最終更新:2024-11-06 (水) 03:39:05 (1d)
Raspberry Pi 4 Model B
Top / Raspberry Pi 4 Model B
2019/06/24
https://www.raspberrypi.org/products/raspberry-pi-4-model-b/
product brief
リビジョン
- cat /proc/cpuinfo | grep Model
- https://pip.raspberrypi.com/categories/560-pcn
- https://www.jeffgeerling.com/blog/2021/raspberry-pi-4-model-bs-arriving-newer-c0-stepping
製造
電源
- 5V 3A, type-C
スペック
- 1GB, 2GB, or 4GB of LPDDR4? SDRAM
- Full-throughput Gigabit Ethernet
- Dual-band 802.11ac wireless networking
- Bluetooth 5.0
- Two USB 3.0 and two USB 2.0 ports
- Dual monitor support, at resolutions up to 4K
- VideoCore VI graphics, supporting OpenGL ES 3.x
- 4Kp60 hardware decode of HEVC video
- Complete compatibility with earlier Raspberry Pi products
- 2×microHDMI ports (up to 4kp60 supported)
SoC
- BCM2711
C0ステッピング A 1.8GHz quad-core 64-bit ARM Cortex-A72 CPU B0ステッピング A 1.5GHz quad-core 64-bit ARM Cortex-A72 CPU
メモリ
- 最初は1,2,4
- 今は2,4,8
その他
- H.265 (4Kp60 decode);
- H.264 (1080p60 decode, 1080p30 encode);
- OpenGL ES 3.0 graphics
OS
USB 3.0コントローラ
買ったやつ
- 4GB
4K
- By default, when connected to a 4K monitor, the Raspberry Pi 4B, 400 and CM4 will select a 30Hz refresh rate. Use this option to allow selection of 60Hz refresh rates.
- hdmi_enable_4kp60
- It is not possible to output 4Kp60 on both micro HDMI ports simultaneously.
- Setting hdmi_enable_4kp60 will increase power consumption and the temperature of your Raspberry Pi.
8GBモデル
32bitOS
- only individual processes are limited to 3gb, the OS itself can use it all. We use LPAE for this.