DS1113F1
77
CS4399
7.3 ASP and XSP Registers
7.3 ASP and XSP Registers
7.2.8
PLL Setting 8
Address 0x3001B
R/W
7
6
5
4
3
2
1
0
—
PLL_MODE
—
Default
0
0
0
1
0
0
1
1
Bits
Name
Description
7:2
—
Reserved
1
PLL_MODE
500/512 factor used in PLL frequency calculation equation,
0 No bypass
1 (Default) Bypass
0
—
Reserved
7.2.9
PLL Setting 9
Address 0x40002
R/W
7
6
5
4
3
2
1
0
—
PLL_REF_PREDIV
Default
0
0
0
0
0
0
1
0
Bits
Name
Description
7:2
—
Reserved
1:0
PLL_REF_
PREDIV
PLL reference divide select.
00 Divide by 1
01 Divide by 2
10 (Default) Divide by 4
11 Divide by 8
7.3.1
CLKOUT Control
Address 0x40004
R/W
7
6
5
4
3
2
1
0
—
CLKOUT_DIV
CLKOUT_SEL
Default
0
0
0
0
0
0
0
0
Bits
Name
Description
7:5
—
Reserved
4:2 CLKOUT_DIV Divider setting on internal MCLK path to CLKOUT.
000 (Default) Divide by 2
001 Divide by 3
010 Divide by 4
011 Divide by 8
100–111 Reserved
1:0 CLKOUT_SEL Select the source of CLKOUT.
00 (Default) XTAL/MCLK path
01 PLL output path
10–11 Reserved
7.3.2
ASP Numerator 1
Address 0x40010
R/W
7
6
5
4
3
2
1
0
ASP_N_LSB
Default
0
0
0
0
0
0
0
1
Bits
Name
Description
7:0
ASP_N_LSB The value in this register cannot be changed while the serial port is powered up.
ASP sample rate fractional divide numerator LSB. Along with ASP_M_MSB/LSB, selects the fractional divide value for
setting the SCLK frequency.
(Default) ASP_N = 1