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
文件頁數(shù)： 36/66頁
文件大?。?/td> 439K
代理商： STA450A
STA450A
36/66
3.3.8
DATAPORT_CH_FREQUENCY
3.3.9
SERVICE_CHECK
BYTE
FIELD
VALUE
DESCRIPTION
0
DP_CF_REQ
0x07
Data port change frequency Request
header
1
Data port frequency divider
Max. 0x05 – 12 Mhz
Default 0x1E – 2 Mhz
Min. 0x3C – 1Mhz
System clock divider.
E.g. Divider = 0x1E (30)
DpClk = (SysClk / 12);
DpClk = (60 Mhz / 12) = 2 Mhz
BYTE
FIELD
VALUE
DESCRIPTION
0
DP_CF_CFM
0x87
Data port change frequency confirmation
BYTE
FIELD
VALUE
DESCRIPTION
0
SERVICE_CHECK_REQ
0x10
Service Check Request header
1
Sid
1-255
Service identifier
2
extract_type
0x00 – Audio
0x01 – Data
Service type to extract. MMI can extract the
audio or data service component.
BYTE
FIELD
VALUE
DESCRIPTION
0
SERVICE_CHECK_CFM
0x90
Service Check Confirm header
1
service_check_status
bit 7 – Service Present
0x80 – SID_PRESENT
0x00 – SID_ABSENT
bit 6 – PC Forma
t
0x40 – PC_STANDARD
0x00 – PC_NONSTANDARD
bit 5 – Service On-Air
0x20 – SERVICE_ONAIR
0x00 – SERVICE_OFFAIR
bit 4 – Service Type
0x10 – TYPE_PRESENT
0x00 – TYPE_ABSENT
bit 3 – Service Free
0x08 – SERVICE_FREE
0x00 – SERVICE_NOTFREE
bit 2 – Activation
0x04 – ACT_PRESENT
0x00 – ACT_ABSENT
bit 1 – Authorization
0x02 – AUTH_PRESENT
0x00 – AUTH_ABSENT
b0 – Reserved
The bits are ordered from left to right.
The MSB is on the left and the LSB is
on the right.
b7, b6, b5, b4, b3, b2, b1, b0
2
channel_number
1 – 255
channel number for the service
3,4,5,6
crw
Channel Reference Word
Reference: Service Layer
Specification.
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