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參數(shù)資料
| 型號： | 0W888-002-XTP |
| 廠商： | ON SEMICONDUCTOR |
| 元件分類： | 數(shù)字信號處理 |
| 英文描述： | BelaSigna 250 - 16 bit Audio Processor, Full Stereo 2-in, 2-out; Package: LFBGA 64, 7x7; No of Pins: 64; Container: Tape and Reel; Qty per Container: 1500 |
| 中文描述： | 0-BIT, 50 MHz, MIXED DSP, PBGA64 |
| 封裝： | 7 X 7 MM, GREEN, LFBGA-64 |
| 文件頁數(shù)： | 16/34頁 |
| 文件大?。?/td> | 935K |
| 代理商： | 0W888-002-XTP |
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Rev. 7 | Page 23 of 34 | www.onsemi.com
BelaSigna 250
Figure 13: Power Management
3.7 Other Analog Support Blocks and Functions
3.7.1. Multi-Chip Sample Clock (MCLK) Synchronization
BelaSigna 250 allows MCLK synchronization between two or more BelaSigna 250 devices connected in a multi-chip configuration.
Samples on multiple chips will synchronize to occur at the same instant in time. This is useful in applications using microphone arrays
where synchronous sampling is required. The sample clock synchronization is enabled using a control bit and a GPIO assignment that
brings all MCLKs across chips to zero phase at the same instant in time.
3.7.2. Low-Speed A/D Converters (LSAD)
Six LSAD inputs are available on BelaSigna 250. Combined with two internal LSAD inputs (supply and ground), there are a total of
eight multiplexed inputs to the LSAD converter. The multiplexed inputs are sampled sequentially at 1.6kHz per channel when operating
at MCLK of 1.28MHz (proportionally). The native data format for the LSAD is 10-bit two's-complement. However, a total of eight
operation modes are provided that allow a configurable input dynamic range in cases where certain minimum and maximum values for
the converted inputs are desired, such as in the case of a volume control where only input values up to a certain magnitude are
allowed. The six LSAD pads are multiplexed with other functionality.
3.7.3. Battery Monitor
A programmable on-chip battery monitor is available for power management. The battery monitor works by incrementing a counter
value every time the battery voltage goes below a desired, configurable threshold value. This counter value can be used in an
application-specific power-management algorithm running on the RCore. The RCore can initiate any desired actions in case the battery
hits a predetermined value. This function is realized with an internal LSAD tied directly to the power supply.
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