Motorola DSP56012 4-4 DSP56012 Users Manual MOTOROLA

4-4 DSP56012 User’s Manual MOTOROLA
Parallel Host Interface
Port B Configuration
Figure 4-2 Parallel Port B Registers
BC1 BC0 Function
00
Parallel I/O (Reset Condition)
01
HI
10
HI (with HACK pin as GPIO)
11
Reserved
BDx Data Direction
0Input (Reset Condition)
1Output
0000000000000000000000BC
1
BC
0
X:$FFEC
Port B Control
Register
00000000 BD
14
BD
13
BD
12
BD
11
BD
10
BD
9
BD
8
BD
7
BD
6
BD
5
BD
4
BD
3
BD
2
BD
1
BD
0
23 0
X:$FFED
Port B Data
Direction
Register
23 0
X:$FFEE Port B Data
Register
00000000 PB
14
PB
13
PB
12
PB
11
PB
10
PB
9
PB
8
PB
7
PB
6
PB
5
PB
4
PB
3
PB
2
PB
1
PB
0
23 0
AA0308.11
(PBC)
(PBDDR)
(PBD)
0
0