Z86217 Datasheet, PDF (1/7 Pages) Zilog, Inc. – CMOS Z8 8-BIT MICROCONTROLLERS (POINTING DEVICE/TRACKBALL)

PRELIMINARY
Z86217/C17
CP95KEY1000
PRELIMINARY
CUSTOMER PROCUREMENT SPECIFICATION
FEATURES
Part
ROM
Number (Kbytes)
Z86217
2
Z86C17
2
* General-Purpose
RAM*
(Bytes)
124
124
I/O
Lines
14
14
Speed
(MHz)
4
4
s 18-Pin DIP and SOIC Packages
s 3.0- to 5.5-Volt Operating Range
s 0°C to 70°C Operating Temperature Range
Z86217/C17
CMOS Z8^® 8-BIT MICROCONTROLLERS
(POINTING DEVICE/TRACKBALL)
s Permanent Watch-Dog Timer (WDT)
s Oscillator Filter
s Two Programmable 8-Bit Counter/Timers
s Low-EMI Operation
s Scalable Trip-Point Buffer
s On-Board Pull-Up Resistors
s High Drive Ports Can Sink 20 mA Per Pin, with Three
Pins Maximum
GENERAL DESCRIPTION
The Z86217/C17 are members of Zilog's Z8^® family of
microcontrollers designed to reduce external system com-
ponents and offer easy software/hardware development
tools for pointing device and trackball applications.
The devices feature on-board pull-up resistors, and a
scalable trip-point buffer to accommodate opto-transistor
outputs. The high drive ports are capable of up to 20 mA
(at V_OL = 0.8-volt) current sinking per pin, with three pins
maximum, providing extra sinking current capability.
The Z86217/C17's permanently enabled Watch-Dog Timer
(WDT) operates upon power-up of the MCU, and provides
added operational reliability for pointing device and
trackball environments.
An oscillator filter assists in separating out high-frequency
noise from the oscillator input pin.
Two on-chip counter/timers with a large number of
selectable modes, offload the system of administering
real-time tasks such as counting/timing and I/O data
communications.
Notes:
Refer to the DC electrical characteristics for detailed specification of the
sinking current.
On the Z86C17, P24-P27 has a 20K pull-up, and P32 has a 47K pull-
down. The Z86217 does not have these functions.
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
CP95KEY1000 8/95
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