30 DS580F6
CS8406
SFMT0
SFMT1
4
5
Serial Audio Data Format Select (Input) - Selects the serial audio input port format. See Table 3 on
page 28.
APMS 10
Serial Audio Data Port Master/Slave Select (Input) - APMS should be connected to VL to set serial
audio input port as a master or connected to GND to set the port as a slave.
HWCK0
HWCK1
20
27
OMCK Clock Ratio Select (Input) - Selects the ratio of OMCK to the input sample rate (Fs). A pull-up to
VL or pull-down to GND is required to set the appropriate mode. See Table 4 on page 28.
TCBLD 11
Transmit Channel Status Block Direction (Input) - Connect TCBLD to VL to set TCBL as an output.
Connect TCBLD to GND to set TCBL as an input.
TCBL 15
Transmit Channel Status Block Start (Input/Output) - When operated as output, TCBL is high during
the first sub-frame of a transmitted channel status block, and low at all other times. When operated as
input, driving TCBL high for at least three OMCK clocks will cause the next transmitted sub-frame to be
the start of a channel status block.
CEN 16
C Bit Enable (Input) - Determines how the channel status data bits are input. When CEN is low, Hard-
ware Mode A is selected, where the COPY/C, ORIG, EMPH
and AUDIO pins are used to enter selected
channel status data. When CEN is high, Hardware Mode B is selected, where the COPY/C pin is used
to enter serial channel status data.
V 17
Validity Bit (Input) - In Hardware Modes A and B, the V pin input determines the state of the validity bit
in the outgoing AES3 transmitted data. This pin is sampled on both edges of the ILRCK.
U 18
User Data Bit (Input) - In Hardware Modes A and B, the U pin input determines the state of the user
data bit in the outgoing AES3 transmitted data. This pin is sampled on both edges of the ILRCK.
COPY/C 1
COPY Channel Status Bit/C Bit (Input) - In Hardware Mode A (CEN = 0), the COPY/C and ORIG pins
determine the state of the Copyright, Pro, and L Channel Status bits in the outgoing AES3 data stream,
see Table 2 on page 28. In Hardware Mode B, the COPY/C pin becomes the direct C bit input data pin,
which is sampled on both edges of LRCK.
EMPH
3
Pre-Emphasis Indicator (Input) - In Hardware Mode A (CEN = 0), the EMPH
pin low sets the 3 empha-
sis channel status bits to indicate 50/15 s pre-emphasis of the transmitted audio data. If EMPH
is high,
then the three EMPH channel status bits are set to 000, indicating no pre-emphasis.
AUDIO
19
Audio Channel Status Bit (Input) - In Hardware Mode A (CEN = 0), the AUDIO
pin determines the
state of the audio/non audio Channel Status bit in the outgoing AES3 data stream.
ORIG 28
ORIG Channel Status Bit Control (Input) - In Hardware Mode A (CEN = 0), the ORIG and COPY/C
pins determine the state of the Copyright, Pro, and L Channel Status bits in the outgoing AES3 data
stream, see Table 2 on page 28.
TEST
2
7
8
Test Pins (Input) - These pins are unused inputs. It is recommended that these pins be tied to a supply
(VL or GND) to minimize leakage current. The CS8406 will operate correctly if these pins are left float-
ing, however current consumption from VL will increase by 25 A per TEST pin that is left floating.
