Z8615
CPS DC-4143-05
C
USTOMER
P
ROCUREMENT
S
PECIFICATION
Z8615
NMOSZ8
®
8-BITMCU
K
EYBOARD
C
ONTROLLER
DESCRIPTION
The Z8615 Keyboard Controller (KBC) is a member of the
Z8
®
single-chip microcontroller family with 4 Kbytes of
ROM. The device is housed in a 40-pin DIP and 44-pin
PLCC package, and is manufactured in NMOS technol-
ogy. The Z8615 KBC microcontroller offers fast execution,
efficient use of memory, sophisticated interrupt, input/
output bit-manipulation capabilities, and easy hardware/
software system expansion along with low cost and low
power consumption.
The Z8615 KBC architecture is characterized by a flexible
I/O scheme, an efficient register, I/O, and a number of
ancillary features that are useful in many industrial and
advanced scientific applications.
For applications which demand powerful I/O capabilities,
the KBC provides 32 pins dedicated to input and output.
These lines are grouped into four ports, each port consists
of 8 lines, and are configurable under software control to
provide timing, status signals, and serial or parallel I/O
ports.
The Z8615 KBC offers low EMI emission which is achieved
by means of several modifications in the output drivers and
clock circuitry of the device.
There are two basic address spaces which are available to
support this wide range of configurations: Program Memory
and 124 General-Purpose Registers.
The Z8615 KBC offers two on-chip counter/timers with a
large number of user-selectable modes. This unburdens
the program from coping with real-time problems such as
counting/timing (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
Power
Ground
Circuit
V
CC
GND
Device
V
DD
V
SS
DC-4143-05
(5-13-94)
1
Z8615
CPS DC-4143-05
ABSOLUTE MAXIMUM RATINGS
Symbol
V
CC
T
STG
T
A
Description
Supply Voltage*
Storage Temp
Oper Ambient Temp
Min
–0.3
–65
†
Max
+7.0
+150
†
Units
V
C
Stresses greater than those listed under Absolute Maxi-
mum Ratings may cause permanent damage to the de-
vice. This is a stress rating only; operation of the device at
any condition above those indicated in the operational
sections of these specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods
may affect device reliability.
Notes:
* Voltage on all pins with respect to GND.
† See ordering information
STANDARD TEST CONDITIONS
The characteristics listed here apply for standard test
conditions as noted. All voltages are referenced to GND.
Positive current flows into the referenced pin (Test Load).
From Output
Under T
est
150 pF
Test Load Diagram
STANDARD TEST CONDITIONS
T
A
= 25°C, V
CC
= GND = 0V, f = 1.0 MHz, unmeasured pins returned to ground.
Parameter
Input capacitance
Output capacitance
I/O capacitance
Max
12 pF
12 pF
12 pF
5
Embedded System
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