Stereo System User Manual

B-22 DSP56012 User’s Manual MOTOROLA
Programming Reference
Sheet 4 of 5
Application:
Date:
Programmer:
TXDETRDY RXDFHF3 HF2
65432107
* = Reserved, write as 0
*
0
HOREQ
Interrupt Status Register (ISR)
Interrupt Status Register (ISR)
$2 Read/Write
Reset = $06
Host Flags (HF3, HF2)
Read Only
Host Request (HOREQ)
0 = HOREQ deasserted/1 = HOREQ asserted
DMA
IV1IV5 IV0IV4 IV3
65432107
* = Reserved, write as 0
IV7
Interrupt Vector Register (IVR)
IV2
Receive Data Register Full (RXDF)
0 = wait/1 = read
Transmit Data Register Empty (TXDE)
0 = wait/1 = write
DMA Status (DMA)
0 = DMA disabled/1 = DMA enabled
Transmitter Ready (TRDY)
0 = data in HI/1 = data not in HOST8
Interrupt Vector Register (IVR)
$3 Read/Write
Reset = $0F
Interrupt Vector Number For Use By MC68000
Processor Family Vectored Interrupts.
IV6
Processor SideHI