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參數(shù)資料
型號(hào)： UDA1325
廠商： NXP Semiconductors N.V.
元件分類： Codec
英文描述： Universal Serial Bus USB CODEC
中文描述： 通用串行總線解碼器
文件頁(yè)數(shù)： 13/52頁(yè)
文件大?。?/td> 310K
代理商： UDA1325
1999 May 10
13
Philips Semiconductors
Preliminary specification
Universal Serial Bus (USB) CODEC
UDA1325
USB ENDPOINT DESCRIPTION
The UDA1325 has following six endpoints:
USB control endpoint 0
USB control endpoint 1
USB status interrupt endpoint 1
USB status interrupt endpoint 2
Isochronous data sink endpoint
Isochronous data source endpoint.
Table 5
Endpoint description
CONTROLLING THE PLAYBACK FEATURES
Controlling the playback features of the ADAC
The exchange of control information between the microcontroller and the ADAC is accomplished through a serial
hardware interface comprising the following pins:
L3_DATA: microcontroller interface data line
L3_MODE: microcontroller interface mode line
L3_CLK: microcontroller interface clock line.
See also the description of Port 3 of the 80C51 microcontroller.
Information transfer through the microcontroller bus is organized in accordance with the so-called ‘L3’ format, in which
two different modes of operation can be distinguished; address mode and data transfer mode.
The address mode is required to select a device communicating via the L3-bus and to define the destination registers
for the data transfer mode. Data transfer for the UDA1325 can only be in one direction, from microcontroller to ADAC to
program its sound processing features and other functional features.
A
DDRESS MODE
The address mode is used to select a device (in this case the ADAC) for subsequent data transfer and to define the
destination registers. The address mode is characterized by L3_MODE being LOW and a burst of 8 pulses on L3_CLK,
accompanied by 8 data bits on L3_DATA. Data bits 0 and 1 indicate the type of the subsequent data transfer as shown
in Table 6.
ENDPOINT
NUMBER
ENDPOINT
INDEX
ENDPOINT TYPE
DIRECTION
MAX. PACKET
SIZE (BYTES)
0
0
1
2
3
4
5
6
7
control (default)
out
in
out
in
in
in
out
in
8
8
8
8
8
8
336
336
1
control
2
3
4
5
interrupt
interrupt
isochronous out
isochronous in
相關(guān)PDF資料
PDF描述
UDA1325H Universal Serial Bus USB CODEC
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UDA1326PS USB AUDIO-CODEC(通用串行總線音頻編解碼器)
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
UDA1325H 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Universal Serial Bus USB CODEC
UDA1325PS 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Universal Serial Bus USB CODEC
UDA1328 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Multi-channel filter DAC
UDA1328T 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Multi-channel filter DAC
UDA1330A 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Low-cost stereo filter DAC
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