MSP 3400C
PRELIMINARY DATA SHEET
6.2.2. Control Register ‘MODE_REG’
The register ‘MODE_REG’ contains the control bits de-
termining the operation mode of the MSP 3400C; Table
6–7 explains all bit positions.
Table 6–7: Control word ‘MODE_REG’: All bits are “0” after power-on-reset
Bit
[0]
[1]
[2]
[3]
[4]
[5]
Function
DMA_SYNC
DCTR_TRI
I2S_TRI
Comment
Definition
Recom-
mendation
1)
Synchronization to DMA
Digital control out 0/1 tristate
0 : off
1 : on
X
0
0 : active
1 : tristate
2
I S outputs tristate (I2S_CL,
0 : active
1 : tristate
0
I2S_WS, I2S_DA_OUT)
2
1)
I S Mode
Master/Slave mode of the
0 : Master
1 : Slave
X
X
X
2
I S bus
2
I S_WS Mode
WS due to the Sony or
Philips-Format
0 : Sony
1 : Philips
Audio_CL_OUT
switch Audio_Clock_Output
to tristate
0 : on
1 : tristate
[6]
[7]
[8]
not used
FM1 FM2
AM
must be 0
0
MSPC-channel 1 mode
MSPC-channel 1/2 mode
s.Table 6–8
s.Table 6–8
0 : FM
1 : AM
[9]
HDEV
High Deviation Mode
(channel matrix must be
sound A )
0 : normal mode
1 : high deviation mode
s.Table 6–8
[10]
[11]
not used
must be 1
1
0
2)
S-Bus Mode
modeofPinsS_CLandS_ID
see table 6–10
0 : Tristate
1 : Active
[12]
[13]
[14]
FM2 FIR Filter Gain
(FM2 = Ch1)
0 : Gain = 6 dB
1 : Gain = 0 dB
0
0
X
0
FM2 FIR Filter Coeff. Set
(FM2 = Ch1)
see table 6–10
0 : use FIR_REG_1
1 : use FIR_REG_2
ADR
Mode of ADR Interface
0 : normal mode
1 : ADR mode
[15]
AM-Gain
additional gain in AM-mode
0 : 0 dB
1 : +12 dB
1)
2
In case of synchronization to DMA, no I S-slave mode possible.
X: Depend-
ing on mode
2
2
In case of I S-slave mode, no synchronization to DMA allowed. I S-Slave mode dominates.
The normal operation mode is ‘Tristate’; SBUS is only used in conjunction with DMA.
2)
MICRONAS INTERMETALL
23
MICRONAS [ MICRONAS ]
