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參數(shù)資料
| 型號(hào)： | AK7714 |
| 廠商： | Asahi Kasei Microsystems Co.,Ltd |
| 元件分類： | 圓形連接器 |
| 英文描述： | Circular Connector; No. of Contacts:8; Series:MS27484; Body Material:Aluminum; Connecting Termination:Crimp; Connector Shell Size:16; Circular Contact Gender:Socket; Circular Shell Style:Straight Plug; Insert Arrangement:16-8 RoHS Compliant: No |
| 中文描述： | 20位音頻編解碼器與DSP和內(nèi)存延遲 |
| 文件頁數(shù)： | 25/48頁 |
| 文件大?。?/td> | 516K |
| 代理商： | AK7714 |
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[ASAHI KASEI]
[AK7714]
M0018-E-00
‘98/07
- 25 -
(3) Resetting
The AK7714 has three reset pins: INIT RESET,DSP RESET and CODEC RESET.
The INIT RESET pin is used to initialize the AK7714, as shown in "Power supply startup sequence above."
DSP RESET and CODEC RESET are normally controlled simultaneously. The system is reset when
DSP RESET = "L" and CODEC RESET = "L". (Description of "reset" is for "system reset".)
Under the condition of this system reset, the program write operation is performed (except for write operation during
running).
During the system reset phase, the ADC and DAC sections are also reset. (The digital section of ADC output is MSB
first 00000h and the analog section of DAC output is Hi-z. )
CLKO is output even during the system reset phase if CTRL (1:0) = 0h (Mode 1), but LRCLK and BITCLK in the master
mode will stop.
The system reset is released by setting either DSP RESET or CODEC RESET to "H", and this will activate the internal
counter. LRCLK and BITCLK in the master mode are generated by this counter: however, a hazard may occur when a
clock signal is generated. When the system reset is released in the slave mode, internal timing will be actuated in
synchronization with "
↑
" of LRCLK (when the standard input format is used). Timing between the external and internal
clocks is adjusted at this time. If the phase difference in LRCLK and internal timing is within about -1/16 to 1/16 of the
input sampling cycle (1/fs) during the operation, the operation is performed with internal timing remaining unchanged. If
the phase difference exceeds the above range, the phase is adjusted by synchronization with "
↑
" of LRCLK (when the
standard input format is used). This is a circuit to prevent failure of synchronization with the external circuit owing to
noise and the like. For some time after returning to the normal state after loss of synchronization, normal data will not
be output. If you want to change the clock, do so while the system is reset.
The ADC section can output 516-LRCLK after its internal counter started. (The internal counter starts at the first rising
edge of LRCLK at master mode. In case of slave mode, it starts end of 2LRCLK after release of system reset. )
The AK7714 performs normal operation when both DSP RESET and CODEC RESET are set to "H".
(4) System clock
The required system clock is XTI (256 fs/384 fs/512 fs), LRCLK (fs) and BITCLK (64 fs) in the slave mode, and is XTI
(256 fs/384 fs/512 fs) in the master mode.
LRCLK corresponds to the standard digital audio rate (32 kHz, 44.1 kHz, 48 kHz).
fs
XTI
256 fs
- Note
(Master clock)
384 fs
12.2880 MHz
16.9344 MHz
18.4320 MHz
BITCLK
64 fs
2.0480 MHz
2.8224 MHz
3.0720 MHz
512 fs
32.0 kHz
44.1 kHz
48.0 kHz
Note: 256 fs is not supported at fs = 32.0 kHz. 512fs is not supported at fs = 48.0 kHz.
16.3840 MHz
22.5792 MHz
- Note
11.2896 MHz
12.2880 MHz
SMODE
L
L
L
H
H
H
CKS1
L
L
H
L
L
H
CKS0
L
H
L
L
H
L
XTI
384 fs
512 fs
256 fs
384 fs
512 fs
256 fs
LRCLK, BITCLK
Input
Input
Input
Output
Output
Output
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| AK7714VT | Circular Connector; No. of Contacts:8; Series:MS27484; Body Material:Aluminum; Connecting Termination:Crimp; Connector Shell Size:16; Circular Contact Gender:Socket; Circular Shell Style:Straight Plug; Insert Arrangement:16-8 RoHS Compliant: No |
| AK7730A | JT 23C 21#20 2#16 SKT GRND |
| AK8414 | AK8414 |
| AK8430 | JT 11C 11#16 SKT PLUG |
| AK8811 | NTSC/PAL Digital Video Encoder |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AK7714VT | 制造商:AKM 制造商全稱:AKM 功能描述:20-Bit Audio Codec with DSP and Delay RAM |
| AK7716VT | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Consumer IC |
| AK7719 | 制造商:AKM 制造商全稱:AKM 功能描述:Low Power DSP for Voice and Audio Processing |
| AK7719B | 制造商:AKM 制造商全稱:AKM 功能描述:Low Power DSP for Voice and Audio Processing |
| AK7719BECB | 制造商:AKM 制造商全稱:AKM 功能描述:Low Power DSP for Voice and Audio Processing |
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