PCM1602 datasheet(13/29 Pages) TI

13 / 29 page

PCM1602

SBAS163

All Write operations for the serial control port use 16-bit

data words. Figure 6 shows the control data word format.

The most significant bit is the Read/Write (R/W) bit. When

set to “0”, this bit indicates a Write operation. There are

seven bits, labeled IDX[6:0], that set the register index (or

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 7 shows the functional timing diagram for writing the

serial control port. ML is held at a logic “1” state until a

ML is set to logic “0”. Sixteen clocks are then provided on

MC, corresponding to the 16-bits of the control data word on

MDI. After the sixteenth clock cycle has completed, ML is

set to logic “1” to latch the data into the indexed mode

control register.

SINGLE REGISTER READ OPERATION

Read operations utilize the 16-bit control word format shown

in Figure 6. For Read operations, the R/W bit is set to “1”.

Read operations ignore the index bits, IDX[6:0], of the

control data word. Instead, the REG[6:0] bits in Control

be read during the Read operation. Bits IDX[6:0] should be

set to 00H for Read operations.

FIGURE 5. Audio Interface Timing.

SYMBOL

PARAMETER

MIN

MAX

UNITS

tBCY

BCK Pulse Cycle Time

32, 48, or 64fS(1)

tBCH

BCK High Level Time

tBCL

BCK Low Level Time

tBL

BCK Rising Edge to LRCK Edge

tLB

LRCK Falling Edge to BCK Rising Edge

tDS

DATA Set Up Time

tDH

DATA Hold Time

NOTE: (1) fS is the sampling frequency (e.g., 44.1kHz, 48kHz, 96kHz, etc.)

LRCK

BCK

DATA1,DATA2,

DATA3, DATA4

50% of V

BCH

BCL

BCY

FIGURE 6. Control Data Word Format for MDI.

IDX5

IDX6

R/W

IDX4

IDX2

IDX3

IDX1

IDX0

MSB

Read/Write Operation

0 = Write Operation

1 = Read Operation (register index is ignored)

LSB

FIGURE 7. Write Operation Timing.

R/W

RW IDX6

IDX6 IDX5 IDX4 IDX3 IDX2 IDX1 IDX0

MDI

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