Librem 5 Phone – Birch¶
The sections on this page contain information about the Birch revision of the Librem 5 phone.
Quick Start Guide¶
The version of the Quick Start Guide included with the phone can be downloaded: Librem5-Quick-Start-1.0.3.pdf
Components¶
System on Chip and Peripherals¶
Customer grade i.MX 8M Quad [datasheet] and [reference manual]
Four ARM Cortex-A53 cores.
One Cortex-M4.
Vivante GC7000Lite graphics
1 ⨉ Gigabit Ethernet
32 GB eMMC
3GB RAM
SPI NOR Flash
Real Time Clock (RTC)
Audio¶
Wolfson Media WM8962
Headphones and external microphone via CTIA-configured 3.5mm jack
Loudspeaker
Battery¶
Texas Instruments BQ25895 battery charge controller [datasheet]
Bluetooth, Wi-Fi, WWAN¶
Bluetooth I2S interface
Bluetooth (SDIO)
RedPine WiFi/BT M.2 module on SDIO
Broadmobi BM818-E1 or BM818-A1 WWAN module
Camera¶
Display¶
Mantix MLAF057WE51 MIPI DSI LCD panel: 720x1440 pixels and touch controller
GNSS¶
Teseo-LIV3F multiconstellation GNSS receiver (UART2 interface and antenna)
Hardware Kill Switches¶
Diodes Incorporated Power Switch [datasheet]
WWAN (Modem)
WiFi/Bluetooth
Microphone and Camera
LEDs¶
Used for indicating charging status
nano-SIM and microSD Cards¶
Combined microSD and nano-SIM slot
Sensors and Motors¶
Haptic motor
Vishay VCML4040 proximity and ambient light sensor [datasheet]
Smart Card¶
Test Points¶
The 15 test points for UART1, UART2, JTAG, and the BOOT_MODE0/1 pins can be found below the WLAN module on the rear of the phone, as shown with the rear cover removed.
See a larger version of this image
The USB test points are located in the recessed area above the battery compartment.
USB¶
Serial Downloader support (loading u-boot via USB)
USB-C port including USB-C role switching
Schematics¶
The following schematics are available:
Librem 5 Birch main board:
librem5_birch_mainboard_schematic.pdf
Librem 5 Birch USB C board:
librem5_birch_usb-c_board_schematic.pdf
X-Rays¶
The images below show X-ray images of the circuit boards. Click on the images to see larger versions.
First view:
Second view:
Third view:
Complete stitched images: