Introduction

This is the Raspberry Pi 5, compared to the Raspberry Pi 4B, its processor speed is 2-3 times that of the previous generation product, it has rich multimedia, multiple memory versions, and better connectivity. It is integrated with the RP1 I/O controller, USB3 with greater total bandwidth, and a new PCIe interface, offering faster transmission speeds.

Features

• Broadcom BCM2712 (Arm Cortex A76)
• 64-bit 2GHz quad-core, 512KB L2 cache and 2MB shared L3 cache
• Multiple memory and EMMC options
• Gigabit Ethernet
• 2.4GHz/5GHz dual-band 802.11ac Wi-Fi
• Bluetooth 5.0, BLE
• USB 3.0 x 2 (supports 5Gbps synchronous operation), USB 2.0 x 1
• HDMI x 2 (supports 4Kp60)
• TF card
• GPIO × 28
• 2 × 4-lane MIPI DSI/CSI interface
• USB Type C Power (5V/5A)
• Real-time clock (RTC), powered from external battery
• PCIe 2.0 interface x1

Dimensions

Adaptation of CM4 baseboard

Click [here] for more details

Fan control

The PI5 fan defaults to starting when the temperature reaches 50 degrees. If you want to control it at other temperatures, you can do so by adding specific content to /boot/firmware/config.txt, for example:

dtparam=fan_temp0=36000,fan_temp0_hyst=2000,fan_temp0_speed=90
dtparam=fan_temp1=40000,fan_temp1_hyst=3000,fan_temp1_speed=150
dtparam=fan_temp2=52000,fan_temp2_hyst=4000,fan_temp2_speed=200
dtparam=fan_temp3=58000,fan_temp3_hyst=5000,fan_temp3_speed=255

Among them:

fan_temp0/1/2/3               Indicates the temperature (36000 means 36℃)

fan_temp0/1/2/3_speed  Indicates the corresponding rotational speed (value up to 255)

fan_temp0/1/2/3_hyst      Indicates the hysteresis temperature

For more details, refer to here

Notice: There are only 4 temperatures, 0, 1, 2 and 3, and it's not possible to set other temperatures. The hysteresis temperature must not exceed the step range between two temperatures

MIPI

Support dual MIPI, customers can freely choose CSI or DSI connections
The DSI screen is 800x480 resolution screen by default, please refer to the corresponding WIKI for other resolution screens

DSI

#Add the following to the config.txt file:
sudo nano /boot/firmware/config.txt
#DSI1 
dtoverlay=vc4-kms-dsi-7inch,dsi0
#DSI0 
dtoverlay=vc4-kms-dsi-7inch,dsi1

CSI

Add the following to the config.txt file:

sudo nano /boot/firmware/config.txt

Allow one connection to DSI and one connection to CSI, for example, use IMX219 to connect to MIPI1
For example, if you want to connect a DSI display to MIPI0, add the following to the config.txt file

dtoverlay=imx219,cam1
dtoverlay=vc4-kms-dsi-7inch,dsi0

Real-Time Clock (RTC)

There is no battery by default, and an additional RTC battery (CR/ML2032 battery) is required

Software debugging

The default device is /dev/rtc0

Regarding time, by inputting "date" in the command line, you can see the current time. Connecting the Raspberry Pi system to the network will automatically synchronize the time. If the default RTC device is connected and functioning properly, the RTC time will be updated after the automatic network synchronization

sudo hwclock -r Read the RTC time, if there are multiple RTC devices, you can use -f to select the corresponding devices (for example: sudo hwclock -f /dev/rtc1 -r)

Hwclock

System clock -> Hardware clock (RTC)

sudo hwclock -w

Synchronize hardware clock (RTC) -> System clock

sudo hwclock  -s
 #Need to turn off the network, or disable network time synchronization, otherwise it will be changed back

Set the hardware clock time (RTC):

sudo hwclock --set --date="9/8/2023 16:45:05"

View the hardware clock (RTC)

sudo hwclock -r

Show version information.

sudo hwclock --verbose

Automated wakeup

To support a low-power mode for wake-up alarms, add the configuration:

sudo -E rpi-eeprom-config --edit
#Add the following 2 lines
POWER_OFF_ON_HALT=1
WAKE_ON_GPIO=0
#Restart the device after adding (if you connect to the serial port log, you can see that there are update related logs)
sudo reboot
#You can use the following methods to test the function:
echo +600 | sudo tee /sys/class/rtc/rtc0/wakealarm
sudo halt  or  sudo poweroff
#10 minutes later, it will be awakened and restarted

RTC battery charging

Note: Before adding this, make sure your RTC battery allows charging and check the maximum allowable voltage

sudo nano /boot/firmware/config.txt
#Add
dtparam=rtc_bbat_vchg=3000000
#Among these, 3,000,000 represents the maximum voltage. Charging will stop when it reaches 3V, and the charging will restart with a trickle charge when the voltage drops below 3V

Support