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WM8904ECS/R 数据表(PDF) 168 Page - Wolfson Microelectronics plc |
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WM8904ECS/R 数据表(HTML) 168 Page - Wolfson Microelectronics plc |
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168 / 188 page  WM8904 Pre-Production w PP, Rev 3.3, September 2012 168 REGISTER ADDRESS BIT LABEL DEFAULT DESCRIPTION REFER TO R110 (6Eh) Write Sequencer 2 14 WSEQ_EOS 0 End of Sequence flag. This bit indicates whether the Control Write Sequencer should stop after executing this step. 0 = Not end of sequence 1 = End of sequence (Stop the sequencer after this step). Control Write Sequencer 11:8 WSEQ_DELAY [3:0] 0000 Time delay after executing this step. Total delay time per step (including execution)= 62.5µs × (2^WSEQ_DELAY + 8) Control Write Sequencer 7:0 WSEQ_DATA [7:0] 0000_0000 Data to be written in this sequence step. When the data width is less than 8 bits, then one or more of the MSBs of WSEQ_DATA are ignored. It is recommended that unused bits be set to 0. Control Write Sequencer Register 6Eh Write Sequencer 2 REGISTER ADDRESS BIT LABEL DEFAULT DESCRIPTION REFER TO R111 (6Fh) Write Sequencer 3 9 WSEQ_ABORT 0 Writing a 1 to this bit aborts the current sequence and returns control of the device back to the serial control interface. Control Write Sequencer 8 WSEQ_START 0 Writing a 1 to this bit starts the write sequencer at the memory location indicated by the WSEQ_START_INDEX field. The sequence continues until it reaches an “End of sequence” flag. At the end of the sequence, this bit will be reset by the Write Sequencer. Control Write Sequencer 5:0 WSEQ_START_ INDEX [5:0] 00_0000 Sequence Start Index. This is the memory location of the first command in the selected sequence. 0 to 31 = RAM addresses 32 to 48 = ROM addresses 49 to 63 = Reserved Control Write Sequencer Register 6Fh Write Sequencer 3 REGISTER ADDRESS BIT LABEL DEFAULT DESCRIPTION REFER TO R112 (70h) Write Sequencer 4 9:4 WSEQ_CURRE NT_INDEX [5:0] 00_0000 Sequence Current Index (read only): This is the location of the most recently accessed command in the write sequencer memory. Control Write Sequencer 0 WSEQ_BUSY 0 Sequencer Busy flag (read only): 0 = Sequencer idle 1 = Sequencer busy Note: it is not possible to write to control registers via the control interface while the Sequencer is Busy. Control Write Sequencer Register 70h Write Sequencer 4 |
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