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CS47L35 Datasheet(PDF) 211 Page - Cirrus Logic |
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CS47L35 Datasheet(HTML) 211 Page - Cirrus Logic |
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211 / 300 page  DS1085F3 211 CS47L35 4.18 Control-Write Sequencer Note: The mechanism for queuing multiple sequence requests has limitations when the WSEQ_START bit is used to trigger the write sequencer. If a sequence is initiated using the WSEQ_START bit, no other control sequences should be triggered until the sequence completes. The WSEQ_BUSY bit (described in Table 4-108) provides an indication of the sequencer status and can be used to confirm the sequence has completed. Multiple control sequences triggered by any other method are queued if necessary, and scheduled in turn. The write sequencer can be interrupted by writing 1 to the WSEQ_ABORT bit. Note that this command only aborts a sequence that is currently running; if other sequence commands are pending and not yet started, these sequences are not aborted by writing to the WSEQ_ABORT bit. The write sequencer stores up to 252 register-write commands. These are defined in registers R12288 (0x3000) through R12790 (0x31F6). See Table 4-109 for a description of these registers. Table 4-102. Write Sequencer Control—Initiating a Sequence Register Address Bit Label Default Description R22 (0x0016) Write_Sequencer_ Ctrl_0 11 WSEQ_ABORT 0 Writing 1 to this bit aborts the current sequence. 10 WSEQ_START 0 Writing 1 to this bit starts the write sequencer at the index location selected by WSEQ_ START_INDEX. At the end of the sequence, this bit is reset by the write sequencer. 9 WSEQ_ENA 0 Write Sequencer Enable 0 = Disabled 1 = Enabled Only applies to sequences triggered using the WSEQ_START bit. 8:0 WSEQ_ START_ INDEX[8:0] 0x000 Sequence Start Index. Contains the index location in the sequencer memory of the first command in the selected sequence. Only applies to sequences triggered using the WSEQ_START bit. Valid from 0 to 251 (0x0FB). R66 (0x0042) Spare_Triggers 15 WSEQ_TRG16 0 Write Sequence Trigger 16 Write 1 to trigger 14 WSEQ_TRG15 0 Write Sequence Trigger 15 Write 1 to trigger 13 WSEQ_TRG14 0 Write Sequence Trigger 14 Write 1 to trigger 12 WSEQ_TRG13 0 Write Sequence Trigger 13 Write 1 to trigger 11 WSEQ_TRG12 0 Write Sequence Trigger 12 Write 1 to trigger 10 WSEQ_TRG11 0 Write Sequence Trigger 11 Write 1 to trigger 9 WSEQ_TRG10 0 Write Sequence Trigger 10 Write 1 to trigger 8 WSEQ_TRG9 0 Write Sequence Trigger 9 Write 1 to trigger 7 WSEQ_TRG8 0 Write Sequence Trigger 8 Write 1 to trigger 6 WSEQ_TRG7 0 Write Sequence Trigger 7 Write 1 to trigger 5 WSEQ_TRG6 0 Write Sequence Trigger 6 Write 1 to trigger 4 WSEQ_TRG5 0 Write Sequence Trigger 5 Write 1 to trigger 3 WSEQ_TRG4 0 Write Sequence Trigger 4 Write 1 to trigger 2 WSEQ_TRG3 0 Write Sequence Trigger 3 Write 1 to trigger 1 WSEQ_TRG2 0 Write Sequence Trigger 2 Write 1 to trigger 0 WSEQ_TRG1 0 Write Sequence Trigger 1 Write 1 to trigger |
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