PCM1850

PCM1851

SLES108 − MARCH 2004

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26

MODE CONTROL REGISTERS

User-Programmable Mode Control Functions

The PCM1850/1851 has several user-programmable functions which are accessed via control registers. The registers are

programmed using the serial control port which is discussed in the SPI Serial Control Port for Mode Control (PCM1850)

and I2C Serial Control Port for Mode Control (PCM1851) sections of this data sheet. Table 6 lists the available mode control

functions, along with their reset default conditions and associated register index.

Register Map

The mode control register map is shown in Table 7. Each register includes an index (or address) indicated by the IDX[6:0]

bits B[14:8].

Table 6. User-Programmable Mode Control Functions

FUNCTION

RESET DEFAULT

REGISTER

BIT(S)

Mode register reset

Normal operation

31

MRST

PGA gain control

–11 dB

31

PG[5:0]

Multiplexer input channel control

Channel 1

32

CH[2:0]

HPF bypass control

HPF enable

33

BYP

System reset

Normal operation

33

SRST

Audio interface mode control

Slave

33

MD[1:0]

Audio interface format control

I2S

33

FMT[2:0]

Table 7. Mode Control Register Map

HEX

B15

B14

B13

B12

B11

B10

B9

B8

B7

B6

B5

B4

B3

B2

B1

B0

Register 31

0

0

1

1

0

0

0

1

RSV

MRST

PG5

PG4

PG3

PG2

PG1

PG0

Register 32

0

0

1

1

0

0

1

0

RSV

RSV

RSV

RSV

RSV

CH2

CH1

CH0

Register 33

0

0

1

1

0

0

1

1

BYP

SRST

RSV

MD1

MD0

FMT2 FMT1 FMT0

NOTE: RSV bit must be always written as 0. No values can be written in address 30h.