參數(shù)資料
型號: CXD2721Q-1
廠商: Sony Corporation
元件分類: 數(shù)字信號處理
英文描述: Single-Chip Digital Signal Processor for Karaoke
中文描述: 單芯片數(shù)字信號處理器的卡拉OK
文件頁數(shù): 13/70頁
文件大?。?/td> 941K
代理商: CXD2721Q-1
– 13 –
CXD2721Q-1
Description of Functions
1. Master/Slave Modes
[Relevant pins] XMST, LRCK, BCK
When connecting multiple CXD2721Q-1 or when using this LSI as a pair with a DA converter such as the
CXD2558M, one of the CXD2721Q-1 should be set to master mode to supply LRCK and BCK.
The clock applied to LRCK and BCK in slave mode must be synchronized to either the crystal oscillator clock
of the XTLI and XTLO pins or the external clock input from the XTLI pin.
XMST
H
L
Slave mode
Master mode
Input
Output
Mode
LRCK, BCK I/O
2. Master Clock System
[Relevant pins] XTLI, XTLO, BFOT, BSL1, BSL2
768fs (fs = 44.1kHz) is assumed for the master clock system and the connection is as shown below. BFOT
outputs the clock obtained by frequency dividing the master clock. The frequency division ratio can be changed
by BSL1 and BSL2.
Table 1-1. LRCK, BCK Mode Setting
BSL2
0
0
1
1
0
1
0
1
384fs
768fs
256fs
512fs
BSL1
BFOT
(1) Master
512fs
XTLO
Frequency
divider
XTLI
BFOT
256fs/384fs/512fs/768fs
768fs
O
I
O
I
I
BSL1
BSL2
(2) Slave
512fs
XTLO
XTLI
O
I
768fs
OPEN
Frequency
divider
Fig. 2-1.
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