CS47L35 datasheet(214/300 Pages) CIRRUS

214 / 300 page

214

DS1085F3

CS47L35

4.18 Control-Write Sequencer

The DRC signal-detect control sequences are undefined following power-on reset, a hardware reset, or a Sleep Mode

transition. The DRC signal-detect control sequences must be reconfigured by the host processor following any of these

events. Note that all control sequences are maintained in the sequencer memory through software reset.

See Section 4.3.5 for further details of the DRC function.

4.18.4 MICDET Clamp Sequences

The CS47L35 supports external accessory detection functions, including the MICDET clamp circuit. The MICDET clamp

status can be used to trigger the control-write sequencer. The MICDET clamp is controlled by the JD1 and/or JD2 signals,

as described in Table 4-75.

A control-write sequence can be associated with a rising edge and/or a falling edge of the MICDET clamp status. This is

configured using the fields described in Table 4-75.

If one of the selected logic conditions is detected, the control-write sequencer is triggered. The applicable start index

location within the sequencer memory is separately configurable for the rising and falling edge conditions.

The WSEQ_MICD_CLAMP_RISE_INDEX field defines the sequencer start index corresponding to a MICDET clamp

rising edge (clamp active) event, as described in Table 4-105. The WSEQ_MICD_CLAMP_FALL_INDEX field defines the

sequencer start index corresponding to a MICDET clamp falling edge event.

Note that a sequencer start index of 0x1FF causes the respective sequence to be aborted.

The MICDET clamp control sequences are undefined following power-on reset, a hardware reset, or a Sleep Mode

transition. The MICDET clamp control sequences must be reconfigured by the host processor following any of these

events. Note that all control sequences are maintained in the sequencer memory through software reset.

See Section 4.12 for further details of the MICDET clamp status signals.

4.18.5 Event Logger Sequences

The CS47L35 provides four event log functions, for monitoring and recording internal or external signals. The logged

events are held in a FIFO buffer, from which the application software can read details of the detected logic transitions.

The control-write sequencer is automatically triggered whenever the NOT_EMPTY status of the event log buffer is

asserted. A different control sequence may be configured for each of the event loggers.

The WSEQ_EVENTLOGn_INDEX field defines the sequencer start index corresponding to respective event logger (where

is 1 to 4), as described in Table 4-106.

Table 4-104. Write Sequencer Control—DRC Signal-Detect

Label

Default

Description

R110 (0x006E)

Trigger_

Sequence_

Select_32

8:0 WSEQ_DRC1_

SIG_DET_RISE_

INDEX[8:0]

0x1FF DRC1 Signal-Detect (Rising) Write Sequence start index. Contains the index location in

the sequencer memory of the first command in the sequence associated with DRC1

Signal-Detect (Rising) detection.

Valid from 0 to 251 (0x0FB).

R111 (0x006F)

Trigger_

Sequence_

Select_33

8:0 WSEQ_DRC1_

SIG_DET_FALL_

INDEX[8:0]

0x1FF DRC1 Signal-Detect (Falling) Write Sequence start index. Contains the index location in

the sequencer memory of the first command in the sequence associated with DRC1

Signal-Detect (Falling) detection.

Valid from 0 to 251 (0x0FB).

Table 4-105. Write Sequencer Control—MICDET Clamp

Bit

Label

Default

Description

R102 (0x0066)

Always_On_Triggers_

Sequence_Select_1

8:0 WSEQ_MICD_

CLAMP_RISE_

INDEX[8:0]

0x1FF MICDET Clamp (Rising) Write Sequence start index. Contains the index location in

the sequencer memory of the first command in the sequence associated with

MICDET clamp (Rising) detection.

Valid from 0 to 251 (0x0FB).

R103 (0x0067)

Always_On_Triggers_

Sequence_Select_2

8:0 WSEQ_MICD_

CLAMP_FALL_

INDEX[8:0]

0x1FF MICDET Clamp (Falling) Write Sequence start index. Contains the index location in

the sequencer memory of the first command in the sequence associated with

MICDET clamp (Falling) detection.

Valid from 0 to 251 (0x0FB).

CS47L35 Datasheet(PDF) 214 Page - Cirrus Logic

CS47L35 Datasheet(HTML) 214 Page - Cirrus Logic

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

Datasheet Download

Link URL