STLC5048 datasheet(27/45 Pages) STMICROELECTRONICS

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STLC5048

PCMR Data Register (PCMRD)

Addr=5Ch; Reset Value=00h

Addr=5Dh; Reset Value=00h

Read only

This register is used to read transmit PCM data via the MCU interface. Reading this register the IPCM interrupt

(if generated only by reading access) is automatically cleared.

In A/

µ law only the first 8 bit are used. In linear code option both registers must be read, first the LSB and after

the MSB.

PCM Control Register (PCMCTRL)

Addr= 5Eh; Reset Value=00h

Read only

PMW = 1: Data is not written every FS while writing PCM access data is enabled.

POW = 1: Data is not read every FS while reading PCM access data is enabled.

WRD = 1: Device is waiting for PCM data insertion in PCMWD register. The bit is reset after writing at least one byte.

RRD = 1: Data are available on PCMRD register. The bit is reset after reading the two bytes of the register (first

the LSB and after the MSB).

Tone Generation register (TONEG)

Addr=60h; Reset Value=00h

Tn0=0,Tn1=0: No tone is generated on ch #n

Tn0=1,Tn1=0: A tone with 25Hz frequency is generated on ch #n.

Tn0=0,Tn1=1: A tone with 1KHz frequency is generated on ch #n.

Tn0=1,Tn1=1: A tone with 3KHz frequency is generated on ch #n.

This register allows the generation of a tone in the RX direction.

Bit7

Bit6

Bit5

Bit4

Bit3

Bit2

Bit1

Bit0

011100

Bit7

Bit6

Bit5

Bit4

Bit3

Bit2

Bit1

Bit0

011101

D15

D14

D133

D12

D11

D10

Bit7

Bit6

Bit5

Bit4

Bit3

Bit2

Bit1

Bit0

011110

RRD

WRD

POW

PMW

Bit7

Bit6

Bit5

Bit4

Bit3

Bit2

Bit1

Bit0

R/W

100000

T31

T30

T21

T20

T11

T10

T01

T00

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