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FEATURES
s Low Power Consumption - 750 mW
s 32 Input/Output Lines
s Digital Inputs NMOS Levels with
Internal Pull-Up Resistors
s 4 Kbytes ROM
s Four Direct Connect LED Drive Pins
s 124 Bytes of RAM
CUSTOMER P ROCUREMENT
SPECIFICA TION
Z08617 NMOS Z8® 8-BIT MCU
KEYBOARD CONTROLLER
Z08617
NMOS Z8® 8-BIT MCU
KEYBOARD CONTROLLER
s Hardware Watch-Dog Timer (WDT)
s Two Programmable 8-Bit Counter/Timers,
Each with 6-Bit Programmable Prescaler
s Six Vectored, Priority Interrupts from
Six Different Sources
s On-Chip RC Oscillator
s Clock Frequency: Up to 5MHz
s 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
Ground
VCC
GND
VDD
VSS
DS96KEY0300
1

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GENERAL DESCRIPTION (Continued)
Z08617 NMOS Z8® 8-BIT MCU
KEYBOARD CONTROLLER
Output Input
Vcc GND
Port 3
Counter/
Timers (2)
Interrupt
Control
ALU
Flags
Register
Pointer
Register File
124 x 8-Bit
Machine Timing
& Instruction Control
WDT
POR
Program
Memory
Program
Counter
Port 2
Port 0
Port 1
I/O
(Bit Programmable)
44
I/O
Output Open-Drain
(Nibble Programmable)
8
I/O
Output Open-Drain
(Byte Programmable)
Figure 1. Z08617 Functional Block Diagram
2

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PIN IDENTIFICATION
Z08617 NMOS Z8® 8-BIT MCU
KEYBOARD CONTROLLER
VCC
CLK Out
RC In
P37
P30
/RESET
*GND
*N/C
/WDTOUT
P35
GND
P32
P00
P01
P02
P03
P04
P05
P06
P07
1 40
2 39
3 38
4 37
5 36
6 35
7 34
8 33
9 32
10 Z08617 31
11 DIP 30
12 29
13 28
14 27
15 26
16 25
17 24
18 23
19 22
20 21
P36
P31
P27
P26
P25
P24
P23
P22
P21
P20
P33
P34
P17
P16
P15
P14
P13
P12
P11
P10
Note:
* Pin 8 is connected to the chip, although used only for testing.
This pin must float. Pin 7 is a test pin and must be grounded.
Figure 2. 40-Pin DIP Pin Configuration
Table 1. 40-Pin DIP Pin Identification
Pin #
1
2
3
4
5
6
*7
*8
9
10
Symbol Function
V
CC
CLK Out
RC In
P37
P30
Power Supply
Clock Out
Z8 Clock
Port 3, Pin 7
Port 3, Pin 0
/RESET Reset
GND
Ground
N/C Not Connected
/WDTOUT Watch-Dog Timer
P35 Port 3, Pin 5
Direction
Input
Output
Input
Output
Input
Input
Output
Output
Pin # Symbol Function
Direction
11
12
13-20
21-28
29
GND
P32
P07-P00
P17-P10
P34
Ground
Port 3, Pin 2
Input
Port 0, Pins 0,1,2,3,4,5,6,7 In/Output
Port 1, Pins 0,1,2,3,4,5,6,7 In/Output
Port 3, Pin 4
Output
30 P33
Port 3, Pin 3
Input
31-38 P27-P20 Port 2, Pins 0,1,2,3,4,5,6,7 In/Output
34-38 P24-P20 Port 2, Pins 0, 1, 2, 3, 4 In/Output
39 P31
Port 3, Pin 1
Input
40 P36
Port 3, Pin 6
Output
3