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EnglishInternet-of-Things devices need sensors with low power footprint and capable of producing semantically rich data. Promising candidates are spiking sensors that use asynchronous Address-Event Representation (AER) carrying information within inter-spike times. To minimize the overhead of coupling AER sensors with off-The-shelf microcontrollers, we propose an FPGA-based methodology that i) tags the AER spikes with timestamps to make them carriable by standard interfaces (e.g. I2S, SPI); ii) uses a recursively divided clock generated on-chip by a pausable ring-oscillator, to reduce power while keeping accuracy above 97% on timestamps. We prototyped our methodology on a IGLOOnano AGLN250 FPGA, consuming less than 4.5mW under a 550kevt/s spike rate (i.e. a noisy environment), and down to 50uW in absence of spikes.
| Titolo: | An Ultra-Low Power Address-Event Sensor Interface for Energy-Proportional Time-To-Information Extraction | |
| Autore/i: | Di Mauro, Alfio; Conti, Francesco; Benini, Luca | |
| Autore/i Unibo: | ||
| Anno: | 2017 | |
| Titolo del libro: | Proceedings - Design Automation Conference | |
| Pagina iniziale: | 1 | |
| Pagina finale: | 6 | |
| Digital Object Identifier (DOI): | http://dx.doi.org/10.1145/3061639.3062201 | |
| Abstract: | Internet-of-Things devices need sensors with low power footprint and capable of producing semantically rich data. Promising candidates are spiking sensors that use asynchronous Address-Event Representation (AER) carrying information within inter-spike times. To minimize the overhead of coupling AER sensors with off-The-shelf microcontrollers, we propose an FPGA-based methodology that i) tags the AER spikes with timestamps to make them carriable by standard interfaces (e.g. I2S, SPI); ii) uses a recursively divided clock generated on-chip by a pausable ring-oscillator, to reduce power while keeping accuracy above 97% on timestamps. We prototyped our methodology on a IGLOOnano AGLN250 FPGA, consuming less than 4.5mW under a 550kevt/s spike rate (i.e. a noisy environment), and down to 50uW in absence of spikes. | |
| Data stato definitivo: | 11-dic-2017 | |
| Appare nelle tipologie: | 4.01 Contributo in Atti di convegno |
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http://hdl.handle.net/11585/613494
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