Information

46.3.5 SAI Transmit Configuration 4 Register (I2Sx_TCR4)
This register must not be altered when TCSR[TE] is set.
Addresses: I2S0_TCR4 is 4002_F000h base + 10h offset = 4002_F010h
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
FRSZ
0
SYWD
0
MF
FSE
0
FSP
FSD
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_TCR4 field descriptions
Field Description
31–20
Reserved
This read-only field is reserved and always has the value zero.
19–16
FRSZ
Frame Size
Configures the number of words in each frame. The value written should be one less than the number of
words in the frame (for example, write 0 for one word per frame). The maximum supported frame size is
16 words.
15–13
Reserved
This read-only field is reserved and always has the value zero.
12–8
SYWD
Sync Width
Configures the length of the frame sync in number of bit clocks. The value written must be one less than
the number of bit clocks. For example, write 0 for the frame sync to assert for one bit clock only. The sync
width cannot be configured longer than the first word of the frame.
7–5
Reserved
This read-only field is reserved and always has the value zero.
4
MF
MSB First
Specifies whether the LSB or the MSB is transmitted/received first.
0 LSB is transmitted/received first.
1 MSB is transmitted/received first.
3
FSE
Frame Sync Early
0 Frame sync asserts with the first bit of the frame.
1 Frame sync asserts one bit before the first bit of the frame.
2
Reserved
This read-only field is reserved and always has the value zero.
1
FSP
Frame Sync Polarity
Configures the polarity of the frame sync.
0 Frame sync is active high.
1 Frame sync is active low.
Table continues on the next page...
Chapter 46 Synchronous Audio Interface (SAI)
K20 Sub-Family Reference Manual, Rev. 2, Feb 2012
Freescale Semiconductor, Inc. 1155