Information

46.3.12 SAI Receive Configuration 2 Register (I2Sx_RCR2)
This register must not be altered when RCSR[RE] is set.
Addresses: I2S0_RCR2 is 4002_F000h base + 88h offset = 4002_F088h
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
SYNC
BCS
BCI
MSEL
BCP
BCD
0
DIV
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_RCR2 field descriptions
Field Description
31–30
SYNC
Synchronous Mode
Configures between asynchronous and synchronous modes of operation. When configured for a
synchronous mode of operation, the transmitter must be configured for asynchronous operation.
00 Asynchronous mode.
01 Synchronous with transmitter.
10 Synchronous with another SAI receiver.
11 Synchronous with another SAI transmitter.
29
BCS
Bit Clock Swap
When the SAI is in asynchronous mode and this field is set to 1, the receiver is clocked by the transmitter
bit clock. When the SAI is in synchronous mode and this field is set to 1, the receiver is clocked by the
receiver bit clock, but it uses the transmitter frame sync.
0 Use the normal bit clock source.
1 Swap the bit clock source.
28
BCI
Bit Clock Input
When set in either asynchronous or synchronous mode and the module is using an internally generated
bit clock, configures the internal logic to be clocked as if the bit clock was externally generated. This has
the effect of decreasing data input setup time, but increasing data output valid time. This bit has no effect
when configured for an externally generated bit clock.
0 No effect.
1 Internal logic is clocked as if bit clock was externally generated.
27–26
MSEL
MCLK Select
Selects the audio master clock used to generate an internally generated bit clock. This field has no effect
when configured for an externally generated bit clock.
00 Bus clock selected.
01 Master clock 1 selected.
10 Master clock 2 selected.
11 Master clock 3 selected.
Table continues on the next page...
Memory map and register definition
K20 Sub-Family Reference Manual, Rev. 2, Feb 2012
1162 Freescale Semiconductor, Inc.