P
RELIMINARY
P
RODUCT
S
PECIFICATION
1
Z86C83/C84/E83
CMOS Z8
®
MCU
FEATURES
Device
Z86C83
Z86E83
Z86C84
ROM
(KB)
4
4 (OTP)
4
RAM*
(Bytes)
237
237
237
I/O
Lines
21
21
17
Voltage
Range
3.0V to 5.5V
3.5V to 5.5V
3.0V to 5.5V
s
1
Six Vectored, Prioritized Interrupts from Six Different
Sources
Two Analog Comparator Inputs with Programmable
Interrupt Polarity
Two Programmable 8-Bit Timers, each with a 6-Bit
Programmable Prescaler
Power-On Reset (POR) Timer
Permanent Watch-Dog Timer (WDT) Option
Software-Programmable Pull-Up Resistors (Port 2 Only)
On-Chip Oscillator for Crystal, Resonator or LC
ROM Protect
s
s
Note:
* General-Purpose
s
s
s
s
28-Pin DIP, SOIC, and PLCC Packages
Clock Speed: 16 MHz
Three Expanded Register Groups
8-Channel, 8-Bit A/D Converter with Track and Hold,
and Unique R-Ladder A
GND
Offset Control
Z86C84 has two 8-Bit D/A Converters
Programmable Gain Stages, 3 µs Settling Time
with
s
s
s
s
s
s
GENERAL DESCRIPTION
The Z86C83/C84/E83 are full-featured members of the
Z8
®
MCU family offering a unique register-to-register ar-
chitecture that avoids accumulator bottlenecks for higher
code efficiency than RISC processors.
The Z86C83/C84/E83 are designed to be used in a wide
variety of embedded control applications, such as appli-
ances, process controls, keyboards, security systems, bat-
tery chargers, and automotive modules.
For applications requiring powerful I/O capabilities, the
Z86C83/C84/E83 devices can have up to 21/17 (83/84 re-
spectively) pins dedicated to input and output. These lines
are grouped into three ports, and are configured by soft-
ware to provide digital/analog I/O timing and status signals.
An on-chip, half-flash 8-bit ±1/2 Least Significant Bit (LSB)
A/D converter can multiplex up to eight analog inputs. Un-
used analog inputs revert to standard digital I/O use.
DS97DZ80700
Unique, programmable A
GND
offset control of the A/D re-
sistor ladder compresses the converter's dynamic range
for maximum effective 9-bit A/D resolution.
The Z86C84 has two 8-bit ±1/2 LSB D/A converters. High
and low reference voltages provide precise control of the
output voltage range. Programmable gain for each D/A
converter provides a maximum effective 10-bit resolution
for many tasks.
On-chip 8-bit counter/timers with many user-selectable
modes simplify real-time tasks, such as counting, timing,
and generation of PWM signals.
The designer can prioritize six different maskable, vec-
tored, internal or external interrupts for efficient interrupt
handling and multitasking functions.
PRELIMINARY
8-1
Z86C83/C84/E83
CMOS Z8
®
MCU
Zilog
GENERAL DESCRIPTION
(Continued)
By means of an expanded register file, the designer has
access to additional control registers for configuring pe-
ripheral functions including the A/D and D/A converters,
counter/timers, and I/O port functions (Figure 1).
Notes:
All signals with a preceding front slash, "/", are
active Low. For example, B//W (WORD is active Low);
/B/W (BYTE is active Low, only).
Power connections follow conventional descriptions be-
low:
Connection
Power
Ground
Circuit
V
CC
GND
Device
V
CC
V
SS
P00
P01
P02
P03†
Port 0
P04†
P05†
P06†
VDHI **
VDL0 **
DAC1 **
DAC2 **
AC0/P20
AC1/ 21
P
AC2/P22
AC3/P23
AC4/P24
AC5/P25
AC6/P26
AC7/P27
Comparators
(2)
Register File
P31
P32
P33
Port 3
P34
P35
P36
Z8 Core
Internal Data Bus
Machine
Timing
and
Instruction
Control
XTAL 1/2
/RESET
Register Bus
Internal
Address Bus
Program
Memory
4K x 8
**Dual
8-Bit
DAC
Port 2
Expanded
Register File
Expanded
Register Bus
Power
VCC
GND
AVCC
AGND
8-Channel
8-Bit A/D
Counter/Timer
8-Bit (2)
Notes:
** Not available on Z86C83/E83
† Not available on Z86C84
Figure 1. Z86C83/C84/E83 Functional Block Diagram
8-2
PRELIMINARY
DS97DZ80700
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