Datasheet

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MODE CONTROL REGISTERS
User-Programmable Mode Control Functions
Register Map
PCM1850A
PCM1851A
SLES173 – MARCH 2006
The PCM1850A/1851A 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 (PCM1850A) and I
2
C Serial Control Port for Mode Control (PCM1851A) sections of this data sheet.
Table 6 lists the available mode control functions, along with their reset default conditions and associated register
index.
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 I
2
S 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
(1)
MRST PG5 PG4 PG3 PG2 PG1 PG0
Register 32 0 0 1 1 0 0 1 0 RSV
(1)
RSV
(1)
RSV
(1)
RSV
(1)
RSV
(1)
CH2 CH1 CH0
Register 33 0 0 1 1 0 0 1 1 BYP SRST RSV
(1)
MD1 MD0 FMT2 FMT1 FMT0
(1) RSV bits must be always written as 0. No values can be written in address 30h.
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