WM8978 Wolfson Microelectronics Ltd., WM8978 Datasheet - Page 74

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WM8978

Manufacturer Part Number
WM8978
Description
The WM8978 is a low power, high quality stereo codec designed for portable applications such as Digital still camera or Digital Camcorde
Manufacturer
Wolfson Microelectronics Ltd.
Datasheet

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WM8978
Table 56 PLL Frequency Examples
GENERAL PURPOSE INPUT/OUTPUT
w
MCLK
(MHZ)
19.68
19.68
14.4
14.4
19.2
19.2
19.8
19.8
(F1)
12
12
13
13
24
24
26
26
27
27
DESIRED
OUTPUT
12.288
12.288
12.288
12.288
12.288
12.288
12.288
12.288
12.288
(MHZ)
11.29
11.29
11.29
11.29
11.29
11.29
11.29
11.29
11.29
The WM8978 has three dual purpose input/output pins.
The GPIO2 and GPIO3 functions are provided for use as jack detection inputs.
The GPIO1 function is provided for use as a jack detection input or a general purpose output.
The default configuration for the CSB/GPIO1 pin is to be an input.
When setup as an input, the CSB/GPIO1 pin can either be used as CSB or for jack detection,
depending on how the MODE pin is set.
Table 49 illustrates the functionality of the GPIO1 pin when used as a general purpose output.
90.3168
90.3168
90.3168
90.3168
90.3168
90.3168
90.3168
90.3168
90.3168
98.304
98.304
98.304
98.304
98.304
98.304
98.304
98.304
98.304
(MHZ)
CSB/GPIO1: CSB / GPIO pin
L2/GPIO2: Left channel line input / headphone detection input
R2/GPIO3: Right channel line input / headphone detection input
F2
PRESCALE
DIVIDE
1
1
1
1
1
1
2
2
2
2
2
2
2
2
2
2
2
2
POSTSCALE
DIVIDE
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
6.947446
7.561846
6.826667
9.178537
9.990243
9.122909
9.929697
6.947446
7.561846
6.690133
7.281778
7.5264
7.5264
8.192
6.272
9.408
10.24
8.192
R
PTD Rev 2.6 November 2005
Preliminary Technical Data
(HEX)
A
7
8
6
7
6
6
9
9
9
9
9
7
8
6
7
6
7
N
BOAC93
F28BD4
45A1CA
D3A06E
EE009E
F28BD4
86C226
8FD525
6872AF
3D70A3
2DB492
FD809F
86C226
8FD525
3126E8
1F76F7
3126E8
482296
(HEX)
K
74