Host Data Direction And Host Data Registers (Hddr, Hdr - Motorola DSP56303 User Manual

Programming Sheets
Application:
GPIO
DRx = 1 HIx is Output
DRx = 0 HIx is Input
15 14
DR15 DR14 DR13
Host Data Direction Register (HDDR)
Reset = $00
DRx holds value of corresponding HI08 GPIO pin.
Function depends on HDDR.
15 14
D15 D14
Host Data Register (HDR)
Reset = Undefined
Figure B-23. Host Data Direction and Host Data Registers (HDDR, HDR)
B-34
Port B (HI08)
13 12 11 10 9
DR12 DR11 DR10 DR9
13 12 11 10 9
D13 D12 D11 D10 D9
X:$FFFFC9 Write
DSP56303 User's Manual
8 7 6 5 4
DR8 DR7 DR6 DR5 DR4
X:$FFFFC8 Write
8 7 6 5 4
D8 D7 D6 D5 D4
Date:
Programmer:
Sheet 1 of 4
3 2 1 0
DR3 DR2 DR1 DR0
3 2 1 0
D3 D2 D1 D0