Low-power IoT Connectivity IP Design Based on FDSOI...NB-IoT System Digital Baseband IP based on...
Transcript of Low-power IoT Connectivity IP Design Based on FDSOI...NB-IoT System Digital Baseband IP based on...
Low-power IoT Connectivity IP Design Based on FDSOI
Yi Zeng
Verisilicon IoT Connectivity Dept
2019 Sept
Current Progress of IoT Industry ▲ IoT applications grow fast
► In multiple scenarios: Smart Home, Smart City
► With large number and high density
Company Proprietary and Confidential IoT Infrastructure
IoT Nodes IoT Gateways Networking Cloud servers Applications
▲ IoT network deployment is slowing down
► Reuse existing Wi-Fi APs
► BLE Mesh networking is emerging
► NB-IoT: reuse existing 4G cellular network
► LoRa networking for long-range local connection
Current IoT device chips
▲ IoT chip price is pushed down rapidly
► Chip cost is close to or lower than 1$
► Not driven by technology, but squeezed by market
► homogeneity competition, little differentiation
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1$
2016 2017 2018 2019 2020
IoT chip cost NB-IoT
LoRa
BTDM
▲Power dissipation keeps almost unchanged
► Require 2 AA batteries, large form size
► Process node is stagnating at 55/40nm
► Reuse existing blocks: ARM core, GSM RF, etc.
► Performance is not as good as expected
Current IoT Networking
▲ IoT networking becomes more expensive
► CAPEX/OPEX increases, when number of IoT devices becomes large
Cellular network structure is designed for human networking
‐ Limited capacity
LoRa is designed for point-2-point communication
▲Value of “IoT Data” is not generated
► Data is collected, not analyzed
► Data is separated, not synthesized
▲Require new architecture with AI
► AI at edge to preprocess raw data to lower networking capacity
requirement
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Typical cellular networking load curves
Requiring Technical Innovations for IoT
▲Hardware platform based on innovative IPs
► Fundamental Innovations for building blocks
Utilize advanced process node for PPA improving
Drive upgrading in system architecture, product form factor etc.
►Platformazation with service
Lower technical/finacial entry bar
Enable differentiation by customization
▲Software platform based on Open Source
► Flexible for misc scenarios
►Adaptive networking structure
►Mine the value of “IoT Big Data”
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RF IP Repository
Data
Digital HW and Firmware
Ctrl i/f
Sensor IPs
SW Resources: OS, Protocol stack, Security …..
Scenarios
Apps
Platform
IP AI HW Engines
AI Algorithms
VSI IoT Connectivity IPs ▲Target Multiple IoT Connectivity Technologies
►NB-IoT System
Digital Baseband IP based on ZSPNano core
RF IP on FDSOI22
‐ Transceiver is verified on test chip
‐ DPA+ADPLL is to be tested
►BLE5.0 System
RF IP on FDSOI22 with silicon proven
LL IP with BQB certification
►GNSS RF IP
Multi-mode RF IP is being developed on FDSOI22
► Sub-1GHz Customizing connectivity system
Customized solutions for specific scenarios
ZSPnano core subsystem
NB-IoT Protocol
Stack
NB-IoT PHY FW
BLE LL FW & stack SW
Trace&debug tool RTOS
BLE RF Sub1G
Customized RF
Digital HW
NB-IoT RF
Digital HW
GNSS RF
Digital HW Digital HW IPs
System
Platform
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Bottom-up: From Process to System
FDSOI
RF Characteristic Advantages
Low Voltage Digital Circuit
Back-gate Biasing
Process Characteristics
Circuit Design SoC Architecting
Power Management Unit
RF Transceiver &
Analog/Mixed Signal
DSP/AP/Baseband “Always On”
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BLE IP
VSI BLE5 System
▲Complete BLE solution for an SoC integration
▲Verified with multiple RF test chips
▲High reliability with BQB certification
BLE Stack
Demodulator
BLE RF
HCI I/F
ZSPnano Core
ACC1
ACC2
ACC3
BLE RF Board
BLE Link Layer System on ZSPnano
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BLE RF IP
▲Completeness
►Self contained IP system
Transceiver + Digital Demodulator
Auxiliary blocks
Clock ,POR, ADC
Integrating BALUN and switch
►Dedicated PMU IP for large range of supply voltage
▲Low Power Optimization
►Core voltage is lowered to 0.8v
►Multiple power saving modes
Separated power management for TX/RX
►Dedicated LPLDO for deep sleep mode
For “always on” block in SoC
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BLE RF Advantages
Area
55nm bulk CMOS
VSI BLE @FDSOI22
40%
Power
55nm bulk CMOS
VSI BLE @FDSOI22
30%
Performance (RX sensitivity)
Market Average
VSI BLE @FDSOI22
>5dB
High-Integration – High-performance – Low-power – Small-area
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BLE Link Layer
Link layer with BQB Certified
▲BLE Link-layer Subsystem
► FW implementation on ZSPnano core
Low power core
Flexible packet scheduling
Support feature upgrading and extending by software update
►HW framework
Real-time RF control I/F
Memory management
Encryption engine
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NB-IoT IP
VSI NB-IoT System Overview
SPI UART I2C
Serial Flash
SIM Card
Xstal Integrated PMIC: Buck, LDOs
3GPP NB-IoT PHY & protocol stack
RF Transceiver
PA
TX
RX
Antenna
Switch
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▲NB-IoT Platform
►Complete modem system
Conform with 3GPP R13 NB-IoT standards
Protocol stack software is ported and integrated
►PMIC
DCDC and LDOs included
LPLDO for deep sleep mode
32K and 26M Xtals are integrated
NB-IoT RF IP
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▲Architecture optimizing with FDSOI process
► Low IF/zero IF configurable RX architecture
► 26MHz DCXO/VCTCXO support high accuracy AFC
► RFPLL covers both HB and LB
► I/Q modulation TX supports LB and integrates BALUN
► 0.8V core voltage
► Silicon proven on FDSOI22
NB-IoT Digital BB IP
▲Single core BB based on ZSPNano core
►Low power low cost core architecture
ISA for both control and signal processing
High code density to save Ins memory
Integrate PS SW and PHY on FreeRTOS
►Whole system integration and verification
Hardware coprocessors/Accs integrated
Co-design with RF
NB-IoT all functionalities validation
►Power consumption Test
Core voltage can be lowered
Leakage optimization by body-biasing
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GNSS
VSI GNSS RF IP
▲Low Power GNSS RF IP on GF22FDX
►Dual band supported:
GPS L1, Beidou B1, Galileo E1 and Glonass G1; L5 bands configurable
► Fully integrated PLL synthesizer, VCO & loop filter
►Highly integrated LNA, Power Manager
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