Samsung S5PC110 Manual page 1689

S5PC110_UM
10.3.4.5 SPDIF Register (SPDIFIN_CONFIG_1, R/W, Address = 0xFA13_0010)
SPDIFIN_CONFIG_1
-
noise_filter_samples
-
PcPd_value_mode
word_length_value_
mode
Bit
[7] Reserved
[6] 0 = Filtering with three consecutive samples
1 = Filtering with two consecutive samples
Noise filtering is done for over-sampled SPDIF input
signal. This operation will be done as follows:
If 'noise_filter_samples' is 0, three consecutive over-
sampled signals are regarded as high or low only if those
samples are all high or all low respectively. If one or two
samples are low or high for three over-sample duration,
those noise-filtered signals will keep the previous value.
If 'noise_filter_samples' is 1, two consecutive over-
sampled signals are regarded as a high or low only if
those samples are all high or low respectively.
This setting can be used for reduced over-sampling ratio;
recommended over-sampling ratio is 10 (see also
'clk_divisor').
[5] Reserved (Must be '0')
[4] 0 = Automatically sets
1 = Manually sets
If '0' is used for automatic setting, Pc and Pd values are
chosen by value of Pc and Pd from decoded stream
header, as reported in SPDIFIN_Px_INFO.
If you set this register, the receiver will use
SPDIFIN_USER_VALUE[31:16] and
SPDIFIN_USER_VALUE[15:4] values as Pc and Pd
respectively, instead of decoded data from stream header,
as reported in SPDIFIN_Px_INFO.
If the (cf) burst payload length is automatically or manually
set, it affects the data size to be written in memory via
HDMI—by dumping the full sub-frame for last bit in burst
payload length.
For example, if burst payload length is 257-bit, that is, 16
sub-frames * 16-bit + 1-bit, then HDMI will write data in 17
consecutive sub-frames.
[3] 0 = Automatically sets
1 = Manually sets
If '0' is used for automatic setting, the word length value
will be chosen by value of channel status from decoded
SPDIF format, as reported in
SPDIFIN_CH_STATUS_1.word_length.
If user sets this register, the receiver will use
SPDIFIN_USER_VALUE[3:0] value as word length
instead of decoded data from channel status, as reported
in SPDIFIN_CH_STATUS_1.word_length.
10 9BHIGH-DEFINITION MULTIMEDIA INTERFACE
Description Initial State
0
0
0
0
0
10-80