B-28, Figure b-28, Gpio – Motorola DSP56301 User Manual
Page 352
Programming Sheets
B
-40
DSP56301 User’s Manual
Figure B-28. Host Data Direction and Host Data Registers (HDDR, HDR)
Application:
Date:
Programmer:
Sheet 1 of 4
GPIO
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
DR5
DR4
DR3
DR2
DR1
DR0
DR6
DR15
DR14
DR13
DR12
DR8
DR11
DR9
DR10
X:$FFFFC8 Write
Reset = $00
Host Data Direction Register (HDDR)
DRx = 0
→
HIx is Input
DRx = 1
→
HIx is Output
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
D5
D4
D3
D2
D1
D0
D6
D15
D14
D13
D12
D8
D11
D9
D10
X:$FFFFC9 Write
Reset = Undefined
Host Data Register (HDR)
DRx holds value of corresponding HI08 GPIO pin.
DR7
D7
Function depends on HDDR.
Port B (HI08)