Fig. 1.
A typical view of daisy-chain SPI communication interface.
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| Citation: |
Qidong Zhang, Yintang Yang, Changchun Chai. A high EMS daisy-chain SPI interface for battery monitor system[J]. Journal of Semiconductors, 2017, 38(3): 035002. doi: 10.1088/1674-4926/38/3/035002
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Q D Zhang, Y T Yang, C C Chai. A high EMS daisy-chain SPI interface for battery monitor system[J]. J. Semicond., 2017, 38(3): 035002. doi: 10.1088/1674-4926/38/3/035002.
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A high EMS daisy-chain SPI interface for battery monitor system
DOI: 10.1088/1674-4926/38/3/035002
More Information
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Abstract
A high EMS current-mode SPI interface for battery monitor IC (BMIC) is presented to form a daisy-chain bus configuration for the cascaded BMICs and the communication between the MCU and master BMIC. Based on analog and digital mixed filtering technique, the proposed daisy-chain can avoid the isolated communication issue in electromagnetic interference environment, and reduce the extensively required I/O ports of MCU, at the same time reduce the system cost. The proposed daisy-chain interface was introduced in a 6-ch battery monitor IC which was fabricated with 0.35 μm 30 V BCD process. The measurement result shows that the presented daisy-chain SPI interface achieves better EMS performance with different EMI injection while just consuming a total operation current up to 1 mA.-
Keywords:
- SPI,
- daisy-chain,
- EMS,
- EMI,
- battery monitor,
- battery management
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References
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