APPOTECH CW6632B, User Manual

Page: 124 / 133

118 16.3 Operation Guide
CW6632B Bluetooth 3.0 Audio Player SOC Version 1.0.0
Copyright ©2015, www.appotech.com. All Rights Reserved.
Default 1 1 1 1 1 1 1 1
Access RO RO RO RO RO RO RO RO
IIS_DMA_RD_P_CNT0-1 : During the process of dma, we can know how many datas have been already read from
the memory by reading these two registers.
IIS_DMA_RD_P_CNT0 is the lower bits and IIS_DMA_RD_P_CNT1 is the higher bits
Register 16
–17 IIS_DMA_WR_P_CNT0-1:
Position 7 6 5 4 3 2 1 0
Name IIS_DMA_WR_P_CNT
Default 1 1 1 1 1 1 1 1
Access RO RO RO RO RO RO RO RO
IIS_DMA_WR_P_CNT0-1 : During the process of dma, we can know how many datas have been already written to
memory by reading these two registers.
IIS_DMA_WR_P_CNT0 is the lower bits and IIS_DMA_WR_P_CNT1 is the higher bits
16.3
Operation Guide
16.3.1 CPU RD/WR

For 2-wire data mode,set IO direction,1-wire Data input/output hardware auto control
configure other IO direction. Such as WS,BCLK,REFCLK(if need)

if master mode,set BAUDRATE, IIS_BCLK_CFG,set IIS_VALBIT ,IIS_ALLBIT for different bits transfer

write IIS_CON0-1 for Slave mode, sample edge, LTHWS,CH_SEL,DATA_FMT,TXRX_MOD,OP_MOD,IIS_IE
setting.

enable IIS_EN kick start RX/TX or both
For data receive
，
if both left and right channel data available, then hardware will halt until left channel is
coming.
So if first receive right channel data ,hardware will ignore it.

Write IIS_DAT0 8 times to send data out

wait TX_BUF_EMPTY = 1,then write another 2 data to send ,if tx

wait IIS_PND = 1,when rx mode,then read IIS_DAT0-7 out
16.3.2 loop
this IIS support loop operation mode.that is send out data come from RX pin. And the tx data will delay 2-4 sample
before really data come out.and the first 2-4 sample being send out is all 0s.must config OP_MOD=2
‟b11;