CS47L35 datasheet(130/300 Pages) CIRRUS

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DS1085F3

CS47L35

4.10 SLIMbus Interface Control

4.10.3 SLIMbus Port Number Control

The CS47L35 SLIMbus interface supports up to six input (RX) channels and up to six output (TX) channels. The SLIMbus

port numbers for these audio channels are configurable using the fields described in Table 4-53.

4.10.4 SLIMbus Sample-Rate Control

The SLIMbus RX inputs may be selected as input to the digital mixers or signal-processing functions within the CS47L35

digital core. The SLIMbus TX outputs are derived from the respective output mixers.

The sample rate for each SLIMbus channel is configured using SLIMRXn_RATE and SLIMTXn_RATE—see Table 4-21

within the Digital Core section.

Sample-rate conversion is required when routing the SLIMbus paths to any signal chain that is configured for a different

sample rate.

4.10.5 SLIMbus Signal Path Enable

The SLIMbus interface supports up to six input (RX) channels and up to six output (TX) channels. Each of these channels

can be enabled or disabled using the fields defined in Table 4-54.

Presence Rate

Note that the Presence Rate must be the same as the sample rate selected for

the associated CS47L35 SLIMbus path.

Root Frequency

—

Restart Time

CS47L35 supports the following RT codes:

0x0 = Fast Recovery

0x2 = Unspecified Delay

When either of these values is specified, the CS47L35 resumes toggling the

CLK line within four cycles of the CLK line frequency.

Segment Distribution

Note that any data channels that are assigned the same SAMPLE_RATE_n

value must also be assigned the same Segment Interval.

Segment Length

—

Subframe Mode

—

TID

Transaction ID

—

Transport Protocol

CS47L35 supports the following TP codes for TX channels:

0x0 = Isochronous Protocol

0x1 = Pushed Protocol

CS47L35 supports the following TP codes for RX channels:

0x0 = Isochronous Protocol

0x2 = Pulled Protocol

Value Slice

—

Value Update

—

Table 4-53. SLIMbus Port Number Control

Bit

Label

Default

Description

R1490 (0x05D2)

SLIMbus_RX_Ports0

13:8

SLIMRX2_PORT_ADDR[5:0]

SLIMbus RX Channel n Port number

Valid from 0–31

5:0

SLIMRX1_PORT_ADDR[5:0]

R1491 (0x05D3)

SLIMbus_RX_Ports1

13:8

SLIMRX4_PORT_ADDR[5:0]

5:0

SLIMRX3_PORT_ADDR[5:0]

R1492 (0x05D4)

SLIMbus_RX_Ports2

13:8

SLIMRX6_PORT_ADDR[5:0]

5:0

SLIMRX5_PORT_ADDR[5:0]

R1494 (0x05D6)

SLIMbus_TX_Ports0

13:8

SLIMTX2_PORT_ADDR[5:0]

SLIMbus TX Channel n Port number

Valid from 0–31

5:0

SLIMTX1_PORT_ADDR[5:0]

R1495 (0x05D7)

SLIMbus_TX_Ports1

13:8

SLIMTX4_PORT_ADDR[5:0]

5:0

SLIMTX3_PORT_ADDR[5:0]

R1496 (0x05D8)

SLIMbus_TX_Ports2

13:8

SLIMTX6_PORT_ADDR[5:0]

5:0

SLIMTX5_PORT_ADDR[5:0]

Table 4-52. SLIMbus Parameter Support (Cont.)

Parameter Code

Description

Comments

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