CS47L35 datasheet(215/300 Pages) CIRRUS

215 / 300 page

DS1085F3

215

CS47L35

4.18 Control-Write Sequencer

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

The event logger control sequences are undefined following power-on reset, a hardware reset, or a Sleep Mode transition.

The event logger 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 4.5.2 for further details of the event loggers.

4.18.6 Boot Sequence

The CS47L35 executes a boot sequence following power-on reset, hardware reset, software reset, or wake-up from Sleep

Mode. The boot sequence configures the CS47L35 with factory-set trim (calibration) data. See Section 4.22 and

Section 4.23 for further details.

The start index location of the boot sequence is 224 (0x0E0). See Table 4-111 for details of the write sequencer memory

allocation.

The boot sequence can be commanded at any time by writing 1 to the WSEQ_BOOT_START bit.

4.18.7 Sequencer Status Indication

The status of the write sequencer can be read using WSEQ_BUSY and WSEQ_CURRENT_INDEX, as described in

Table 4-108. When the WSEQ_BUSY bit is asserted, this indicates that the write sequencer is busy.

The index address of the most recent write sequencer command can be read from the WSEQ_CURRENT_INDEX field.

This can be used to provide a precise indication of the write sequencer progress.

Table 4-106. Write Sequencer Control—Event Loggers

Label

Default

Description

R120 (0x0078)

Eventlog_

Sequence_

Select_1

8:0 WSEQ_

EVENTLOG1_

INDEX[8:0]

0x1FF Event Log 1 Write Sequence start index. Contains the index location in the sequencer

memory of the first command in the sequence associated with Event Log 1 FIFO

Not-Empty detection.

Valid from 0 to 251 (0x0FB).

R121 (0x0079)

Eventlog_

Sequence_

Select_2

8:0 WSEQ_

EVENTLOG2_

INDEX[8:0]

0x1FF Event Log 2 Write Sequence start index. Contains the index location in the sequencer

memory of the first command in the sequence associated with Event Log 2 FIFO

Not-Empty detection.

Valid from 0 to 251 (0x0FB).

R122 (0x007A)

Eventlog_

Sequence_

Select_3

8:0 WSEQ_

EVENTLOG3_

INDEX[8:0]

0x1FF Event Log 3 Write Sequence start index. Contains the index location in the sequencer

memory of the first command in the sequence associated with Event Log 3 FIFO

Not-Empty detection.

Valid from 0 to 251 (0x0FB).

R123 (0x007B)

Eventlog_

Sequence_

Select_4

8:0 WSEQ_

EVENTLOG4_

INDEX[8:0]

0x1FF Event Log 4 Write Sequence start index. Contains the index location in the sequencer

memory of the first command in the sequence associated with Event Log 4 FIFO

Not-Empty detection.

Valid from 0 to 251 (0x0FB).

Table 4-107. Write Sequencer Control—Boot Sequence

Bit

Label

Default

Description

R24 (0x0018)

Write_Sequencer_

Ctrl_2

WSEQ_BOOT_

START

Writing 1 to this bit starts the write sequencer at the index location configured for

the Boot Sequence.

The Boot Sequence start index is 224 (0x0E0).

Table 4-108. Write Sequencer Control—Status Indication

Label

Default

Description

R23 (0x0017)

Write_Sequencer_

Ctrl_1

9 WSEQ_BUSY

(read only)

Sequencer Busy flag (Read Only).

0 = Sequencer idle

1 = Sequencer busy

8:0 WSEQ_CURRENT_

INDEX[8:0]

(read only)

0x000 Sequence Current Index. This indicates the memory location of the most recently

accessed command in the write sequencer memory.

Coding is the same as WSEQ_START_INDEX.

CS47L35 Datasheet(PDF) 215 Page - Cirrus Logic

CS47L35 Datasheet(HTML) 215 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