CHAPTER 24:Inter-IC Sound (I2S)
950
S6J3200 Series Hardware Manual Document Number: 002-04852 Rev. *G
Serial transmission control part is in busy state. This bit is not affected by software reset.
Bit
Description
0
Serial transmission control part is in idle state
1
Serial transmission control part is in busy state
[bit17] TXFI : Tx FIFO Empty
When number of empty space of transmission FIFO is greater than the threshold set in
I2Sn_INTCNT:TFTH, this bit is set to "1".
This bit is "1" and I2Sn_INTCNT: interrupt to CPU occurs.
When number of empty slot of transmission FIFO becomes smaller or equal to the threshold by writing
to Transmission FIFO Data Registers from CPU or DMAC, this bit is cleared automatically to "0".
The value also become "0" when I2Sn_OPRREG:START bit is "0" or I2Sn_OPRREG:TXENB bit is "0".
If software reset is performed at I2Sn_OPRREG:START bit = "1" and I2Sn_OPRREG:TXENB bit = "1",
the value becomes "0" during software reset then changes to "1" after the process.
[bit16] RXFI : Rx FIFO Full
When number of reception FIFO data becomes more than the threshold set in I2Sn_INTCNT:RFTH,
this bit is set to "1".
This bit is "1" and I2Sn_INTCNT: interrupt to CPU occurs.
When number of data in reception FIFO becomes smaller or equal to the threshold by reading
Reception FIFO DATA Registers from CPU or DMAC, this bit is automatically cleared to "0".
This bit becomes "0" by software reset.
[bit15:8] TXNUM : Number of Tx FIFO Data
The number of data in transmission FIFO is indicated.
This field is incremented by write access to Transmission FIFO Data Registers and decremented by
serial word transmission.
Max. value of 66 can be displayed in the simultaneous transfer mode and value of 132 in the
transmission only mode.
This field becomes "00000000" by software reset.
[bit7:0] RXNUM : Number of Data in Rx FIFO
The number of data in reception FIFO is indicated.
This field is incremented by word reception from serial bus and decremented by read access to
Reception FIFO Data Registers.
Maximum value of 66 can be displayed in the simultaneous transfer mode and value of 132 in the
reception mode.
This field becomes "00000000" by software reset.
Summary of Contents for S6J3200 Series
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