Terasic HDMI-FMC, User Manual

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HDMI-FMC_User_Manual www.terasic.com
August 6, 2019
Notes: Reads of this register return the last value written, so the readback value has meaning only for the channel
most recently configured.
◼
Stream Header Settings for I2S (RW)
Use TPI 0x25[3:0] to select the word length to be indicated to the receiver as shown in Table 3-9.
Table 3-9 Stream Header Settings for I2S (RW)
Offset Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
0x21
[00]
I
2
S Channel Status Byte 0
cbit7 cbit6 cbit5 cbit4 cbit3 cbit2 cbit1 cbit0
0x22
[00]
I
2
S Channel Status Byte 1: Category Code
cbit15 cbit14 cbit13 cbit12 cbit11 cbit10 cbit9 cbit8
0x23
[00]
I
2
S Channel Status Byte 2: Source, Channel Number
I
2
S Channel Number cbit23:20 I
2
S Source Number cbit19:16
0x24
[0F]
I
2
S Channel Status Byte 3: Accuracy, Sampling f
s
Clock Accuracy cbit31:28
Sampling Frequency cbit27:24
0000 – 44.1kHz
1000 – 88.2kHz
1100 – 176.4kHz
0010 – 48kHz
1010 – 96kHz
1110 – 192kHz
0011 – 32kHz
1001 – 768 kHz (HBRA)
0001 – not indicated
0x25
[0B]
I
2
S Channel Status Byte 4: Original f
s
, Sample Length
Original f
s
, Channel Status bits 39:36
Refer to IEC60958 specification
Sample Length, Channel Status bits 35:32
Word Length
1011 – 24 bits (default)
1001 – 23 bits
0101 – 22 bits
1101 – 21 bits
1010 – 20 bits
1000 – 19 bits
0100 – 18 bits