CS5543 datasheet(17/30 Pages) CIRRUS

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CS5542 CS5543

DS109PP2

written with two read cycles using different com-

mands to read either the MSW (Most Significant

Word) or the LSW (Least Significant Word).

When reading or writing to the calibration regis-

ters, the register contents are time-division multi-

plexed into or out of the CS5543 in the same

manner as conversion data as shown in Figure 5.

In addition to writing or reading the calibration reg-

isters, the CS5543 provides several test modes.

Some of these test modes are as follows: The

DATAOUT [3:0] pins can be set to a high imped-

ance output state; or either of two different test pat-

terns can be requested to be output on the

DATAOUT [3:0] pins of the CS5543. See Table 4

for the test pattern information.

Commands to change calibration modes or control

modes should not be issued to the system while a

calibration is in progress. New data for the calibra-

tion or control modes is latched on every falling

edge of CLKIN and takes effect on the following

rising edge of FRAME.

Test Pattern #1:

(all channels)

Table 4. Test Patterns

Parity

MSB

SIGN

LSB

SIGN

Parity

MSB

channel 0

channel 4

Parity

MSB

SIGN

Parity

MSB

channel 2

channel 6

Parity

MSB

SIGN

Parity

MSB

channel 1

channel 5

Parity

MSB

SIGN

Parity

MSB

channel 3

channel 7

DATAOUT [0]

DATAOUT [1]

DATAOUT [2]

DATAOUT [3]

LSB

Figure 5. Data Transfer Timing

HEX

BINARY

Test Pattern #1: (All channels)

A00001

0001 0000 0000 0000 0000 0001

Sign, MSB

LSB, parity

Test Pattern #2:

(Unique for each channel)

Channel

HEX

BINARY

1000A0

000A01

20A000

0A0001

450000

005001

800500

000051

0001 0000 0000 0000 0000 0001

0000 0000 0000 1010 0000 0001

0010 0000 1010 0000 0000 0000

0000 1010 0000 0000 0000 0001

0100 0101 0000 0000 0000 0000

0000 0000 0101 0000 0000 0001

1000 0000 0000 0101 0000 0000

0000 0000 0000 0000 0101 0001

Sign, MSB

LSB, parity

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