Chapter 6 Support Information; Introduction; Connector Signal Descriptions - Motorola M68HC11EVBU User Manual

6.1

INTRODUCTION

This chapter provides the connector signal descriptions, parts list with associated parts location
diagram, and schematic diagrams for the EVBU.
6.2

CONNECTOR SIGNAL DESCRIPTIONS

The EVBU provides two MCU Input/Output (I/O) connectors P4 and P5. Connector P4 is used to
interconnect the MCU I/O to a target system environment, or a convenient access to the MCU
I/O for user applications. Connector P5 is used to interconnect the MCU I/O to the EVBU wire-
wrap area.
Connector P1 interconnects an external power supply to the EVBU. Connector P2 is provided to
facilitate interconnection of a terminal and/or host computer. Connector P3 connects an external
battery for battery backup purposes.
Pin assignments for the above connectors (P1 through P5) are identified in Tables 6-1 through 6-
4. Connector signals are identified by pin number, signal mnemonic, and signal name and
description.
Table 6-1. Input Power Connector (P1) Pin Assignments
Pin Number Signal Mnemonic
1
2
M68HC11EVBU/D
CHAPTER 6
SUPPORT INFORMATION
+5 V +5 Vdc Power – Input voltage (+5 Vdc @ 50 mA) used by the
EVBU logic circuits.
GND Ground
SUPPORT INFORMATION
Signal Name And Description
6-1