參數(shù)資料
型號(hào)： STA450A
廠商： 意法半導(dǎo)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(jī)服務(wù)層
文件頁(yè)數(shù)： 39/66頁(yè)
文件大?。?/td> 439K
代理商： STA450A
39/66
STA450A
3.3.13 SERVICE_EXTRACT
3,4,5,6
crw
Channel Reference Word
Reference: Service Layer Specification
If service information block 1 was not
received, then DSP returns
SIB1_ABSENT. If service information
block 1 was received, then DSP returns
SIB1_PRESENT.
Service Information Block 1
Reference: Service Layer Specification
7
sib1_status
0x00 – SIB1_ABSENT
0x01 – SIB1_PRESENT
8 to 15
service_block1
BYTE
FIELD
VALUE
DESCRIPTION
0
SERVICE_EXTRACT_REQ
0x14
Service Extract Request header
1
location
0x00 – location 0
0x01 – location 1
Since DSP can extract two services
simultaneously, XM stack assigns an
extraction location.
2 – 3
pc_detect_time
0x0001 to 0xFFFF
Number of master frame that the DSP
waits for the primary PCID or secondary
PCID.
4
sid
1 – 255
Service Identifier
5
sc_type
0x03 – Audio AMBE
0x05 – Audio AAC+
0x0A – Trans. Data
Service Component Type
Reference: Service Layer Specification;
page 21
6
primary_pcid
5 – 255
Primary Payload Channel Identification
Reference: Transport Layer Specification
7
Secondary_pcid
5 – 255
Secondary Payload Channel
Identification
Reference: Transport Layer Specification
8
Routing
0x00 – No routing
0x01 – AUD_PORT
0x02 – DAT_PORT
0x03 – BOTH_PORT
Routing information
A data service component can only be
routed to the data port (DAT_PORT). An
audio service component be routed to
audio port (AUD_PORT), data port
(DAT_PORT) or both the audio and data
port (BOTH_PORT).
BYTE
FIELD
VALUE
DESCRIPTION
0
SERVICE_EXTRACT_CFM
0x94
Service Extract Confirm header
1
Location
0x00 – location 0
0x01 – location 1
0xFF – command refused
Location assigned to the service. If the
command was refused the location is set
to 0xFF. This can happen if the
extraction of a component with routing
for audio port is commanded and a
component with routing audio port is
already extracted in the other location or
if an inexistent location is passed to the
DSP
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