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SN250 Datasheet(PDF) 62 Page - STMicroelectronics |
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SN250 Datasheet(HTML) 62 Page - STMicroelectronics |
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62 / 130 page  Functional description—application modules SN250 62/130 SC1_RXCNTA [0x4490] SC1_RXCNTB [0x4492] SC1_TXCNT [0x4494] 15 0-R 14 0-R 13 0-R 12 0-R 11 0-R 10 0-R 9 0-R 8 0-R 0 0 0 SC1_RXCNTA SC1_RXCNTA 0-R 7 0-R 6 0-R 5 0-R 4 0-R 3 0-R 2 0-R 1 0-R 0 SC1_RXCNTA [12:0] A byte offset (from 0) which points to the location in DMA receive buffer A where the next byte will be placed. When the buffer fills and subsequently unloads, this register wraps around and holds the value zero (pointing back to the first location in the buffer). 15 0-R 14 0-R 13 0-R 12 0-R 11 0-R 10 0-R 9 0-R 8 0-R 0 0 0 SC1_RXCNTB SC1_RXCNTB 0-R 7 0-R 6 0-R 5 0-R 4 0-R 3 0-R 2 0-R 1 0-R 0 SC1_RXCNTB [12:0] A byte offset (from 0) which points to the location in DMA receive buffer B where the next byte will be placed. When the buffer fills and subsequently unloads, this register wraps around and holds the value zero (pointing back to the first location in the buffer). 15 0-R 14 0-R 13 0-R 12 0-R 11 0-R 10 0-R 9 0-R 8 0-R 0 0 0 SC1_TXCNT SC1_TXCNT 0-R 7 0-R 6 0-R 5 0-R 4 0-R 3 0-R 2 0-R 1 0-R 0 SC1_TXCNT [12:0] A byte offset (from 0) which points to the location in the active (loaded) DMA transmit buffer where the next byte will be placed. When the buffer fills and subsequently unloads, this register wraps around and holds the value zero (pointing back to the first location in the buffer). |
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