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參數(shù)資料
| 型號： | AK4648EC |
| 廠商： | Asahi Kasei Microsystems Co.,Ltd |
| 元件分類： | Codec |
| 英文描述： | Stereo CODEC with MIC/HP/SPK-AMP |
| 中文描述： | 立體聲編解碼器麥克風(fēng)/惠普/胰腎聯(lián)合移植腺苷 |
| 文件頁數(shù)： | 81/119頁 |
| 文件大?。?/td> | 1272K |
| 代理商： | AK4648EC |
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[AK4648]
MS0625-E-01
2007/06
- 81 -
■
Serial Control Interface
The AK4648 supports the fast-mode I
2
C-bus (max.: 400kHz). Pull-up resistors at SDA and SCL pins should be connected
to (TVDD+0.3) V or less voltage.
1. WRITE Operations
Figure 60 shows the data transfer sequence for the I
2
C-bus mode. All commands are preceded by a START condition. A
HIGH to LOW transition on the SDA line while SCL is HIGH indicates a START condition (Figure 66). After the
START condition, a slave address is sent. This address is 7 bits long followed by the eighth bit that is a data direction bit
(R/W). The most significant six bits of the slave address are fixed as “001001”. The next bit is CAD0 (device address bit).
This bit identifies the specific device on the bus. The hard-wired input pin (CAD0 pin) sets these device address bits
(Figure 61). If the slave address matches that of the AK4648, the AK4648 generates an acknowledge and the operation is
executed. The master must generate the acknowledge-related clock pulse and release the SDA line (HIGH) during the
acknowledge clock pulse (Figure 67). A R/W bit value of “1” indicates that the read operation is to be executed. A “0”
indicates that the write operation is to be executed.
The second byte consists of the control register address of the AK4648. The format is MSB first, and those most
significant 2-bits are fixed to zeros (Figure 62). The data after the second byte contains control data. The format is MSB
first, 8bits (Figure 63). The AK4648 generates an acknowledge after each byte has been received. A data transfer is
always terminated by a STOP condition generated by the master. A LOW to HIGH transition on the SDA line while SCL
is HIGH defines a STOP condition (Figure 66).
The AK4648 can perform more than one byte write operation per sequence. After receiving the third byte the AK4648
generates an acknowledge and awaits the next data. The master can transmit more than one byte instead of terminating the
write cycle after the first data byte is transferred. After receiving each data packet the internal 6-bit address counter is
incremented by one, and the next data is automatically taken into the next address. If the address exceeds 27H prior to
generating a stop condition, the address counter will “roll over” to 00H and the previous data will be overwritten.
The data on the SDA line must remain stable during the HIGH period of the clock. The HIGH or LOW state of the data
line can only change when the clock signal on the SCL line is LOW (Figure 68) except for the START and STOP
conditions.
SDA
Slave
Address
S
S
T
A
R
T
R/W="0"
A
C
K
Sub
Address(n)
A
C
K
Data(n)
A
C
K
Data(n+1)
A
C
K
A
C
K
Data(n+x)
A
C
K
P
S
T
O
P
Figure 60. Data Transfer Sequence at the I
2
C-Bus Mode
0
0
1
0
0
1
CAD0
R/W
(The CAD0 should match with CAD0 pin)
Figure 61. The First Byte
0
0
A5
A4
A3
A2
A1
A0
Figure 62. The Second Byte
D7
D6
D5
D4
D3
D2
D1
D0
Figure 63. Byte Structure after the second byte
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|---|---|
| AK4650 | 16Bit ツヒ CODEC with MIC/HP/SPK-AMP & TSC |
| AK4650VG | 16Bit ツヒ CODEC with MIC/HP/SPK-AMP & TSC |
| AK4651 | 16Bit ツヒ CODEC with MIC/HP/SPK-AMP |
| AK4651VG | 16Bit ツヒ CODEC with MIC/HP/SPK-AMP |
| AK4665A | 20-Bit Stereo CODEC with MIC/HP-AMP |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AK4649 | 制造商:AKM 制造商全稱:AKM 功能描述:24bit Stereo CODEC with MIC/SPK-AMP |
| AK4649ECB | 制造商:AKM 制造商全稱:AKM 功能描述:24bit Stereo CODEC with MIC/SPK-AMP |
| AK4649VN | 功能描述:IC CODEC AUDIO 32QFN 制造商:akm semiconductor inc. 系列:- 包裝:帶卷（TR） 零件狀態(tài):初步 類型:音頻 數(shù)據(jù)接口:I2C 分辨率（位）:24 b ADC/DAC 數(shù):1 / 1 三角積分:- 信噪比，ADC/DAC（db）（典型值）:- 動態(tài)范圍，ADC/DAC（db）（典型值）:- 電壓 - 電源，模擬:3 V ~ 3.6 V 電壓 - 電源，數(shù)字:3 V ~ 3.6 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:32-WFQFN 裸露焊盤 供應(yīng)商器件封裝:32-QFN（5x5） 標(biāo)準(zhǔn)包裝:1,000 |
| AK4650 | 制造商:AKM 制造商全稱:AKM 功能描述:16Bit ツヒ CODEC with MIC/HP/SPK-AMP & TSC |
| AK4650VG | 制造商:AKM 制造商全稱:AKM 功能描述:16Bit ツヒ CODEC with MIC/HP/SPK-AMP & TSC |
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