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Programming Reference
Application:
HI
Host Receive Data Register (HORX)
X:$FFEB Read Only
Reset = $000000
23
22
21
20
19
Receive High Byte
Host Transmit Data Register (HOTX)
X:$FFEB Write Only
Reset = $000000
23
22
21
20
19
Receive High Byte
B-20
DSP Side
Host Receive Data Full (HRDF)
0 = wait/1 = read
Host Transmit Data Empty (HTDE)
0 = wait/1 = write
Host Command Pending (HCP)
0 = wait/1 = ready
Host Flags (HFO, HF1)
read only
DMA Status (DMA)
read only
0 = disabled/1 = enabled
Host Status Register (HSR)
X:$FFE9 Read Only
Reset = $000002
18
17
16
15
14
13
Receive Middle Byte
Host Receive Data Register (HORX)
18
17
16
15
14
13
Receive Middle Byte
Host Transmit Data Register (HOTX)
DSP56012 User's Manual
• • •
23
7
DMA
*
0
* = Reserved, write as 0
Host Status Register (HSR)
Host Receive Data (Usually Read by Program)
12
11
10
9
8
7
Host Transmit Data (Usually Loaded by Program)
12
11
10
9
8
7
Date:
Programmer:
Sheet 2 of 5
6
5
4
3
2
1
HF1
HF0
HCP
HTDE
*
*
0
0
6
5
4
3
2
1
Receive Low Byte
6
5
4
3
2
1
Receive Low Byte
MOTOROLA
0
HRDF
0
0
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