1

Z86C15

CP96KEY0603

FEATURES

ROM

RAM*

I/O

Speed

Pin Count /

(Kbytes)

(Bytes)

Lines

(MHz)

Package

4

236

3 2

5

40 DIP

44 PLCC

44 QFP

* General-Purpose

n

4.5- to 5.5-Volt Operating Range

n

0

°C to 70°C Operating Temperature Range

n

Expanded Register File

n

Low-Power Consumption: 30 mW @ 5 MHz Typical

n

Six Vectored, Priority Interrupts from

Six Different Sources

n

Two Programmable 8-Bit Counter/Timers,

Each with 6-Bit Programmable Prescaler

n

Power-On Reset (POR) Timer, Hardware Watch-Dog

Timer (WDT)

n

Digital Inputs CMOS Levels with

Internal Pull-Up Resistors

n

Four Direct Connect LED Drive Ports

n

On-Chip RC Oscillator, 4 MHz to 5 MHz

GENERAL DESCRIPTION

The Z86C15 Keyboard Controller is a full-featured mem-

register-to-register architecture that avoids accumulator

bottlenecks and is more code efficient than RISC

processors.

For applications demanding powerful I/O capabilities, the

Z86C15 provides 32 pins dedicated to input and output.

These lines are grouped into four ports, each port consist-

ing of eight lines, and are configurable under software

control to provide timing, status signals, and serial or

parallel I/O ports.

Two on-chip counter/timers, with a large number of user-

selectable modes, are available to relieve the system of

administering real-time tasks, such as counting/timing and

I/O datacommunications.

Six different internal or external interrupt sources are

maskable and prioritized so a vectored address is pro-

vided for efficient interrupt subroutine handling and

multitasking functions.

CP96KEY0603 (3/96)

The Z86C15 achieves low-EMI by means of several modi-

fications in the output drivers and clock circuitry of the

device.

By means of an expanded register file, the designer has

access to three additional system control registers that

provide extra peripheral devices, I/O ports, and register

addresses (see Functional Block Diagram).

Notes:

All Signals with a preceding front slash, "/", are active Low, e.g.,

B//W (WORD is active Low); /B/W (BYTE is active Low, only).

Power connections follow conventional descriptions below:

Connection

Circuit

Device

Power

V

CC

V

DD

Ground

GND

V

SS

Z86C15