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DSP56857 Datasheet(PDF) 584 Page - Freescale Semiconductor, Inc |
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DSP56857 Datasheet(HTML) 584 Page - Freescale Semiconductor, Inc |
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584 / 662 page  Application: Date: Programmer: Sheet Appendix B - Programmer’s Sheets, Rev. 4 Freescale Semiconductor B-82 Preliminary 15 of 16 15 - 0 TSMA Transmit Slot Mask A This is a read/write register. In the Network mode, these registers are used by the transmitter to determine which action to take in the current transmission slot. Depending on the setting of the bits, the transmitter either tri-states the transmitter data signal or transmits a data word and generates the appropriate transmit status. TSMA and TSMB can be viewed as a single 32-bit register named TSM. Bit n in TSM (TSMn) is an enable/disable control bit for transmission in slot N. 0 The transmit data signal of the transmitter is tri-stated during transmit time slot N. Data is not transferred to the TXSR, therefore transmit status flags are not changed 1 The transmit sequence proceeds normally. Data is transferred from the STX register (or TXFIFO, if enabled) to the shift register during slot N. Appropriate flags are set 16 - 31 TSMB Transmit Slot Mask B This is a read/write register. In the Network mode, these registers are used by the transmitter to determine which action to take in the current transmission slot. Depending on the setting of the bits, the transmitter either tri-states the transmitter data signal or transmits a data word and generates the appropriate transmit status. TSMA and TSMB can be viewed as a single 32-bit register. 0 The transmit data signal of the transmitter is tri-stated during transmit time slot N. Data is not transferred to the TXSR, therefore transmit status flags are not changed 1 The transmit sequence proceeds normally. Data is transferred from the STX register (or TXFIFO, if enabled) to the shift register during slot N. Appropriate flags are set ESSI Transmit Slot Mask Registers (TSMA, TSMB) ESSI ESSI Transmit Slot Mask Register (TSMB) Base + $D Bits 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 Read TSMB [31:16] Write Reset 1111 1111 1111 1111 ESSI Transmit Slot Mask Register (TSMA) Base + $C Bits 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 Read TSMA [15:0] Write Reset 11111 1111 1111 111 |
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