TMPR3911 datasheet(289/462 Pages) TOSHIBA

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Chapter 13 SIB Module

13-19

13.6 SIB Registers

13.6.1

SIB Size Register

OFFSET

= $060:

write-only

Bit

Label

RESET

Read/Write

31-30

Reserved

29-18

SNDSIZE[13:2]

17-14

Reserved

13-2

TELSIZE[13:2]

1-0

Reserved

SNDSIZE[13:2]:

write-only

These bits define the size of the sound DMA buffers (16 Kbytes maximum). Both the sound RX

buffer and the sound TX buffer are the same size. The last address in the sound RX DMA buffer is

given by SNDRXSTART[31:2]

+ SNDSIZE[13:2]. The last address in the sound TX DMA buffer

is given by SNDTXSTART[31:2]

+ SNDSIZE[13:2]. The value loaded into SNDSIZE should be

equal to the desired buffer length

−1.

Note that this register is write only.

TELSIZE[13:2]:

write-only

These bits define the size of the telecom DMA buffers (16 Kbytes maximum). Both the telecom

RX buffer and the telecom TX buffer are the same size. The last address in the telecom RX DMA

buffer is given by TELRXSTART[31:2]

+ TELSIZE[13:2]. The last address in the telecom TX

DMA buffer is given by TELTXSTART[31:2]

+ TELSIZE[13:2]. The value loaded into TELSIZE

should be equal to the desired buffer length

−1.

Note that this register is write only.

13.6.2

SIB Sound RX Start Register

OFFSET

= $064:

write-only

Bit

Label

RESET

Read/Write

31-2

SNDRXSTART[31:2]

1-0

Reserved

SNDRXSTART[31:2]:

write-only

These bits define the start address for the sound RX DMA buffer. The sound RX buffer and

sound TX buffer can be configured to either reside in different memory spaces or share the same

memory space (overlapping buffers for loopback purposes or for optimum memory allocation).

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