NXP Semiconductors K22F series User Manual

I2Sx_MCR field descriptions (continued)
Field Description
0 MCLK divider ratio is not being updated currently.
1 MCLK divider ratio is updating on-the-fly. Further updates to the MCLK divider ratio are blocked while
this flag remains set.
30
MOE
MCLK Output Enable
Enables the MCLK divider and configures the MCLK signal pin as an output. When software clears this
field, it remains set until the MCLK divider is fully disabled.
0 MCLK signal pin is configured as an input that bypasses the MCLK divider.
1 MCLK signal pin is configured as an output from the MCLK divider and the MCLK divider is enabled.
29–26
Reserved
This field is reserved.
This read-only field is reserved and always has the value 0.
25–24
MICS
MCLK Input Clock Select
Selects the clock input to the MCLK divider. This field cannot be changed while the MCLK divider is
enabled. See the chip-specific information for the connections to these inputs.
00 MCLK divider input clock 0 is selected.
01 MCLK divider input clock 1 is selected.
10 MCLK divider input clock 2 is selected.
11 MCLK divider input clock 3 is selected.
Reserved This field is reserved.
This read-only field is reserved and always has the value 0.
49.3.20 SAI MCLK Divide Register (I2Sx_MDR)
The MCLK Divide Register (MDR) configures the MCLK divide ratio. Although the
MDR can be changed when the MCLK divider clock is enabled, additional writes to the
MDR are blocked while MCR[DUF] is set. Writes to the MDR when the MCLK divided
clock is disabled do not set MCR[DUF].
Address:
4002_F000h base + 104h offset = 4002_F104h
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
FRACT DIVIDE
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_MDR field descriptions
Field Description
31–20
Reserved
This field is reserved.
This read-only field is reserved and always has the value 0.
19–12
FRACT
MCLK Fraction
Sets the MCLK divide ratio such that: MCLK output = MCLK input * ( (FRACT + 1) / (DIVIDE + 1) ).
FRACT must be set equal or less than the value in the DIVIDE field.
Table continues on the next page...
Chapter 49 Integrated Interchip Sound (I2S) / Synchronous Audio Interface (SAI)
K22F Sub-Family Reference Manual, Rev. 4, 08/2016
NXP Semiconductors 1363

NXP Semiconductors K22F series Specifications

General

Brand	NXP Semiconductors
Model	K22F series
Category	Controller
Language	English