參數(shù)資料
型號(hào)： UDA1326PS
廠商： NXP Semiconductors N.V.
元件分類： Codec
英文描述： USB AUDIO-CODEC(通用串行總線音頻編解碼器)
中文描述： USB音頻編解碼器（通用串行總線音頻編解碼器）
文件頁數(shù)： 14/43頁
文件大?。?/td> 678K
代理商： UDA1326PS
Philips
Semiconductors, Inc.
USB-CODEC UDA1325PS
Technical Report
DML98022
2.1.3 Six-pins I/O configurations
14
The pin-assigments in the 6-pins I/O configuration are listed in the table below:
Table 2-4
6-pins Digital I/O communication
Pin
GP I/O
Pin
I/O Expander
GP5 WS input
P0
Connect / Disconnect
(2)
HID input 4
(5)
HID input 5
(5)
HID input 6
(5)
GP4 BCK output
P1
GP3 WS output
P2
GP2 DATA output
P3
GP1 DATA input
P4
Output pin 1
GP0 BCK input
P5
Output pin 2
P6
Selector output
Mute or standby output
(3) (4)
P7
Notes:
(1) All input pins must be defined at a certain voltage level by means of pull-up resistors or pull-down resistors.
(2) Connect / Disconnect: Holds the USB disconnected as long as the initialization is not finished.
(3) Standby is Switched on (output becomes LOW) if the mute is active for 2 minutes programmable time.
(4) Mute is switched on (output becomes LOW) if the isochronous data flow is interrupted.
(5) For selection of HID application see HID report descriptors in
UniCoDes
.
(6) For the I2C expander, the PCF8574P Remote 8 bit I/O expander for I2C-bus can be used.
As we can see in the table above, we have shifted the Disconnect/Connect function from GP5 to the expander
pin P0. Please read chapter 7 how to implement 6-pins Digital I/O.The main difference with the previous I/O
configurations, is the fact that the I2S output is totally seperated from the I2S input. This mode opens the
possibility to implement a DSP unit between these two general purpose pins. This way you can manipulate the
I2S data and send it back to the ADAC of the UDA1325PS like illustrated in figure 2-7:
Figure 2-7
Example for purpose of the 4-pins & 6-pins I/O configuration.
UDA1325x
USB - Bus
Speaker
HOST
Amplifier
DSP
CODEC - I2S out
CODEC - I2S in
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