MC68HC11P2BCFN4 datasheet(21/268 Pages) FREESCALE

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MC68HC11P2 — Rev 1.0

Technical Data

Pin Descriptions

Technical Data — MC68HC11P2

Section 2. Pin Descriptions

2.1 Contents

2.2

Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

2.3

VDD and VSS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

2.4

RESET . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

2.5

Crystal driver and external clock input (XTAL, EXTAL) . . . 24

2.6

E clock output (E) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

2.7

Phase-locked loop (XFC, VDDSYN) . . . . . . . . . . . . . . . . . . . 26

2.8

Interrupt request (IRQ) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .32

2.9

Nonmaskable interrupt (XIRQ/VPPE) . . . . . . . . . . . . . . . . . . 32

2.10

MODA and MODB (MODA/LIR and MODB/VSTBY) . . . . . . . 33

2.11

VRH and VRL. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

2.12

PG7/R/W. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

2.13

Port signals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

2.2 Introduction

The MC68HC11P2 is available in an 84-pin plastic-leaded chip carrier

(PLCC); the MC68HC711P2 is also available in an 84-pin windowed

cerquad package, to allow full use of the EPROM. Most pins on this MCU

serve two or more functions, as described in the following paragraphs.

Refer to Figure 2-1 which shows the pin assignments for both 84-pin

packages.

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