CS8403A-CS Просмотр технического описания (PDF) - Cirrus Logic

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CS8403A-CS

96 kHz Digital Audio Transmitter

Cirrus Logic 

CS8403A CS8404A

Control Pins

RST - Master Reset, PIN 16.

When low, all internal counters are reset and the line drivers are disabled, pulling low.

V - Validity, PIN 9.

Validity bit serial input port. This bit is defined according to the digital audio standards

wherein V=0 signifies the audio signal is suitable for conversion to analog. V=1 signifies the

audio signal is not suitable for conversion to analog, i.e. invalid. V is sampled once per

subframe

U - User Bit, PIN 11.

User bit serial input port is sampled once per subframe.

PRO - Professional/Consumer Select, PIN 2.

Selects between professional mode (PRO low) and consumer mode (PRO high). This pin

defines the functionality of the next seven pins. PRO must be low for Transparent Mode, but

will have no effect on the channel status bits.

C9/C15 - Channel Status Bit 9 / Channel Status Bit 15, PIN 12.

In professional mode, C9 is the inverse of channel status bit 9 (bit 1 of byte 1). In consumer

mode, C15 is the inverse of channel status bit 15 (bit 7 of byte 1). C9/C15 are ignored in

Transparent Mode.

EM0/C9 - Emphasis 0 / Channel Status Bit 9, PIN 14.

In professional mode, EM0 and EM1 encode channel status bits 2, 3, and 4. In consumer mode,

C9 is the inverse of channel status bit 9 (bit 1 or byte 1). EMO/C9 are ignored in Transparent

Mode.

EM1/C8 - Emphasis 1 / Channel Status Bit 8, PIN 13.

In professional mode, EM0 and EM1 encode channel status bits 2, 3, and 4. In consumer mode,

C8 is the inverse of channel status bit 8 (bit 0 of byte 1). EM1/C8 are ignored in Transparent

Mode.

C7/C3 - Channel Status Bit 7 / Channel Status Bit 3, PIN 1.

In professional mode, C7 is the inverse of channel status bit 7. In consumer mode, C3 is the

inverse of channel status bit 3. C7/C3 are ignored in Transparent Mode.

C6/C2 - Channel Status Bit 6 / Channel Status Bit 2, PIN 4.

In professional mode, C6 is the inverse of channel status bit 6. In consumer mode, C2 is the

inverse of channel status bit 2. C6/C2 are ignored in Transparent Mode.

C1/FC0 - Channel Status Bit 1 / Frequency Control 0, PIN 3.

In professional mode, C1 is the inverse of channel status bit 1. In consumer mode, FC0 and

FC1 are encoded versions of channel status bits 24 and 25 (bits 0 and 1 of byte 3). When FC0

and FC1 are both high, CD mode is selected. C1/FC0 are ignored in Transparent Mode.

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DS239PP1

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