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Port b, Dsp side – Motorola DSP56012 User Manual

Page 251

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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