PRELIMINARY DATA SHEET
MSP 44x8G
3.1.4. Proposals for General MSP 44x8G
I2C Telegrams
3.2. Start-Up Sequence:
Power-Up and I2C Controlling
3.1.4.1. Symbols
After POWER ON or RESET (see Fig. 4–20 on
page 56), the IC is in an inactive state. All registers are
in the reset position (seeTable 3–5 and Table 3–6), the
analog outputs are muted. The controller has to initial-
ize all registers for which a non-default setting is nec-
essary.
daw
dar
<
write device address (80hex, 84hex or 88hex)
read device address (81hex, 85hex or 89hex
Start Condition
)
>
Stop Condition
aa
dd
Address Byte
Data Byte
3.3. MSP 44x8G Programming Interface
3.3.1. User Registers Overview
3.1.4.2. Write Telegrams
<daw 00 d0 00>
write to CONTROL register
write data into demodulator
write data into DSP
The MSP 44x8G is controlled by means of user regis-
ters. The complete list of all user registers is given in
the following tables. The registers are partitioned into
the demodulator section (subaddress 10hex for writing,
11hex for reading) and the baseband processing sec-
tions (subaddress 12hex for writing, 13hex for reading).
<daw 10 aa aa dd dd>
<daw 12 aa aa dd dd>
3.1.4.3. Read Telegrams
<daw 11 aa aa <dar dd dd> read data from demodulator
<daw 13 aa aa <dar dd dd> read data from DSP
Write and read registers are 16-bit wide, whereby the
MSB is denoted bit[15]. Transmissions via I2C bus have
to take place in 16-bit words (two byte transfers, with the
most significant byte transferred first). All write registers,
except the demodulator write registers, are readable.
3.1.4.4. Examples
<80 00 80 00>
RESET MSP statically
Clear RESET
Unused parts of the 16-bit write registers must be zero.
Addresses not given in this table must not be written.
<80 00 00 00>
<80 10 00 20 00 03>
Set demodulator to stand. 03hex
<80 11 02 00 <81 dd dd> Read STATUS
An overview of all MSP 44x8G write registers is shown
in Table 3–5; all read registers are given in Table 3–6.
<80 12 00 08 01 20>
Set main channel
source to NICAM and
Matrix to STEREO
Additional read and write registers, together with a
detailed description of the manual mode, can be found
in the “Appendix B: Manual Mode” on page 73.
More examples of typical application protocols are
listed in Section 3.4. “Programming Tips” on page 34.
Micronas
17
MICRONAS [ MICRONAS ]
