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DSP56857 Datasheet(PDF) 642 Page - Freescale Semiconductor, Inc |
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DSP56857 Datasheet(HTML) 642 Page - Freescale Semiconductor, Inc |
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642 / 662 page  Application: Date: Programmer: Sheet Appendix B - Programmer’s Sheets, Rev. 4 Freescale Semiconductor B-140 Preliminary HI8 HI8 Receive Data Register (HRX) Bits Name Description 15 - 0 HRX HI8 Receive Data Register The read-only HI8 Receive Data (HRX) register is used for Host-to-DSC data transfers. The HRX register is loaded with 16-bit data from the transmit data registers TXH/TXL on the Host Side when both the transmit data register empty TXDE on the Host Side, and DSC Host Receive Data Full (HRDF) bits are cleared. This transfer operation sets TXDE and HRDF bits. The HRX register contains valid data when the HRDF bit is set. Reading HRX clears HRDF. The DSC may program the HRIE bit to cause a Host Receive Data interrupt when HRDF is set. 4 of 10 HI8 Receive Data Register (HRX) $1FFFD8 + $2 Bits 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 Read HIGH BYTE (FROM HTX) LOW BYTE (FROM LTX) Write Reset 0 00 000 00 00 00 00 00 denotes Reserved Bits |
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