Figure D-9 Interrupt Control And Interrupt Status Registers - Motorola DSP56309 User Manual

Application:
HOST
Receive Request Enable
DMA Off
DMA On
Transmit Request Enable
DMA Off
DMA On
HDRQ HREQ/HTRQ HACK/HRRQ
0 HREQ
1 HTRQ
Host Flags
Write Only
Host Little Endian
Initialize (Write Only)
0 = ¸ No Action
Receive Data Register Full
0 = Wait
Transmit Data Register Empty
0 = Wait
Transmitter Ready
0 = Data in HI
Host Flags
Read Only
DMA Status
0 = ¸ DMA Disabled
Host Request
0 = ¸ HREQ Deasserted 1 = ¸ HREQ Asserted

Figure D-9 Interrupt Control and Interrupt Status Registers

MOTOROLA
Processor Side
0 = ¸ Interrupts Disabled
1 = Interrupts Enabled
0 = Host ® DSP 1 = DSP ® Host
0 = Õ Interrupts Disabled
1 = Interrupts Enabled
0 = DSP ® Host 1 = Host ® DSP
HACK
HRRQ
1 = ¸ Initialize DMA
Interrupt Control Register (ICR)
1 = Read
1 = Write
1 = Data Not in HI
1 = ¸ DMA Enabled
Interrupt Status Register (ISR)
$2 Read/Write
DSP56309UM/D
7 6
*
INIT HLEND
0
X:$
Read/Write
Reset = $0
7 6
HREQ DMA *
0
Reset = $06
*
= Reserved, Program as 0
*
Programming Reference
Date:
Programmer:
Sheet 4 of 6
5 4 3 2 1
HF1 HF0 HDRQ TREQ
5 4 3 2 1
HF3 HF2 TRDY TXDE
0
RREQ
0
RXDF
D-23