MSP 34x2G
PRELIMINARY DATA SHEET
6.1. Demodulator Write and Read Registers for Manual/Compatibility Mode
Table 6–1: Demodulator Write Registers; Subaddress: 10hex; these registers are not readable!
Demodulator
Write Registers
Address MSP-
Description
Reset
Mode
Page
(hex)
Version
AUTO_FM/AM
00 21
3411,
3451
1. MODUS[0]=1 (Automatic Sound Select): Switching Level threshold of 00 00
Automatic Switching between NICAM and FM/AM in case of bad NICAM
reception
87
1)
2. MODUS[0]=0 (Manual Mode): Activation and configuration of Automatic
Switching between NICAM and FM/AM in case of bad NICAM reception
A2_Threshold
CM_Threshold
AD_CV
00 22
00 24
00 BB
00 83
all
A2 Stereo Identification Threshold
00 19
89
89
90
91
hex
all
Carrier-Mute Threshold
00 2A
00 00
hex
all
SIF-input selection, configuration of AGC, and Carrier-Mute Function
MODE_REG
3411,
3451
Controlling of MSP-Demodulator and Interface options. As soon as this 00 00
register is applied, the MSP 34x2G works in the MSP 34x0D Compatibility
Mode.
1)
Warning: In this mode, BTSC, EIA-J, and FM-Radio are disabled. Only
MSP 34x0D features are available; the use of MODUS and STATUS register
is not allowed.
The MSP 34x2G is reset to the normal mode by first programming the
MODUS register followed by transmitting a valid standard code to the
STANDARD SELECTION register.
FIR1
FIR2
00 01
00 05
FIR1-filter coefficients channel 1 (6 8 bit)
FIR2-filter coefficients channel 2 (6 8 bit), + 3 8 bit offset (total 72 bit)
00 00
00 00
93
93
DCO1_LO
DCO1_HI
00 93
00 9B
Increment channel 1 Low Part
Increment channel 1 High Part
DCO2_LO
DCO2_HI
00 A3
00 AB
Increment channel 2 Low Part
Increment channel 2 High Part
PLL_CAPS
00 1F
Not of interest for the customer
00 56
96
Switchable PLL capacitors to tune open-loop frequency
1)
not in BTSC, EIA-J, and FM-Radio mode
Note: All registers except AUTO_FM/AM, A2_Threshold and CM-Threshold are initialised during STANDARD SELECTION and are
automatically updated when Automatic Sound Select (MODUS[0]=1) is on.
Table 6–2: Demodulator Read Registers; Subaddress: 11hex; these registers are not writable!
Demodulator
Address MSP-
Description
Page
Read Registers
(hex)
00 23
00 38
00 3E
00 57
02 1F
02 1E
Version
C_AD_BITS
ADD_BITS
CIB_BITS
3411,
3451
NICAM-Sync bit, NICAM-C-Bits, and three LSBs of additional data bits
NICAM: bit [10:3] of additional data bits
NICAM: CIB1 and CIB2 control bits
NICAM error rate, updated with 182 ms
Not for customer use
95
95
95
96
96
96
ERROR_RATE
PLL_CAPS
AGC_GAIN
Not for customer use
86
Micronas
MICRONAS [ MICRONAS ]
