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 | PM5349  | 
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| DATASHEET | 
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| ISSUE 6 | 
 | SATURN USER NETWORK INTERFACE  | 
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| Pin Name | Type | Pin | Function | 
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| TPRTY | Input | H22 | UTOPIA Transmit bus parity (TPRTY) signal. | 
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 | The transmit parity (TPRTY) signal indicates the | 
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 | parity of the TDAT[15:0] bus. A parity error is | 
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 | indicated by a status bit and a maskable interrupt. | 
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 | Cells with parity errors are inserted in the transmit | 
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 | stream, so the TPRTY input may be unused. Odd or | 
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 | even parity selection is made independently for | 
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 | each channel using the RXPTYP register bit. | 
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 | TPRTY is considered valid only when TENB is | 
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 | simultaneously asserted and the  | 
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 | selected via TADR[4:0]. | 
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 | TPRTY is sampled on the rising edge of TFCLK. | 
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| TSOC | Input | J21 | UTOPIA Transmit Start of Cell (TSOC) signal. | 
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 | The transmit start of cell (TSOC) signal marks the | 
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 | start of cell on the TDAT bus. When TSOC is high, | 
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 | the first word of the cell structure is present on the | 
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 | TDAT bus. It is not necessary for TSOC to be | 
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 | present for each cell. An interrupt may be | 
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 | generated if TSOC is high during any word other | 
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 | than the first word of the cell structure. | 
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 | TSOC is considered valid only when TENB is | 
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 | simultaneously asserted and the  | 
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 | selected via TADR[4:0]. | 
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 | TSOC is sampled on the rising edge of TFCLK. | 
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| Proprietary and Confidential to  | 16 | 
