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Application:
HOST
Host Status Register (HSR)
X:$FFE4 Read Only
Reset = $02
Host Receive Data Register (HRX)
X:$FFE5 Read Only
Reset = $xxxx
Host Transmit Data Register (HTX)
X:$FFE5 Write Only
Reset = $xxxx
Figure C-25 Host Transmit Data Register (HTX)
C - 30
DSP56156 Host Programming Sheet
HOST – DSP SIDE
Host Receive Data Full
0 = ∏ Wait
1 = ∏ Read
Host Transmit Data Empty
0 = ∏ Wait
1 = ∏ Write
Host Command Pending
0 = ∏ Wait
1 = ∏ Ready
Host Flags
Read Only
DMA Status (Read Only)
0 = ∏ Disabled
Figure C-23 Host Status Register (HSR)
15 14 13 12 11 10
H I G H B Y T E
Figure C-24 Host Receive Data Register
15 14 13 12 11 10
H I G H B Y T E
PROGRAMMING SHEETS
Date:
Programmer:
1 = ∏ Enabled
7
DMA
*
Host Receive Data (usually Read by program)
9
8
7
Host Transmit Data (usually loaded by program)
9
8
7
Sheet 2 of 5
6
5
4
3
2
1
* *
HF1
HF0 HCP HTDE HRDF
0
0
= Reserved, Program as zero
6
5
4
3
2
1
L O W B Y T E
6
5
4
3
2
1
L O W B Y T E
MOTOROLA
0
0
0
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