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參數(shù)資料
| 型號： | UCB1400 |
| 廠商： | NXP Semiconductors N.V. |
| 元件分類： | Codec |
| 英文描述： | Audio codec with touch screen controller and power management monitor |
| 中文描述： | 音頻編解碼器與觸摸屏控制器和電源管理監(jiān)控 |
| 文件頁數(shù)： | 16/63頁 |
| 文件大小： | 674K |
| 代理商： | UCB1400 |
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Philips Semiconductors
UCB1400
Audio codec with touch screen controller
and power management monitor
Product data
Rev. 02 — 21 June 2002
16 of 63
9397 750 09611
Koninklijke Philips Electronics N.V. 2002. All rights reserved.
8.5 Variable sample rate signaling protocol
The AC-link is defined for a fixed transfer rate of 48 kHz. To support the diverse
sample rates, UCB1400 implements the Variable Sample Rate Signaling Protocol of
the AC ’97 Component Specification
To control the AC ’97 Controller to input a rate other than 48 kHz, the UCB1400
uses the tag bit for slot 3 and 4 (PCM L & R) to indicate whether valid data is
present or not.
To control the AC ’97 Controller to output a rate other than 48 kHz, the UCB1400
uses the active-low SLOTREQ bit for slot 3 and slot 4 (PCM L & R) to indicate
whether it needs data from the AC ’97 Controller.
8.5.1
SLOTREQ protocol
To control the AC ’97 Controller to output a rate other than 48 kHz, the UCB1400
examines its sample rate control registers, the state of its FIFOs, and the incoming
SDATA_OUT tag bits at the beginning of each audio output frame to determine which
SLOTREQ bits to set active (LOW). SLOTREQ bits asserted during the current audio
input frame signal which active output slots require data from the AC ’97 Digital
Controller in the next audio output frame. An active output slot is defined as any slot
supported by UCB1400 that is not in a power-down state.
In case of UCB1400, the only SLOTREQ bits used are that for slot 3 and slot 4
request (bits 11 and 10 of input slot 1). SLOTREQ bits for all other slots shall be
stuffed with 0s by UCB1400. Note that although SLOTREQ bits reside in slot 1, their
validity does not depend on the tag bit for Valid Slot 1 Address (see also
Section 8.4
).
8.6 Wake-up support
Pressing the touch screen is an example of events that might need to wake-up the
host CPU that has suspended into a low power state.
Figure 11
shows the AC Link
power-down/power-up sequence. The UCB1400 powers down the AC Link
subsequent to its PR4 bit being programmed to 1. When enabled to wake on, e.g., a
touch screen event, a wake event causes the UCB1400 to transition IRQOUT from
LOW to HIGH. The system controller can use this information as a signal to wake up.
Subsequently, the first thing that the device driver must do to reestablish
communications with the UCB1400 is to command the AC ’97 Digital Controller to
execute a warm reset to the AC Link. Alternatively, if the GIEN bit in the Feature
CSR1 register (0x6A) is set, a wake event will cause the UCB1400 to transition its
SDATA_IN from LOW to HIGH. The UCB1400 shall keep SDATA_IN HIGH until it has
sampled SYNC having gone HIGH, and then LOW.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| UCB1400BE | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Audio codec with touch screen controller and power management monitor |
| UCB1400BE,128 | 功能描述:接口—CODEC AUDIO CODEC WITH TOUCHSCREEN RoHS:否 制造商:Texas Instruments 類型: 分辨率: 轉(zhuǎn)換速率:48 kSPs 接口類型:I2C ADC 數(shù)量:2 DAC 數(shù)量:4 工作電源電壓:1.8 V, 2.1 V, 2.3 V to 5.5 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:DSBGA-81 封裝:Reel |
| UCB1400BE,151 | 功能描述:接口—CODEC AUDIO CODEC RoHS:否 制造商:Texas Instruments 類型: 分辨率: 轉(zhuǎn)換速率:48 kSPs 接口類型:I2C ADC 數(shù)量:2 DAC 數(shù)量:4 工作電源電壓:1.8 V, 2.1 V, 2.3 V to 5.5 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:DSBGA-81 封裝:Reel |
| UCB1400BE,157 | 功能描述:接口—CODEC DO NOT USE ORDER -S OR -T PART RoHS:否 制造商:Texas Instruments 類型: 分辨率: 轉(zhuǎn)換速率:48 kSPs 接口類型:I2C ADC 數(shù)量:2 DAC 數(shù)量:4 工作電源電壓:1.8 V, 2.1 V, 2.3 V to 5.5 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:DSBGA-81 封裝:Reel |
| UCB1400BEFE | 功能描述:IC AUDIO CODEC W/TCH SCRN 48LQFP RoHS:是 類別:集成電路 (IC) >> 接口 - 編解碼器 系列:- 標準包裝:2,500 系列:- 類型:立體聲音頻 數(shù)據(jù)接口:串行 分辨率（位）:18 b ADC / DAC 數(shù)量:2 / 2 三角積分調(diào)變:是 S/N 比，標準 ADC / DAC (db):81.5 / 88 動態(tài)范圍，標準 ADC / DAC (db):82 / 87.5 電壓 - 電源，模擬:2.6 V ~ 3.3 V 電壓 - 電源，數(shù)字:1.7 V ~ 3.3 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:48-WFQFN 裸露焊盤 供應(yīng)商設(shè)備封裝:48-TQFN-EP（7x7） 包裝:帶卷 (TR) |
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