BL702/704/706 Reference Manual
Bits
Name Type Reset Description
25 OFSEN R/W 1’b0 Offset enable
1’b0: Disabled, 1’b1: Enabled
24:20 OFSCNT R/W 5’d0 Offset cycle count (unit: cycle of I2S BCLK)
5’d0: 1 cycle
5’d1: 2 cycles
…
19 MONORCH R/W 1’b0 RX mono mode channel select signal
1’b0: L-channel
1’b1: R-channel
18 ENDIAN R/W 1’b0 Data endian (bit reverse)
1’b0: MSB goes out first, 1’b1: LSB goes out first
17:16 MODE R/W 2’d0 2’d0: Left-Justified, 2’d1: Right-Justified, 2’d2: DSP, 2’d3:
Reserved
15:14 DATASIZE R/W 2’d1 Data bit width of each channel
2’d0: 8, 2’d1: 16, 2’d2: 24, 2’d3: 32 (bits)
13:12 FRAMSIZE R/W 2’d1 Frame size of each channel
2’d0: 8, 2’d1: 16, 2’d2: 24, 2’d3: 32 (cycles)
11:9 RSVD
8 FSCHMODE R/W 1’b0 1’b0: FS 2-channel mode, 1’b1: FS 3-channel mode (DSP
mode only)
Note: cr_fs_3ch_mode & cr_fs_4ch_mode should NOT be
enabled at the same time
Note: cr_mono_mode & cr_fifo_lr_merge will be invalid in
3-channel mode
Note: When 3-channel mode is enabled, frame_size must
equal data_size
7 FS4C R/W 1’b0 1’b0: FS 2-channel mode, 1’b1: FS 4-channel mode (DSP
mode only)
Note: cr_fs_3ch_mode & cr_fs_4ch_mode should NOT be
enabled at the same time
Note: When 4-channel mode is enabled, frame_size must
equal data_size
6 FS1T R/W 1’b0 1’b0: FS high/low is even, 1’b1: FS only asserts for 1 cycle
5 MUTE R/W 1’b0 1’b0: Normal mode, 1’b1: Mute mode
4 MONO R/W 1’b0 1’b0: Stereo mode, 1’b1: Mono mode
Note: csr_mono_mode & csr_fifo_lr_merge should NOT be
enabled at the same time
3 RXDEN R/W 1’b0 Enable signal of I2S RXD signal
BL702/704/706 Reference Manual 283/ 375
@2021 Bouffalo Lab
To Next Page
Loading...