參數(shù)資料
型號： STA450A
廠商： 意法半導體
英文描述： XMRADIO SDARS SERVICE LAYER & SOURCE DECODER
中文描述： XMRADIO衛(wèi)星數(shù)字收音機服務層
文件頁數(shù)： 12/66頁
文件大小： 439K
代理商： STA450A
STA450A
12/66
b) Read sequences
1.5 Data Output Port
The STA450A sends data through the Data Port. The Data Port consists of 3 lines: DP_CLK, DP_DATA,
DP_EN. The communication protocol is in burst.
The data changes on the DP_DATA line on the raising edge of the clock line DP_CLK, the DP_EN line defines
when the data is valid; DP_DATA and DP_EN must be sampled on the falling edge of DP_CLK.
The Service Component is output through the Data Port without adding a flag indicating the frame.
The Data Port burst rate is selectable through the XM Stack Command DATAPORT_CH_FREQUENCY (op-
code 0x07) from 1 MHz to 12 MHz, the default rate is 2 MHz.
Figure 7. Data Port Protocol Waveform Diagram
1.6 IEC958 Output (SPDIF)
The SPDIF output is a Fully IEC958 formatted, single ended output for linear PCM output (left and right channel,
16,18, 20 & 24 bits) supporting the Consumer Mode.
START
SLAVE AD-
DATA
R
SA
NMA STOP
SINGLE READ
START
SLAVE ADDRESS
FIRST DATA
R
SA
STOP
MULTIPLE READ
MA
SECOND DATA
NMA
START
SLAVE ADDRESS
SUB-ADDRESS
WSA
COMBINED FORMAT : SUB-ADDRESS + SINGLE READ
DATA FROM @
W
STAR
SLAVE AD-
R SA
NMA STOP
SA
START
SLAVE ADDRESS
W
SA
SUB-ADDRESS @
SA START
SLAVE ADDRESS
R
SA
DATA FROM @ + 1
MA
DATA FROM @
NMA
STOP
R : R/W BIT = READ
SA : SLAVE ACKNOWLEDGE
MA : MASTER ACKNOWLEDGE
NMA : NO MASTER ACKNOWLEDGE (LAST DATA)
@ : SUB-ADDRESS VALUE
COMBINED FORMAT : SUB-ADDRESS + MULTIPLE READ
DP_DATA
DP_CLK
DP_EN
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