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): 7/63頁
文件大小: 674K
代理商: UCB1400
Philips Semiconductors
UCB1400
Audio codec with touch screen controller
and power management monitor
Product data
Rev. 02 — 21 June 2002
7 of 63
9397 750 09611
Koninklijke Philips Electronics N.V. 2002. All rights reserved.
8.3 Digital interface
8.3.1
AC-link digital serial interface protocol
The UCB1400 incorporates a 5-pin digital serial interface that links it to the AC ’97
Controller. AC-link is a bi-directional, fixed rate, serial PCM digital stream. It handles
multiple input, and output audio and modem streams, as well as control register
accesses employing a time division multiplexed (TDM) scheme. The AC-link
architecture divides each audio frame into 12 outgoing and 12 incoming data
streams, each with 20-bit sample resolution. The control and data slots defined by
UCB1400 include:
SDATA_OUT TAG (output slot 0)
SDATA_IN TAG (input slot 0)
Control (CMD ADDR & DATA) write port (output slots 1, 2)
Status (STATUS ADDR & DATA) read port (input slots 1, 2)
PCM L & R DAC playback (output slots 3, 4)
PCM L & R ADC record (input slots 3, 4)
GPIO interrupt status (input slot 12)
The AC-link protocol provides for a special 16-bit time slot (Slot 0) wherein each bit
conveys a valid tag for its corresponding time slot within the current audio frame.
A 1 in a given bit position of slot 0 indicates that the corresponding time slot within the
current audio frame has been assigned to a data stream, and contains valid data.
SYNC remains HIGH for a total duration of 16 BIT_CLKs at the beginning of each
audio frame. The portion of the audio frame where SYNC is HIGH is defined as the
Tag Phase. The remainder of the audio frame where SYNC is LOW is defined as the
“Data Phase”. Additionally, for power savings, all clock, sync, and data signals can be
halted. UCB1400 is implemented as a static design to allow its register contents to
remain intact when entering a power savings mode.
Fig 5.
Standard bi-directional audio frame.
TAG
CMD
ADDR
CMD
DATA
PCM
L
PCM
R
LINE 1
DAC
PCM
CENTER
PCM
L SURR
PCM
R SURR
PCM
LFE
LINE 2
DAC
HSET
DAC
IO
CTRL
TAG
STATUS
ADDR
STATUS
DATA
PCM
L
PCM
R
LINE 1
ADC
MIC
ADC
RSRVD
LINE 2
ADC
HSET
ADC
IO
STATUS
RSRVD
RSRVD
1
2
3
4
5
6
7
8
9
10
11
12
0
SLOT #
SYNC
SDATA_OUT
SDATA_IN
CODEC ID
PCM C
(n+1)
PCM R
(n+1)
SLOTREQ 3–12
PCM L
(n+1)
SN00220
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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
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