WM8255 datasheet(39/49 Pages) CIRRUS

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WM8255

Production Data

PD, Rev 4.7, August 2013

MCLK

VSMP

VINP

OP[3:0]

(DEL = 00)

16.5 MCLK PERIODS

OP[3:0]

(DEL = 01)

OP[3:0]

(DEL = 10)

OP[3:0]

(DEL = 11)

A B C D A B C D A B C D A B C D

A B C D

A B C D A B C D A B C D

A B C D

A B C D A B C D

A B C D A B C D A B C D

A B C D

Figure 32 Mode 3 Operation

DEVICE REVISION CODES

To read the device revision code the test registers must be accessed. Table 7 defines the method:

DEVICE REVISION CODE

Address

Data

Comment

0x01

0xA3

This will put the part into test configuration mode. Any address will

now point to

the extended page reconfiguration register

0x27

Read

Read all eight bits of this register. Bit[7:1] contain the revision code

information, Bit[0]

should be ignored

0x01

0x23

This will take the part back into normal operating mode.

Table 7 Revision Code

Note: For Rev C devices it will read ‘01’

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