PRELIMINARY PRODUCT SPECIFICATION
Z86C34/ C35/ C36
Z86C44/ C45/ C46
®
CMOS Z8 MCUS WITH ASCI UART
OFFER EFFICIENT, COST-EFFECTIVE
DESIGN FLEXIBILITY
FEATURES
• Operating Temperature Ranges:
Standard: 0 °C to 70 °C
ROM
(kb)
RAM*
(Bytes)
Speed
(MHz)
Device
Extended: –40 °C to +105 °C
Z86C34
Z86C35
Z86C36
Z86C44
Z86C45
Z86C46
16
32
64
16
32
64
237
237
237
236
236
236
16
16
16
16
16
16
• Expanded Register File (ERF)
• UART (ASCI)
• 32 Input/Output Lines (C44/C45/C46)
24 Input/Output Lines (C34/C35/C36)
• Vectored, Prioritized Interrupts with Programmable Po-
Note: *General-Purpose
larity
• Two Analog Comparators
• 28-Pin DIP, 28-Pin SOIC and PLCC Packages (C34,
• Two Programmable 8-Bit Counter/Timers, Each with
C35, C36)
Two 6-Bit Programmable Prescaler
• 40-Pin DIP, 44-Pin PLCC and QFP Packages (C44,
• Watch-Dog Timer (WDT)/Power-On Reset (POR)
C45, C46)
• On-Chip Oscillator that Accepts a Crystal, Ceramic Res-
• 3.0- to 5.5-Volt Operating Range
• Clock Free Watch-Dog Timer (WDT) Reset
onator, LC, RC, or External Clock
• RAM and ROM Protect
• Optional 32 kHz Oscillator
GENERAL DESCRIPTION
ZiLOG’s Z8® MCU single-chip family now includes the
Z86C34/C35/C36/C44/C45/C46productline,featuringen-
hanced wake-up circuitry, programmable Watch-Dog Tim-
ers (WDT), and low-noise/EMI options. Each of the new
enhancementstotheZ8offeramoreefficient,cost-effective
designandprovidetheuserwithincreaseddesignflexibility
over the standard Z8 microcontroller core. The low-power
consumption CMOS microcontroller offers fast execution,
efficient use of memory, sophisticated interrupts, input/out-
put bit manipulation capabilities, and easy hardware/soft-
ware system expansion.
TheZ8subfamilyfeaturesanExpandedRegisterFile(ERF)
to allow access to register-mapped peripheral and I/O cir-
cuits. Four basic address spaces are available to support this
wide range of configurations: Program Memory, Register
File,DataMemory,andERF.TheRegisterFileiscomposed
of 236/237 bytes of general-purpose registers, four I/O port
registers, and 15 control and status registers. The ERF con-
sists of twelve control registers.
For applications demanding powerful I/O capabilities, the
Z86C34/C35/C36 offers 24 pins, and the Z86C44/C45/C46
offers 32 pins dedicated to input and output. These lines are
configurable under software control to provide timing, sta-
DS007600-Z8X0499
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