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STA020 Datasheet(PDF) 3 Page - STMicroelectronics |
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STA020 Datasheet(HTML) 3 Page - STMicroelectronics |
3 / 12 page N. Name Function 8 SDATA Serial Data. Audio data serial input pin. 21, 22,23 M0, M1, M2 Serial Port Mode Select. Selects the format of FSYNC and the sample edge of SCK with respect to SDATA. Control Pins 1 C7/C3 Channel Status Bit 7/Channel Status Bit 3. 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. 2 PRO Professional/Consumer Select. Selects between professional mode (PRO low) and consumer mode (PRO high). This pin defines the functionality of the channel status parallel pins. PRO is ignored in Transparent Mode. 3 C1/FC0 Channel Status Bit 1/Frequency Control 0. 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. 4 C6/C2 Channel Status Bit 6/Channel Status Bit 2. 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. 9 V Validity. Validity bit serial input port. This bit is defined as per 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. 10 C/SBF Channel Status Serial Input/Subcode Frame Clock. In professional and consumer modes this pin is the channel status serial input port. In CD mode this pin inputs the CD subcode frame clock. 11 U User Bit. User bit serial input port. 12 C9/C15 Channel Status Bit 9/Channel Status Bit 15. 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. 13 EM1/C8 Emphasis 1/Channel Status Bit 8. 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. 14 EM0/C9 Emphasis 0/Channel Status Bit 9. 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 of byte 1). EM0/C9 are ignored in Transparent Mode. 15 CBL/SBC Channel Status Block Output/Subcode Bit Clock. In professional and consumer modes, the channel status block output is high for the first 15 bytes of channel status. In CD mode, this pin outputs the subcode bit clock. 16 RST Master Reset. When low, all internal counters are reset. 24 TRNPT/FC1 Transparent Mode/Frequency Control 1. In professional mode, setting TRNPT low selects normal operation & CBL is an output. Setting TRNPT high, allows the STA020 to be connected directly to an STA120. In transparent mode, CBL is an input & MCK must be at 256 Fs. In consumer mode, FC0 and FC1 are encoded versions of channel status bits 24 and 25. When FC0 and FC1 are both high, CD mode is selected. Transmitter Interface 5 MCK Master Clock. Clock input at 128x the sample frequency which defines the transmit timing. In trasparent mode MCK must be 256 Fs. 20, 17 TXP, TXN Differential Line Drivers. PINS DESCRIPTION (continued) STA020 3/12 |
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