WM8903LGEFK/RV Wolfson Microelectronics, WM8903LGEFK/RV Datasheet - Page 102

• Manufacturer Part Number: WM8903LGEFK/RV
• Description: Audio CODECs ULTRA LOW PWR HI FI CODEC
• Manufacturer: Wolfson Microelectronics

Specifications of WM8903LGEFK/RV

• Audio Codec Type: Stereo Codec
• No. Of Adcs: 2
• No. Of Dacs: 2
• No. Of Input Channels: 6
• No. Of Output Channels: 8
• Adc / Dac Resolution: 24bit
• Sampling Rate: 96kHz
• Operating Temperature Range: -40°C To +85°C
• Rohs Compliant: Yes
• Adcs / Dacs Signal To Noise Ratio: 96dB
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

WM8903
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WSEQ_DATA_START is a 4-bit field which identifies the LSB position within the selected Control
Register to which the data should be written. Setting WSEQ_DATA_START = 0100 will cause 1-bit
data to be written to bit 4. With this setting, 4-bit data would be written to bits 7:4 and so on.
WSEQ_DATA_WIDTH is a 3-bit field which identifies the width of the data block to be written. This
enables selected portions of a Control Register to be updated without any concern for other bits
within the same register, eliminating the need for read-modify-write procedures. Values of 0 to 7
correspond to data widths of 1 to 8 respectively. For example, setting WSEQ_DATA_WIDTH = 010
will cause a 3-bit data block to be written. Note that the maximum value of this field corresponds to
an 8-bit data block; writing to register fields greater than 8 bits wide must be performed using two
separate operations of the Control Write Sequencer.
WSEQ_DATA is an 8-bit field which contains the data to be written to the selected Control Register.
The WSEQ_DATA_WIDTH field determines how many of these bits are written to the selected
register; the most significant bits (above the number indicated by WSEQ_DATA_WIDTH) are
ignored.
WSEQ_DELAY is a 4-bit field which controls the waiting time between the current step and the next
step in the sequence. The total delay time per step (including execution) is given by:
This gives a useful range of execution/delay times from 562μs up to 2.048s per step.
WSEQ_EOS is a 1-bit field which indicates the End of Sequence. If this bit is set, then the Control
Write Sequencer will automatically stop after this step has been executed.
T = k × (2
where k = 62.5μs (under recommended operating conditions)
WSEQ_DELAY
+ 8)
PP, Rev 3.1, August 2009
Pre-Production
102