K60P100M100SF2RM Datasheet, PDF (1700/1809 Pages) Freescale Semiconductor, Inc – K60 Sub-Family Reference Manual

Memory map/register definition
I2Sx_TCR field descriptions (continued)
Field
5
TXDIR
Transmit clock direction
Description
This bit controls the direction and source of the clock signal used to clock the TXSR. Internally generated
clock is output through the STCK port. External clock is taken from this port.
4
TSHFD
0 Transmit clock is external.
1 Transmit clock generated internally
Transmit Shift Direction.
This bit controls whether the MSB or LSB will be transmitted first in a sample.
NOTE: The CODEC device labels the MSB as bit 0, whereas the core labels the LSB as bit 0. Therefore,
when using a standard CODEC, core MSB (CODEC LSB) is shifted in first (TCR[TSHFD]
cleared).
3
TSCKP
0 Data transmitted MSB first.
1 Data transmitted LSB first.
Transmit Clock Polarity.
This bit controls which bit clock edge is used to clock out data for the transmit section.
NOTE: TSCKP is 0 CLKIST = 0; TSCKP is 1CLKIST = 1
2
TFSI
0 Data clocked out on rising edge of bit clock.
1 Data clocked out on falling edge of bit clock.
Transmit Frame Sync Invert.
This bit controls the active state of the frame sync I/O signal for the transmit section of I²S.
1
TFSL
0 Transmit frame sync is active high.
1 Transmit frame sync is active low.
Transmit Frame Sync Length.
This bit controls the length of the frame sync signal to be generated or recognized for the transmit section.
The length of a word-long frame sync is same as the length of the data word selected by WL[3:0].
0
TEFS
0 Transmit frame sync is one-word long.
1 Transmit frame sync is one-clock-bit long.
Transmit Early Frame Sync.
This bit controls when the frame sync is initiated for the transmit section. The frame sync signal is
deasserted after one bit-for-bit length frame sync and after one word-for-word length frame sync. In case
of synchronous operation, the frame sync can also be initiated on receiving the first bit of data.
0 Transmit frame sync initiated as the first bit of data is transmitted.
1 Transmit frame sync is initiated one bit before the data is transmitted.
1700
K60 Sub-Family Reference Manual, Rev. 6, Nov 2011
Freescale Semiconductor, Inc.