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Application:
HOST
HOST – HOST PROCESSOR SIDE
Interrupt Control Register (ICR)
$0 Read/Write
Reset = $00
Command Vector Register (CVR)
$1 Read/Write
Reset = $16
MOTOROLA
DSP56156 Host Programming Sheet
Receive Request Enable
DMA Off
DMA On
Transmit Request Enable
DMA Off
DMA On
Host Flags
Write Only
Host Mode Control
00 = DMA Off
10 = 16 Bit DMA 11 = 8 Bit DMA
Initialize (Write Only)
0 = ∏ No Action 1 = ∏ Initialize DMA
Figure C-26 Interrupt Control Register (ICR)
Host Vector
Executive Interrupt Routine 0-31
Host Command
0 = ∏ Idle
Figure C-27 Command Vector Register (CVR)
PROGRAMMING SHEETS
0 = ∏ Interrupts Disabled
1 = Interrupts Enabled
0 = Host → DSP
1 = DSP → Host
0 = ∏ Interrupts Disabled
1 = Interrupts Enabled
0 = DSP → Host
1 = Host → DSP
01 = Illegal
INIT
1 = ∏ Interrupt DSP
HC
Date:
Programmer:
Sheet 3 of 5
7
6
5
4
3
2
*
HM1 HM0
HF1
HF0
TREQ RREQ
0
= Reserved, Program as zero
*
7
6
5
4
3
2
* *
HV4
HV3
HV2
0
0
= Reserved, Program as zero
*
C - 31
1
0
1
0
HV1
HV0
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