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參數(shù)資料
| 型號： | 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 |
| 文件頁數(shù)： | 9/52頁 |
| 文件大?。?/td> | 310K |
| 代理商： | UDA1325 |
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1999 May 10
9
Philips Semiconductors
Preliminary specification
Universal Serial Bus (USB) CODEC
UDA1325
Fig.3 Pin configuration (SDIP42 package).
handbook, halfpage
UDA1325
MGM106
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VSSA3
XTAL1a
XTAL2a
VDDA3
VRP
VRN
VINR
VSSA2
VINL
VDDA2
Vref(AD)
Vref(DA)
VSSA1
VDDA1
VOUTR
RTCB
TC
VOUTL
VSSO
VDDO
VDDX
DA
WS
BCK
GP2/DO
GP3/WSO
GP4/BCKO
SHTCB
D
D
+
VDDI
VSSI
VSSE
VDDE
GP1/DI
GP5/WSI
GP0/BCKI
SCL
SDA
VSSX
XTAL1b
XTAL2b
FUNCTIONAL DESCRIPTION
The Universal Serial Bus (USB)
Data and power is transferred via the USB over a 4-wire
cable. The signalling occurs over two wires and
point-to-point segments. The signals on each segment are
differentially driven into a cable of 90
intrinsic
impedance. The differential receiver features input
sensitivity of at least 200 mV and sufficient common mode
rejection.
The analog front-end
The analog front-end is an on-chip generic USB
transceiver. It is designed to allow voltage levels up to V
DD
from standard or programmable logic to interface with the
physical layer of the USB. It is capable of receiving and
transmitting serial data at full speed (12 Mbits/s).
The USB processor
The USB processor forms the interface between the
analog front-end, the ADIF, the ADAC and the
microcontroller. The USB processor consists of:
A bit clock recovery circuit
The Philips Serial Interface Engine (PSIE)
The Memory Management Unit (MMU)
The Audio Sample Redistribution (ASR) module.
Bit clock recovery
The bit clock recovery circuit recovers the clock from the
incoming USB data stream using four times over-sampling
principle. It is able to track jitter and frequency drift
specified by the USB specification.
Philips Serial Interface Engine (PSIE)
The Philips SIE implements the full USB protocol layer.
It translates the electrical USB signals into data bytes and
control signals. Depending upon the USB device address
and the USB endpoint address, the USB data is directed
to the correct endpoint buffer. The data transfer could be
of bulk, isochronous, control or interrupt type.
The functions of the PSIE include: synchronization pattern
recognition, parallel/serial conversion, bit
stuffing/de-stuffing, CRC checking/generation, PID
verification/generation, address recognition and
handshake evaluation/generation.
The amount of bytes/packet on all endpoints is limited by
the PSIE hardware to 8 bytes/packet, except for both
isochronous endpoints (336 bytes/packet).
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| UDA1325H | Universal Serial Bus USB CODEC |
| UDA1325PS | Universal Serial Bus USB CODEC |
| UDA1326PS | USB AUDIO-CODEC(通用串行總線音頻編解碼器) |
| UDA1331H | Universal Serial Bus USB Audio Playback Peripheral APP |
| UDA1334BT | Low power audio DAC |
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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