
The Raspberry Pi 4 in criticism
First of all, it is clear that the Raspberry Pi 4 with an inserted Macbook power denies service, and that other Thunderbolt 3 power supplies and adapters seem to be generally accepted by the computer as a power source. Expert Tyler Ward sees the cause here as the so-called resistor, which is connected to the Raspberry Pi 4 with two "configuration channels" (CC). "With most power supplies, this is not a problem because single cables require only one DC connection," Ward says.
Therefore, there are problems with active cables with the "E-Mark chip" because they provide additional resistance. As a result, the new Raspberry Pi version of the Raspberry Pi is falsely recognized as an "audio adapter accessory" that does not require power to be powered from the total measured resistance.
Use inactive cables
According to Ward, the solution to the problem described is relatively simple: if a simple cable without an E-mark chip is used instead of an E-Mark cable, the Raspberry Pi 4 should be able to run smoothly – most cables for smartphones fit this type. , Many laptop charging cables, Thunderbolt cables and all 5A cables provide E-Mark chips and are therefore not suitable for operation. "In the long run, though, the best solution would be to redesign Pi 4 (…) to solve the problem," says Ward.
| Technical data of Raspberry 4 | |
|---|---|
| processor | Broadcom BCM2711, 64-bit SoC Cortex-A72 Quad Core at 1.5 GHz |
| RAM | LPDDR4 SDRAM 1GB, 2GB or 4GB (depending on the model) |
| compounds | Dual band WLAN, Bluetooth 5.0, Gigabit Ethernet, 2x USB 3.0, 2x USB 2.0 |
| GPIO | Raspberry Pi Standard GPIO 40-pin header (fully compatible with previous versions) |
| Video and sound | 2x Micro-HDMI (single monitor up to 4K at 60 frames / second or dual monitor up to 4K at 30 frames / second), MIPI DSI display port at 2 channels, MIPI CSI camera at 2-channel, 4-pin stereo and composite video connection |
| multimedia | HEVC / H.265 (4kp60 decoding); AVC / H.264 (1080p60 decoding, 1080p30 encoding), OpenGL ES 3.0 graphics |
| SD card | Micro SD card slot for operating system and data |
| Gre | 85 x 56 millimeters |
| Power source | 5 V DC via USB (3 A minimum), 5 V DC via GPIO (3 A minimum), Power over Ethernet (PoE, requires a separate PoE HUT) |
mini pc, raspberry pi, mini computer, mini calculator, Raspberry Pi 4, Raspberry Pi Foundation
Rasperry Pi Foundation
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