PC805: EMPOWERING A NEW ERA
PC805 5G Small Cell RU SoC
The PC805 is a purpose-designed PHY SoC for 5GNR/LTE small cell O-RU RAN architectures, and meets industry-leading Open RAN specifications. The PC805 interfaces with an O-DU as part of an Open RAN split 7.2, via an Open Fronthaul eCPRI interface and supports seamless connections to RFICs with a standardised JESD204B high-speed serial interface. The PC805 does not require an external processor/controller for configuration or management. This is all done via an integrated RISC-V based Management processor running a Linux OS.
Key Applications
The PC805 SoC is designed for 5G and LTE small cell O-RU platforms in the following network deployments:
- Indoor residential, enterprise and industrial
- Neutral host and private
- Outdoor
The PC805 can be used for either of the following architectures:
- Split 7.2x O-RAN Radio Unit (O-RU CAT-A)
- Split 8 Remote Radio Heads (RRH or RRU)*
* note the PC805C variant can be used exclusively for split 8
Key Features
- Picocom’s 5GNR and LTE low PHY software
- O-RAN eCPRI Open Fronthaul interface
- On-chip supervisor Linux CPU for M-plane, S-plane processing, and radio control
- Fourier transforms: FFT, iFFT
- Digital Front End (DFE)
- Digital Pre-Distortion (DPD)
- Crest Factor Reduction (CFR)
- Simple cascade mode for eCPRI use cases
- PRACH processing
- IQ compression/decompression
- Secure on-chip boot capability
- Debug and device monitoring
Key Interfaces
- High speed 4-lane JESD204B radio interface
- 10/25Gbps eCPRI Open Fronthaul including support for 10Gbase-T copper
- 10.137/12.165/24.33 Gbit/s CPRI Interface
- 2x SPI and up to 48 timed GPIO interfaces
- 2x 12C, 3x UART and 100M Ethernet Debug interfaces
- Synchronisation and clock interfaces: SyncE, IEEE1588v2 and GNSS
- LPDDR4 external RAM
- QSPI flash
Key Performance
The PC805 supports 3GPP 5GNR releases 15 and 16, with headroom for future releases.
The PC805 supports flexible RF/bandwidth mapping, for example:
- 8 TX/8 RX RF ports at 100MHz BW
- 4 TX/4 RX RF ports at 200MHz BW
- 2 TX/2 RX RF ports at 400MHz BW
The PC805 supports a wide number of use cases for multi-carrier, simultaneous dual 5GNR/LTE mode, and neutral host applications.
Please download the Product Brief to see examples on use cases.
Package summary
- 17mm x 17mm FC LFBGA Flip-Chip Ball Grid
Device description
The PC805 device’s function in a small cell use case is, at the highest level, seen as transforming O-RAN fronthaul eCPRI (or CPRI messages) from O-DU or fronthaul gateway to IQ samples for the radio, and vice versa. This includes driving the external physical and software interfaces, low PHY processing, Digital Front End (DFE), Digital Pre-Distortion (DPD) and Crest Factor Reduction (CFR) functions.
Architecture block diagram
Signal Flow Block Diagram
Simple Cascade mode for split 7.2
