NXP Semiconductors K22F series, Reference Manual, Page: 1351 / 1407

I2Sx_TFRn field descriptions
Field Description
31
Reserved
This field is reserved.
This read-only field is reserved and always has the value 0.
30–20
Reserved
This field is reserved.
This read-only field is reserved and always has the value 0.
19–16
WFP
Write FIFO Pointer
FIFO write pointer for transmit data channel.
15–4
Reserved
This field is reserved.
This read-only field is reserved and always has the value 0.
RFP Read FIFO Pointer
FIFO read pointer for transmit data channel.
49.3.9 SAI Transmit Mask Register (I2Sx_TMR)
This register is double-buffered and updates:
1. When TCSR[TE] is first set
2. At the end of each frame.
This allows the masked words in each frame to change from frame to frame.
Address: 4002_F000h base + 60h offset = 4002_F060h
Bit 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
R
0
TWM
W
Reset
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
I2Sx_TMR field descriptions
Field Description
31–16
Reserved
This field is reserved.
This read-only field is reserved and always has the value 0.
TWM Transmit Word Mask
Configures whether the transmit word is masked (transmit data pin tristated and transmit data not read
from FIFO) for the corresponding word in the frame.
0 Word N is enabled.
1 Word N is masked. The transmit data pins are tri-stated when masked.
Chapter 49 Integrated Interchip Sound (I2S) / Synchronous Audio Interface (SAI)
K22F Sub-Family Reference Manual, Rev. 4, 08/2016
NXP Semiconductors 1351