CS8415A Cirrus Logic, CS8415A Datasheet - Page 33
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CS8415A
Manufacturer Part Number
CS8415A
Description
96 kHz DIGITAL AUDIO INTERFACE RECEIVER
Manufacturer
Cirrus Logic
Datasheet
1.CS8415A.pdf
(42 pages)
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11. PIN DESCRIPTION - HARDWARE MODE
DS470PP3
COPY
VL2+
VL+
VL3+
EMPH
RXP0
RXN0
VA+
AGND
FILT
RST
RMCK
RERR
23
27
10
11
1
2
3
4
5
6
7
8
9
COPY Channel Status Bit (Output)
ing AES3 data stream. If the category code is set to General, copyright will be indicated whatever the
state of the Copyright bit.
Positive Digital Power (Input) - Typically +3 to +5V.
Pre-Emphasis (Output) - EMPH is low when the incoming Channel Status data indicates 50/15 µs pre-
emphasis. EMPH is high when the Channel Status data indicates no pre-emphasis or indicates pre-
emphasis other than 50/15 µs. This is also a start-up option pin, and requires a 47 kΩ resistor to either
VL+ or DGND, which determines the AD2 address bit for the control port in Two-Wire mode.
AES3/SPDIF Receiver Port (Input) - Differential line receiver inputs for the AES3 biphase encoded data.
See Appendix A for recommended circuits.
Positive Analog Power (Input) - Nominally +5 V. This supply should be as quiet as possible since noise
on this pin will directly affect the jitter performance of the recovered clock.
Analog Ground (Input) - Ground for the analog circuitry in the chip. AGND and DGND should be con-
nected to a common ground area under the chip.
PLL Loop Filter (Output) - An RC network should be connected between this pin and ground. Recom-
mended schematic and component values are given in Figure 5 and Table 1, respectively. Application
note AN159 provides additional information about the PLL.
Reset (Input) - When RST is low, the CS8415A enters a low power mode and all internal states are
reset. On initial power up, RST must be held low until the power supply is stable, and all input clocks are
stable in frequency and phase. This is particularly true in hardware mode with multiple CS8415A devices
where synchronization between devices is important.
Recovered Master Clock (Input/Output) - Recovered master clock output when PLL is locked to the
incoming AES3 stream. Frequency is 256x the sample rate (Fs).
Receiver Error (Output) - When high, indicates an error condition in the AES3 receiver. The status of
this pin is updated once per sub-frame of incoming AES3 data. Conditions that can cause RERR to go
high are: validity bit high, parity error, bi-phase coding error, and loss of lock by the PLL.
-
Reflects the state of the Copyright Channel Status bit in the incom-
CS8415A
33