user manual

Preparing the Hardware

3-9

Table 3-2. J1 Bit Descriptions

Bit J1 Pins Description

Bit #0 (GPI0) 1-2 When this bit is a one (high), it instructs the debugger to use

local Static RAM for its work page (i.e., variables, stack, vector

tables, etc.). This bit will be high when jumper is removed.

Bit #1 (GPI1) 3-4 When this bit is a one (high), it instructs the debugger to use

the default setup/operation parameters in ROM versus the

user setup/operation parameters in NVRAM. This is the same

as depressing the RESET and ABORT switches at the same

time. This feature can be used in the event the user setup is

corrupted or does not meet a sanity check. Refer to the ENV

command (Appendix A) for the ROM defaults. This bit will be

high when jumper is removed.

Bit #2 (GPI2) 5-6 Reserved for future use.

Bit #3 (GPI3) 7-8 Reserved for future use.

Bit #4 (GPI4) 9-10 Open to your application.

Bit #5 (GPI5) 11-12 Open to your application.

Bit #6 (GPI6) 13-14 Open to your application.

Bit #7 (GPI7) 15-16 Open to your application.

Table 3-3. Factory Settings for J1 General Purpose Readable Jumpers

Header

Number

Header

Description

ConÞguration Jumpers

General

purpose

software

readable

jumpers

GPI0 - GPI3:

Reserved

GPI4 - GPI7:

User-deÞnable

(Factory

conÞguration)

GPI0

GPI1

GPI2

GPI6

GPI3

GPI4

GPI5

GPI7