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參數(shù)資料
| 型號(hào)： | 0W633-001-XTP |
| 廠商： | ON SEMICONDUCTOR |
| 元件分類(lèi)： | 數(shù)字信號(hào)處理 |
| 英文描述： | BelaSigna 250 - 16 bit Audio Processor, Full Stereo 2-in, 2-out; Package: LFBGA 57, 5x5; No of Pins: 57; Container: Tape and Reel; Qty per Container: 5000 |
| 中文描述： | 0-BIT, 50 MHz, MIXED DSP, PBGA49 |
| 封裝： | 5 X 5 MM, GREEN, CABGA-49 |
| 文件頁(yè)數(shù)： | 8/34頁(yè) |
| 文件大小： | 935K |
| 代理商： | 0W633-001-XTP |
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Rev. 7 | Page 16 of 34 | www.onsemi.com
BelaSigna 250
In the case where the WOLA coprocessor and the IOP no longer work together as a result of a low battery condition, an IOP end-of-
battery-life auto-mute feature is available.
The IOP can be configured to access data in the FIFOs in four different audio modes that are shown in Figure 8.
Mono mode: Input samples are stored sequentially in the input FIFO. Output samples are stored sequentially in the output
FIFO.
Simple stereo mode: Input samples from the two channels are interleaved in the input FIFO. Output samples for the single
output channel are stored in the lower part of the output FIFO.
Digital mixed mode: Input samples from the two channels are stored in each half of the input FIFO. Output samples for the
single output channel are stored in the lower half of the output FIFO.
Full stereo mode: Input samples from the two channels are interleaved in the input FIFO. Output samples for the two output
channels are also interleaved in the output FIFO.
Figure 8: Audio Modes
3.4 Other Digital Blocks and Functions
3.4.1. RAM and ROM
There are 20-Kwords of on-chip program and data RAM on BelaSigna 250. These are divided into three entities: a 12-Kword program
memory, and two 4-Kword data memories ("X" and "Y", as are common in a dual-Harvard architecture).
There are also three RAM banks that are shared between the RCore and WOLA coprocessor. These memory banks contain the input
and output FIFOs, gain tables for the WOLA coprocessor, temporary memory for WOLA calculations, WOLA coprocessor results, and
the WOLA coprocessor microcode.
There is a 128-word lookup table (LUT) ROM that contains log2(x), 2
x, 1/x and sqrt(x) values, and a 1-Kword program ROM that is used
during booting and configuration of the system.
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