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STA450A Datasheet(PDF) 33 Page - STMicroelectronics

Part # STA450A
Description  XMRADIO SDARS SERVICE LAYER & SOURCE DECODER
PDF  66 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

STA450A Datasheet(HTML) 33 Page - STMicroelectronics

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STA450A
3.3 DSP COMMAND DESCRIPTION
The commands are composed by two parts: the REQ one (request) and the CFM one (confirmation).
The REQ has to be written in the Command registers (0x6D - 0x7E); the CFM has to be read in the Data Page
registers (0x80 - 0xFF).
After a REQ has been issued the STA450A replies with a CFM within 5 MFP (5 x 432ms).
3.3.1
DSP_PWRUP_REQ
Command
OpCode
Category
Description
DISPLAY_MASK_REQ
0x4C
SERVICE
This command must be issued before power up
SDEC_VER_REQ
0x4D
SERVICE
This command must be issued before power up
The system controller can selected the version of the
SDEC
FAST_CLEAR_EVENT
0x50
FASTR
Clear events and error bit according to applied mask
FAST_DISABLE_REQ
0x51
FASTR
Clear events and error interrupt enable bit according to
applied mask
FAST_ENABLE _REQ
0x52
FASTR
Set events and errors interrupt enable bits according
to applied mask
FAST_EXTRACT_REQ
0x53
FASTR
Service extract in fast mode
BYTE
FIELD
VALUE
DESCRIPTION
0
DSP_PWRUP_REQ
0x00
DSP Initialization Request header
1
serv_label_size
8, 12, 16
Display size for the service label.
2
gen_label_size
8, 12, 16
Display size for the song label, artist
label, and program label.
BYTE
FIELD
VALUE
DESCRIPTION
0
DSP_ PWRUP _CFM
0x80
DSP Initialization Confirm header
1
error_code
0x00 – NO ERROR
0x01 – CAP_IO_ERROR
0x02 – INVALID_NVM_IMAGE
DSP power up error status
2
init_complete_status
0x04 – ACT_PRESENT
0x00 – ACT_ABSENT
Activation Status
If both encryption keys are stored in
memory, then DSP reports
ACT_PRESENT. If no encryption keys
are stored in memory, then DSP reports
ACT_ABSENT.
3
last_ear
0 – 3
Last saved Entered Authorization Rating
(EAR)
4
dsp_sw_version
0x00 – 0xFF
DSP software version
5 – 8
dsp_sw_date
Byte 5: month in BCD.
Byte 6: day in BCD.
Bytes 7,8: Year in BCD.
DSP release date.
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



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