ZiLOG Z08617, Manual

Page: 1 / 26

1
Z08617 NMOS Z8
®
8-B
IT
MCU
K
EYBOARD
C
ONTROLLER
FEATURES
C
USTOMER
P
ROCUREMENT
S
PECIFICA TION
■ Low Power Consumption - 750 mW
■ 32 Input/Output Lines
■ Digital Inputs NMOS Levels with
Internal Pull-Up Resistors
■ 4 Kbytes ROM
■ Four Direct Connect LED Drive Pins
■ 124 Bytes of RAM
■ Hardware Watch-Dog Timer (WDT)
■ Two Programmable 8-Bit Counter/Timers,
Each with 6-Bit Programmable Prescaler
■ Six Vectored, Priority Interrupts from
Six Different Sources
■ On-Chip RC Oscillator
■ Clock Frequency: Up to 5MHz
■ Low EMI Emission
GENERAL DESCRIPTION
The Z08617 Keyboard Controller is a member of the
Z8
®
single-chip microcontroller family with 4 Kbytes
of ROM. The device is housed in a 40-pin DIP package,
and is manufactured in NMOS technology. The Z08617
microcontroller offers fast execution, efficient use of
memory, sophisticated interrupt, input/output bit-
manipulation capabilities, and easy hardware/soft-
ware system expansion along with low cost and low
power consumption.
The Z08617 architecture is characterized by a flex-
ible 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 capabili-
ties, the Z08617 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 Z08617 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 avail-
able to support this wide range of configurations:
Program Memory and 124 General-Purpose Registers.
The Z08617 offers two on-chip counter/timers with
a large number of user-selectable modes. This unbur-
dens the program from coping with real-time prob-
lems such as counting/timing (Figure 1).
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
DS96KEY0300
Z08617
NMOS Z8 ® 8-B
IT
MCU
K
EYBOARD
C
ONTROLLER