STA335W datasheet(32/43 Pages) STMICROELECTRONICS

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STA335W

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5.9

User-defined coefficient control registers (addr 0x16 - 0x26)

5.9.1

Coefficient address register

5.9.2

Coefficient data register bits 23:16

5.9.3

Coefficient data register bits 15:8

5.9.4

Coefficient data register bits 7:0

5.9.5

Coefficient write/read control register

Coefficients for user-defined scaling are handled internally in the STA335W via RAM.

Access to this RAM is available to the user via an I2C register interface. A collection of I2C

registers are dedicated to this function. One contains a coefficient base address, five sets of

three store the values of the 24-bit coefficients to be written or that were read, and one

contains bits used to control the write/read of the coefficient(s) to/from RAM.

Note:

The read and write operation on RAM coefficients works only if LRCKI (pin 29) is switching.

Reading a coefficient from RAM

Select the RAM block with register 0x31 bit1, bit0.

Write 6-bits of address to I2C register 0x16.

Write 1 to R1 bit in I2C address 0x26.

Read top 8-bits of coefficient in I2C address 0x17.

Read middle 8-bits of coefficient in I2C address 0x18.

Read bottom 8-bits of coefficient in I2C address 0x19.

CFA5

CFA4

CFA3

CFA2

CFA1

CFA0

C1B23

C1B22

C1B21

C1B20

C1B19

C1B18

C1B17

C1B16

C1B15

C1B14

C1B13

C1B12

C1B11

C1B10

C1B9

C1B8

C1B7

C1B6

C1B5

C1B4

C1B3

C1B2

C1B1

C1B0

Reserved

000

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