Sensors & Transducers | |
AHB-Compliant Bridge with Programmable Frequency Downscaling for Efficient off Chip Digital Communication of Pin-limited Automotive Smart IC Sensors | |
Luca Fanucci1  Sergio Saponara1  Tommaso Cecchini1  Francesco Sechi1  | |
[1] Department of Information Engineering, University of Pisa Pisa, Italy; | |
关键词: Automotive acquisition units; Mixed-signal circuits; Bridge; Pin-limited devices; Smart IC sensors; Bi‑synchronous FIFO; Intellectual Property (IP) macrocells; | |
DOI : | |
来源: DOAJ |
【 摘 要 】
Modern automotive electronic systems are based on distributed nets of smart IC sensors, typically implemented as mixed-signal ASICs. Beside the sensing device also the analog front-end, the A/D converter and some DSP processing tasks are integrated in a single-chip. A key issue for these micro-systems is a cost-effective communication with the off-chip Electronic Control Unit (ECU) for correct managing of relative actuators. Due to the limited amount of space and to reduce costs, automotive sensor chips are often pin-limited. An efficient communication between the IC and off-chip devices can be implemented by an internal bus re-mapping on a low-frequency pin-limited external bus. This article presents the complete design of an IP bridge and its implementation in a real smart sensor system on BCD technology. The IP bridge is based on bi-synchronous FIFO structures for frequency conversion and involves a custom protocol for cost-effective data transmission on a low frequency and low width bus.
【 授权许可】
Unknown