PCM3060PWR datasheet(25/45 Pages) BURR-BROWN

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MSB

IDX6

IDX5

IDX4

IDX3

IDX2

IDX1

IDX0

LSB

R0001-01

IDX0

IDX6

IDX1

IDX2

IDX3

IDX4

IDX5

IDX6

T0048-01

PCM3060

SLAS533 – MARCH 2007

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 register specified by IDX[6:0].

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

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