CHAPTER 24:Inter-IC Sound (I2S)
S6J3200 Series Hardware Manual Document Number: 002-04852 Rev. *G
949
Writing "1" from CPU clears the value to "0".
This bit becomes "0" by software reset.
[bit25] RXUDR : Rx FIFO Underflow Error
When reception FIFO underflows, the value is set to "1" indicating read access is carried out to
reception FIFO in the condition that reception FIFO is empty.
When RXUDR is "1" and I2Sn_INTCNT:RXUDM is "0", interrupt to the CPU occurs. Writing "1" from
CPU clears the value to "0".
This bit becomes "0" by software reset.
Note:
−
This flag is not set when the DAP controller reads the Reception FIFO Data Registers while the
reception FIFO is empty.
[bit24] RXOVR : Rx FIFO Overflow Error
When reception FIFO overflows, the value is set to "1" indicating reception is carried out in the
condition that reception FIFO is full. The value "1" indicates 1 word or more of reception data is ignored.
When RXOVR is "1" and I2Sn_INTCNT:RXOVM is "0", interrupt to CPU occurs.
Writing "1" from CPU clears the value to "0".
This bit becomes "0" by software reset.
[bit23:20] read0 : -
[bit19] EOPI : Interrupt Flag for Rx Timer
This is an interrupt flag that is triggered when an internal reception timer times out. The reception timer
is enabled when following conditions are met at the same time:
I2Sn_CNTREG:RXDIS is set to "0".
I2Sn_OPRREG:START bit is set to "1" and I2Sn_OPRREG:RXENB = "1".
After the reset, operation starts with the 1st word reception.
The count value is automatically cleared if reception FIFO data is more than threshold or it becomes
empty. When the reception FIFO is not empty and the number of data is less than or equal to the
threshold, the reception timer is incremented with each internal clock cycle.
EOPI is set to "1" when reception FIFO is non-empty and reception timer count value reaches timeout
set by I2Sn_INTCNT:RPTMR.
When EOPI is "1" and I2Sn_INTCNT:EOPM is "0", interrupt to CPU occurs.
Writing "1" from CPU clears the value to "0".
This bit becomes "0" by software reset.
[bit18] BSY : Serial Tx Busy
Содержание S6J3200 Series
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