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參數(shù)資料
| 型號： | SAA2520 |
| 廠商： | NXP Semiconductors N.V. |
| 元件分類： | Codec |
| 英文描述： | Stereo filter and codec for MPEG layer 1 audio applications |
| 中文描述： | 過濾器和立體聲的MPEG編解碼器1層音頻應(yīng)用 |
| 文件頁數(shù)： | 21/36頁 |
| 文件大小： | 151K |
| 代理商： | SAA2520 |
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August 1993
21
Philips Semiconductors
Preliminary specification
Stereo filter and codec for MPEG layer 1
audio applications
SAA2520
Microcontroller interface
The SAA2520 has an interface connection to the serial interface of a microcontroller. The following signals are used:
LTCLK
LTDATA
LTCNT0
LTCNT1
LTENA
input
bi-directional
input
input
input
bit clock
serial data
control line 0
control line 1
enable
The SAA2520 microcontroller interface is enabled only if
LTENA (pin 34) is logic 1. Information to or from the
SAA2520 is conveyed in serial 8 or 16-bit units, whilst the
type of information is controlled by LTCNT0 (pin 35) and
LTCNT1 (pin 36).
A transfer commences when the microcontroller sets the
control lines to the correct combination for the required
action. LTENA is set to logic 1. The SAA2520 determines
its required action and prepares to transfer data. When the
microcontroller supplies the LTCLK, data is transferred to
or from the SAA2520 in units of 8-bits. 16-bit transfers are
conveyed as two 8-bit units during which LTENA remains
high.
During the transfer of 8-bit units, the least significant bit is
first to be transferred. When 16-bit units are transferred the
most significant byte is sent first.
E
XTENDED
S
ETTINGS
(LTCNT1 = 0, LTCNT0 = 0)
Four information bits together with four address bits are
transferred in this mode. The order in which the bits appear
on the interface is:
D0..D1..D2..D3..A0..A1..A2..A3
Table 4
Extended Settings.
Table 5
Extended Settings.
Note
If not used for DAC control, the MUTEDAC, ATTDAC and DEEMDAC can be used as general purpose output expanders.
BIT
A3
BIT
A2
BIT
A1
BIT
A0
DESCRIPTION
0
0
0
..
1
0
0
0
..
1
0
0
1
..
1
0
1
0
..
1
CODEC external settings (see Table 5)
FILTER settings (see note 1)
not used
..
not used
BIT
DESIGNATION
DEFAULT
FUNCTION
D0
D1
D2
D3
MUTEDAC
ATTDAC
DEEMDAC
HOLDCLKOK
1
0
0
0
connected to DAC mute input
connected to DAC attenuation input
emphasis control for DAC circuit
selects CLKOK hold mode
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| SAA3004 | Remote control transmitter |
| SAA3004P | Remote control transmitter |
| SAA3004T | Remote control transmitter |
| SAA3007 | INFRARED REMOTE CONTROL TRANSMITTER (LOW VOLTAGE) |
| SAA3007P | INFRARED REMOTE CONTROL TRANSMITTER (LOW VOLTAGE) |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| SAA2520GP | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Stereo filter and codec for MPEG layer 1 audio applications |
| SAA2521 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Masking threshold processor for MPEG layer 1 audio compression applications |
| SAA2521GP | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Masking threshold processor for MPEG layer 1 audio compression applications |
| SAA2531DEB | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Optoelectronic |
| SA-A2870-FREQ | 制造商:NEL 制造商全稱:Nel Frequency Controls,inc 功能描述:Differential Positive ECL (DPECL) |
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