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NUC970 Technical Reference Manual
Publication Release Date: Dec. 15, 2015
- 572 -
Revision V1.30
NUC97
0
T
E
CHNIC
A
L
RE
F
E
RE
N
CE
MA
NUA
L
I2S Control Register (I2S_CON)
Register
Offset
R/W
Description
Reset Value
I2S_CON
0x028
R/W
I2S Control Register
0x0000_0000
Bits
Description
[31:21]
Reserved
Reserved.
[20]
SLAVE
I
2
S Slave Mode Selection Bit
0 = I
2
S Master mode.
1 = I
2
S Slave mode.
The SLAVE bit is read/write
[19:16]
PRS
I
2
S Frequency PRE_SCALER Selection Bits (FPLL Is the Input PLL Frequency,
MCLK Is the Output Main Clock)
0000 = MCLK=FPLL/1.
0001 = MCLK=FPLL/2.
0010 = MCLK=FPLL/3.
0011 = MCLK=FPLL/4.
0100 = MCLK=FPLL/5.
0101 = MCLK=FPLL/6.
0110 = MCLK=FPLL/7.
0111 = MCLK=FPLL/8.
1000 = RESERVED.
1001 = MCLK=FPLL/10.
1010 = RESERVED.
1011 = MCLK=FPLL/12.
1100 = RESERVED.
1101 = MCLK=FPLL/14.
1110 = RESERVED.
1111 = MCLK=FPLL/16.
(when the division factor is 3/5/7, the duty cycle of MCLK is not 50%, the high duration
is 0.5*FPLL)
The PSR[3:0] bits are read/write
31
30
29
28
27
26
25
24
Reserved
23
22
21
20
19
18
17
16
Reserved
SLAVE
PRS
15
14
13
12
11
10
9
8
Reserved
7
6
5
4
3
2
1
0
BCLK_DIV
MCLK_SEL
FORMAT
Reserved