ST7DALI datasheet(76/141 Pages) STMICROELECTRONICS

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ST7DALI

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DALI COMMUNICATION MODULE (Cont’d)

11.4.11 Register Description

DCM DATA RATE CONTROL REGISTER

(DCMCLK)

Read / Write

Reset Value: 0000 0000 (00h)

Bits 7:0 = DCMCLK[7:0] Clock Prescaler.

These bits are set/cleared by software and cleared

by hardware after a reset.

These 8 bits are used for tuning the DALI data

rate. fDATA = fCPU/[(N+1)*16] where N is the inte-

ger value of the DCMCLK register.

DCM FORWARD ADDRESS REGISTER

(DCMFA)

Read only

Reset Value: 0000 0000 (00h)

Bits 7:0 = DCMFA[7:0] Forward Address.

These bits are read by software and set/cleared by

hardware.

These 8 bits are used to store the "forward frame"

address byte.

DCM FORWARD DATA REGISTER (DCMFD)

Read only

Reset Value: 0000 0000 (00h)

Bits 7:0 = DCMFD[7:0] Forward Data.

These bits are read by software and set/cleared by

hardware.

These 8 bits are used to store the "forward frame"

data byte.

DCM BACKWARD DATA REGISTER (DCMBD)

Read / Write

Reset Value: 0000 0000 (00h)

Bits 7:0 = DCMBD[7:0] Backward Data.

These bits are set/cleared by software and cleared

by hardware after a reset.

These 8 bits are used to store the "backward

frame" data byte. The sofware writes to this regis-

ter before enabling the transmit operation.

CK7

CK6

CK5

CK4

CK3

CK2

CK1

CK0

FA7

FA6

FA5

FA4

FA3

FA2

FA1

FA0

FD7

FD6

FD5

FD4

FD3

FD2

FD1

FD0

BD7

BD6

BD5

BD4

BD3

BD2

BD1

BD0

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