Block Guide — S12BDM V4

11

Section 3 Memory Map/Register Definition

A summary of the registers associated with the BDM is shown in Table 3-1. Registers are accessed by

host-driven communications to the BDM hardware using READ_BD and WRITE_BD commands.

Detailed descriptions of the registers and associated bits are given in the subsections that follow.

Table 3-1 BDM Register Map Summary

Address

Register

Name

Bit 7

6

5

4

3

2

1

Bit 0

$FF00

Reserved

Read:

X

X

X

X

X

X

0

0

Write:

$FF01

BDMSTS

Read:

ENBDM BDMACT ENTAG

SDV

TRACE

CLKSW

UNSEC

0

Write:

$FF02

Reserved

Read:

X

X

X

XXXXX

Write:

$FF03

Reserved

Read:

X

X

X

XXXXX

Write:

$FF04

Reserved

Read:

X

X

X

XXXXX

Write:

$FF05

Reserved

Read:

X

X

X

XXXXX

Write:

$FF06

BDMCCR

Read:

CCR7

CCR6

CCR5

CCR4

CCR3

CCR2

CCR1

CCR0

Write:

$FF07

BDMINR

Read:

0

REG14

REG13

REG12

REG11

0

0

0

Write:

= Unimplemented

X = Indeterminate