wm8802scft/v Wolfgang Knap, wm8802scft/v Datasheet - Page 17

• Manufacturer Part Number: wm8802scft/v
• Description: Digital Audio Interface Transceiver
• Manufacturer: Wolfgang Knap

Product Preview
w
OUTPUT CLOCKS (RMCK, RBCK, RLRCK, SBCK, SLRCK)
The WM8802 features two clock systems in order to supply the various clocks for the A/D converter,
DSP and other peripheral devices.
The clock output settings for the R and S systems are set using PRSEL[0:1], XRSEL[0:1],
XRBCK[0:1], XRLRCK[0:1], PSBCK[0:1], PSLRCK[0:1], XSBCK[0:1], and XSLRCK[0:1].
(a)
(1)
(2)
(3)
(4)
(5)
(b)
(1)
(2)
(3)
(4)
(5)
The polarity of RBCK, RLRCK, SBCK and SLRCK can be reversed with RBCKP, RLRCKP, SBCKP
and SLRCKP.
Clock switching is processed on the rising edge of the RLRCK output after the falling edge of micro-
controller interface CE.
Table 9 Output Clock Frequencies (Bold Items = Initial Settings)
OUTPUT PIN NAME
RLRCK
SLRCK
RMCK
RBCK
SBCK
Setting range for clock output pins when using the PLL source
RMCK: 1/1, 1/2, and 1/4 of 512fs or 256fs
RBCK: 64fs output
RLRCK: fs output
SBCK: 128fs, 64fs, and 32fs
SLRCK: 2fs, fs, and fs/2
Setting range for clock output pins when using the XIN source
RMCK: 1/1, 1/2, and 1/4 of 12.288MHz or 24.576MHz
RBCK: 12.288MHz, 6.144MHz, and 3.072MHz
SBCK: 12.288MHz, 6.144MHz, and 3.072MHz
RLRCK: 192kHz, 96kHz, and 48kHz
SLRCK: 192kHz, 96kHz, and 48kHz
512fs
256fs
128fs
512fs
PLL SOURCE
256fs
128fs
128fs
256fs
64fs
64fs
64fs
32fs
fs/2
2fs
fs
fs
SOURCE
TMCK
256fs
128fs
256fs
64fs
12.288MHz
12.288MHz 24.576MHz
6.144MHz
3.072MHz
PP Rev 1.1 April 2004
XIN SOURCE
12.288MHz
12.288MHz
6.144MHz
3.072MHz
6.144MHz
3.072MHz
192kHz
192kHz
96kHz
48kHz
96kHz
48kHz
WM8802
24.576MHz
12.288MHz
6.144MHz
17