Motorola DSP56012 User Manual
Page 5
Motorola
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HCR HI Transmit Interrupt Enable (HTIE)—Bit 1 . 4-15
HCR HI Command Interrupt Enable (HCIE)—Bit 2 4-15
HCR HI Flag 2 (HF2)—Bit 3 . . . . . . . . . . . . . . . . . 4-15
HCR HI Flag 3 (HF3)—Bit 4 . . . . . . . . . . . . . . . . . 4-15
HCR Reserved—Bits 5, 6, and 7. . . . . . . . . . . . . . 4-16
HI Status Register (HSR). . . . . . . . . . . . . . . . . . . . . . 4-16
HSR HI Receive Data Full (HRDF)—Bit 0. . . . . . . 4-16
HSR HI Transmit Data Empty (HTDE)—Bit 1 . . . . 4-16
HSR HI Command Pending (HCP)—Bit 2. . . . . . . 4-17
HSR HI Flag 0 (HF0)—Bit 3 . . . . . . . . . . . . . . . . . 4-17
HSR HI Flag 1 (HF1)—Bit 4 . . . . . . . . . . . . . . . . . 4-17
HSR Reserved—Bits 5 and 6 . . . . . . . . . . . . . . . . 4-18
HSR DMA Status (DMA)—Bit 7 . . . . . . . . . . . . . . 4-18
HI Receive Data Register (HORX). . . . . . . . . . . . . . . 4-18
HI Transmit Data Register (HOTX) . . . . . . . . . . . . . . 4-19
Register Contents After Reset . . . . . . . . . . . . . . . . . . 4-19
DSP Interrupts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-20
HI Usage Considerations—DSP Side . . . . . . . . . . . . 4-21
HI—Host Processor Viewpoint . . . . . . . . . . . . . . . . . . . . 4-21
Programming Model—Host Processor Viewpoint . . . 4-21
Host Command . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-22
Interrupt Control Register (ICR) . . . . . . . . . . . . . . . . . 4-24
ICR Receive Request Enable (RREQ)—Bit 0 . . . . 4-24
ICR Transmit Request Enable (TREQ)—Bit 1 . . . 4-24
ICR Reserved—Bit 2 . . . . . . . . . . . . . . . . . . . . . . . 4-25
ICR HI Flag 0 (HF0)—Bit 3 . . . . . . . . . . . . . . . . . . 4-25
ICR HI Flag 1 (HF1)—Bit 4 . . . . . . . . . . . . . . . . . . 4-26
ICR HI Mode Control (HM1 and HM0)—Bits 5 and 64-26
ICR Initialize Bit (INIT)—Bit 7 . . . . . . . . . . . . . . . . 4-27
HI Initialization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-27
Command Vector Register (CVR) . . . . . . . . . . . . . . . 4-29
CVR HI Vector (HV)—Bits 0–5 . . . . . . . . . . . . . . . 4-29
CVR Reserved—Bit 6 . . . . . . . . . . . . . . . . . . . . . . 4-30
CVR Host Command (HC)—Bit 7 . . . . . . . . . . . . . 4-30
Interrupt Status Register (ISR). . . . . . . . . . . . . . . . . . 4-30
ISR Receive Data Register Full (RXDF)—Bit 0. . . 4-30