Datasheet

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MSB

0 IDX6 IDX5 IDX4 IDX3 IDX2 IDX1 IDX0 D7 D6 D5 D4 D3 D2 D1 D000

LSB

R0001-01

IDX0

D7 D6 D4D5 D3 D2 D1 D00

MD X 0

IDX6

IDX1IDX2IDX3IDX4IDX5IDX6

T0048-01

PCM3060

SLAS533B – MARCH 2007 – REVISED MARCH 2008

All single-write operations via the serial control port use 16-bit data words. Figure 28 shows the control data word

format. The most significant bit must be a 0. There are seven bits, labeled IDX[6:0], that set the register index

(address) for the write operation. The least significant eight bits, D[7:0], contain the data to be written to the

Figure 29 shows the functional timing diagram for single-write operations on the serial control port. MS is held in

the High state until a register is to be written. To start the register write cycle, MS is set to the Low state. Sixteen

clocks are then provided on MC, corresponding to the 16 bits of the control data word on MD. After the sixteenth

clock cycle has completed, MS is set to High to latch the data into the indexed mode control register.

The PCM3060 supports the multiple-write operation in addition to the single-write operation. Multiple write is

performed by sending N-sets of 8-bit register data after the first 16 bits of register address and register data,

while keeping the MC clock and MS in the Low state. Closing the multiple-write operation is done by setting MS

to the High state.

Figure 28. Control Data Word Format for MD

Figure 29. Register Write Operation

Product Folder Link(s): PCM3060