Port b, Dsp side – Motorola DSP56012 User Manual
Page 251
Programming Reference
MOTOROLA
DSP56012 User’s Manual
B-19
HI
Sheet 1 of 5
Application:
Date:
Programmer:
Port B
15
PBC1 PBC0
6
5
4
3
2
1
0
10
9
8
7
14
13
12
11
23
* = Reserved, write as 0
• • •
PBC1 PBC0
Function
0
0
General Purpose I/O (Reset Condition)
0
1
Host Interface
1
0
Host Interface (with HACK Pin as GPIO)
1
1
Reserved
Port B
Control Register
X:$FFEC Read/Write
Reset = $000000
Port B Control Register (PBC)
*
0
*
0
*
0
*
0
*
0
*
0
*
0
*
0
*
0
*
0
*
0
*
0
*
0
*
0
*
0
$0
$0
$0
(PBC)
Host Control Register (HCR)
HTIE
HCIE
HRIE
HF3
HF2
6
5
4
3
2
1
0
7
23
* = Reserved, write as 0
• • •
*
0
*
0
*
0
*
0
Host Control Register (HCR)
X:$FFE8 Read/Write
Reset = $00
Host Receive Interrupt Enable (HRIE)
0 = disable/1 = enable — interrupt on HRDF
Host Transmit Interrupt Enable (HTIE)
0 = disable/1 = enable — interrupt on HTDE
Host Command Interrupt Enable (HCIE)
0 = disable/1 = enable — interrupt on HCP
Host Flags (HF3, HF2)
general purpose read/write flags
DSP Side