Motorola DSP56012 - Manual (Page 254)

B-22 DSP56012 User’s Manual MOTOROLA
Programming Reference
Sheet 4 of 5
Application: Date:
Programmer:
TXDE TRDY RXDF HF3 HF2
6 5 4 3 2 1 0 7
* = 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
IV1 IV5 IV0 IV4 IV3
6 5 4 3 2 1 0 7
* = 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 Side HI