CMODE - Clock Mode Select, PIN 12.

CMODE should be tied low to select an ICLKD frequency of 256 X the output word rate.

CMODE should be tied high to select an ICLKD frequency of 384 X the output word

rate.

SMODE - Serial Interface Mode Select, PIN 13.

SMODE should be tied high to select serial interface master mode, where SCLK, FSYNC

and L/R are all outputs, generated by internal dividers operating from ICLKD. SMODE

should be tied low to select serial interface slave mode, where SCLK, FSYNC and L/R

are all inputs. In slave mode, L/R, FSYNC and SCLK need to be derived from ICLKD

using external dividers.

Digital Outputs

SDATA - Serial Data Output, PIN 16.

Audio data bits are presented MSB first, in 2’s complement format. Additional tag bits,

which indicate input overload and left/right channel data, are output immediately

following each audio data word.

DCAL - Digital Calibrate Output, PIN 9.

DCAL rises immediately upon entering the power-down state (DPD brought high). It

returns low 4096 L/R periods after leaving the power down state (DPD brought low),

indicating the end of the offset calibration cycle (which = 85.33 ms with a 12.288 MHz

ICLKD). May be connected to ACAL.

OCLKD - Digital Section Output Clock, PIN 21.

OCLKD is always 128 X the output word rate. Normally connected to ICLKA.

Digital Inputs or Outputs

SCLK - Serial Data Clock, PIN 15.

Data is clocked out on the rising edge of SCLK for the CS5336 and CS5338. Data is

clocked out on the falling edge of SCLK for the CS5339.

In master mode (SMODE high), SCLK is a continuous output clock at 64 X the output

word rate.

In slave mode (SMODE low), SCLK is an input, which requires a continuously supplied

clock at any frequency from 32 X to 128 X the output word rate (64 X is preferred).

When FSYNC is high, SCLK clocks out serial data, except for the MSB which appears on

SDATA when L/R changes.

CS5336, CS5338, CS5339

3-56

DS23F1