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| 型號： | SAA7826 |
| 廠商： | NXP Semiconductors N.V. |
| 英文描述： | CD audio decoder, digital servo and filterless DAC with integrated pre-amp and laser control |
| 中文描述： | CD音頻解碼器，數(shù)字伺服和濾波器DAC，具有集成前置放大器和激光控制 |
| 文件頁數(shù)： | 39/89頁 |
| 文件大?。?/td> | 379K |
| 代理商： | SAA7826 |
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2003 Oct 01
39
Philips Semiconductors
Product specification
CD audio decoder, digital servo and filterless
DAC with integrated pre-amp and laser control
SAA7826
7.17.1.7
Write servo commands
A write data command is used to transfer data (a number
of bytes) from the microcontroller, using the protocol
illustrated in Fig.31. The first of these bytes is the
command byte and the following are data bytes; the
number (between 1 and 7) depends on the command
byte.
It should be noted that RAB must be held LOW; the
command or data is interpreted by the SAA7826 after the
HIGH-to-LOW transition of SILD; there must be a
minimum time of 70
μ
s between SILD pulses.
7.17.1.8
Writing repeated data in servo commands
The same data byte can be repeated by applying extra
SILD pulses as illustrated in Fig.32. SCL must be HIGH
between the SILD pulses.
7.17.1.9
Read servo commands
A read data command is used to transfer data (status
information) to the microcontroller, using the protocol
shown in Fig.33. The first byte written determines the type
ofcommand.Afterthisbyteavariablenumberofbytescan
be read. It should be noted that RAB must be held LOW;
after the end of the command byte (LOW-to-HIGH
transition on SILD) there must be a delay of 70
μ
s before
data can be read (i.e. the next HIGH-to-LOW transition on
SILD)andtheremustbeaminimumtimeof70
μ
sbetween
SILD pulses.
7.17.2
M
ICROCONTROLLER INTERFACE
(I
2
C-
BUS MODE
)
Bytes are transferred over the interface in groups (i.e.
servo commands) of which there are two types: write data
commands and read data commands.
The sequence for a write data command (that requires
3 data bytes) is as follows:
1.
Send START condition.
2.
Send address 30H (write).
3.
Write command byte.
4.
Write data byte 1.
5.
Write data byte 2.
6.
Write data byte 3.
7.
Send STOP condition.
It should be noted that more than one command can be
sent in one write sequence.
The sequence for a read data command (that reads 2 data
bytes) is as follows:
1.
Send START condition.
2.
Send address 30H (write).
3.
Write command byte.
4.
Send STOP condition.
5.
Send START condition.
6.
Send address 31H (read).
7.
Read data byte 1.
8.
Read data byte 2.
9.
Send STOP condition.
It should be noted that the timing constraints specified for
the read and write servo commands must still be adhered
to.
handbook, full pagewidth
A3
A2
A1
A0
D3
D2
D1
D0
SDA
(SAA782X)
SCL
(microcontroller)
RAB
SDA
(microcontroller)
MBL445
high-impedance
Fig.25 Microcontroller write protocol for registers 0 to F.
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| SAA7826HL | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:CD audio decoder, digital servo and filterless DAC with integrated pre-amp and laser control |
| SAA7826HL/E/M1A | 功能描述:音頻數(shù)/模轉換器 IC PHONIC AUTO RoHS:否 制造商:Texas Instruments 轉換器數(shù)量: 分辨率:16 bit 接口類型:I2S, UBS 轉換速率: 信噪比:98 dB 工作電源電壓:5 V DAC 輸出端數(shù)量:2 工作溫度范圍:- 25 C to + 85 C 電源電流:23 mA 安裝風格:SMD/SMT 封裝 / 箱體:TQFP-32 封裝:Reel |
| SAA7826HL/E/M1A,55 | 功能描述:音頻數(shù)/模轉換器 IC PHONIC AUTO RoHS:否 制造商:Texas Instruments 轉換器數(shù)量: 分辨率:16 bit 接口類型:I2S, UBS 轉換速率: 信噪比:98 dB 工作電源電壓:5 V DAC 輸出端數(shù)量:2 工作溫度范圍:- 25 C to + 85 C 電源電流:23 mA 安裝風格:SMD/SMT 封裝 / 箱體:TQFP-32 封裝:Reel |
| SAA7826HL/M1A | 功能描述:音頻數(shù)/模轉換器 IC PHONIC AUTO RoHS:否 制造商:Texas Instruments 轉換器數(shù)量: 分辨率:16 bit 接口類型:I2S, UBS 轉換速率: 信噪比:98 dB 工作電源電壓:5 V DAC 輸出端數(shù)量:2 工作溫度范圍:- 25 C to + 85 C 電源電流:23 mA 安裝風格:SMD/SMT 封裝 / 箱體:TQFP-32 封裝:Reel |
| SAA7826HL/M1A,557 | 功能描述:音頻數(shù)/模轉換器 IC PHONIC AUTO RoHS:否 制造商:Texas Instruments 轉換器數(shù)量: 分辨率:16 bit 接口類型:I2S, UBS 轉換速率: 信噪比:98 dB 工作電源電壓:5 V DAC 輸出端數(shù)量:2 工作溫度范圍:- 25 C to + 85 C 電源電流:23 mA 安裝風格:SMD/SMT 封裝 / 箱體:TQFP-32 封裝:Reel |
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