DATA SHEET
MSP 34x0G
3.3.2.6. Write Registers on I2C Subaddress 12hex
Table 3–11: Write Registers on I2C Subaddress 12hex
Register
Address
Function
Name
PREPROCESSING
00 0Ehex FM/AM Prescale
PRE_FM
bit[15:8] 00hex
Defines the input prescale gain for the demodulated
FM or AM signal
...
7Fhex
00hex
off (RESET condition)
For all FM modes except satellite FM and AM-mode, the combinations of pres-
cale value and FM deviation listed below lead to internal full scale with 1 kHz
test signal and 50 µs emphasis.
FM mode
bit[15:8] 7Fhex
48hex
28 kHz FM deviation
50 kHz FM deviation
75 kHz FM deviation
100 kHz FM deviation
150 kHz FM deviation
180 kHz FM deviation (limit)
30hex
24hex
18hex
13hex
FM high deviation mode (HDEV2, MSP Standard Code = Chex
)
bit[15:8] 30hex
14hex
150 kHz FM deviation
360 kHz FM deviation (limit)
FM very high deviation mode (HDEV3, MSP Standard Code = 6 and Dhex
)
bit[15:8] 20hex
1Ahex
450 kHz FM deviation
540 kHz FM deviation (limit)
Satellite FM with adaptive deemphasis
bit[15:8] 10hex recommendation
AM mode (MSP Standard Code = 9)
bit[15:8] 7Chex recommendation for SIF input levels from
0.1 Vpp to 0.8 Vpp
(Due to the AGC being switched on, the AM-output level
remains stable and independent of the actual SIF-level in
the mentioned input range)
Micronas
May 27, 2003; 6251-476-1DS
29
MICRONAS [ MICRONAS ]
