1
Z08617 NMOS Z8
8-B
IT
MCU
K
EYBOARD
C
ONTROLLER
FEATURES
C
USTOMER
P
ROCUREMENT
S
PECIFICA
TION
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
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
V
CC
V
DD
Ground
GND
V
SS
DS96KEY0300
Z08617
NMOS Z8
8-B
IT
MCU
K
EYBOARD
C
ONTROLLER
Z08617 NMOS Z8
8-B
IT
MCU
K
EYBOARD
C
ONTROLLER
2
GENERAL DESCRIPTION
(Continued)
Port 3
Counter/
Timers (2)
Interrupt
Control
Port 2
I/O
(Bit Programmable)
ALU
Flags
Register
Pointer
Register File
124 x 8-Bit
Machine Timing
& Instruction Control
Program
Memory
Program
Counter
Vcc
GND
Output
Input
Port 0
Port 1
I/O
Output Open-Drain
(Nibble Programmable)
I/O
Output Open-Drain
(Byte Programmable)
4
4
8
WDT
POR
/WDT
OUT
/RESET
XT
AL2
XT
AL1
Figure 1. Z08617 Functional Block Diagram
3
Z08617 NMOS Z8
8-B
IT
MCU
K
EYBOARD
C
ONTROLLER
PIN IDENTIFICATION
Figure 2. 40-Pin DIP Pin Configuration
Pin #
Symbol
Function
Direction
1
V
CC
Power Supply
Input
2
CLK Out
Clock Out
Output
3
RC In
Z8 Clock
Input
4
P37
Port 3, Pin 7
Output
5
P30
Port 3, Pin 0
Input
6
/RESET
Reset
Input
*7
GND
Ground
*8
N/C
Not Connected
9
/WDTOUT Watch-Dog Timer
Output
10
P35
Port 3, Pin 5
Output
Pin #
Symbol
Function
Direction
11
GND
Ground
12
P32
Port 3, Pin 2
Input
13-20
P07-P00 Port 0, Pins 0,1,2,3,4,5,6,7 In/Output
21-28
P17-P10 Port 1, Pins 0,1,2,3,4,5,6,7 In/Output
29
P34
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
Table 1. 40-Pin DIP Pin Identification
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
VCC
CLK Out
RC In
P37
P30
/RESET
*GND
*N/C
/WDTOUT
P35
GND
P32
P00
P01
P02
P03
P04
P05
P06
P07
P36
P31
P27
P26
P25
P24
P23
P22
P21
P20
P33
P34
P17
P16
P15
P14
P13
P12
P11
P10
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
24
23
22
21
Z08617
DIP
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.
Z08617 NMOS Z8
8-B
IT
MCU
K
EYBOARD
C
ONTROLLER
4
ABSOLUTE MAXIMUM RATINGS
Symbol
Description
Min
Max
Units
V
CC
Supply Voltage*
0.3
+7.0
V
T
STG
Storage Temp
6 5
+ 1 5 0
C
T
A
Oper Ambient Temp
Notes:
* Voltage on all pins with respect to GND.
See ordering information
Stresses greater than those listed under Absolute
Maximum Ratings may cause permanent damage to
the device. 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 condi-
tions for extended periods may affect device reliabil-
ity.
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
(Figure 17).
From Output
Under Test
150 pF
Figure 17. Test Load Diagram
STANDARD TEST CONDITIONS
T
A
= 25
C, V
CC
= GND = 0V, f = 1.0 MHz, unmeasured pins returned to ground.
Parameter
Max
Input capacitance
12 pF
Output capacitance
12 pF
I/O capacitance
12 pF
5
Z08617 NMOS Z8
8-B
IT
MCU
K
EYBOARD
C
ONTROLLER
DC CHARACTERISTICS
V
CC
= 4.75V to 5.25V @ 0
C to -55
C
Sym
Parameter
Min
Max
Typ*
Unit
Condition
V
IH
Input High Voltage
2.0
V
CC
V
V
IL
Input Low Voltage
0.3
0.8
V
V
RH
Reset Input High Voltage
3.8
V
CC
V
V
RL
Reset Input Low Voltage
0.3
0.8
V
V
OH
Output High Voltage
2.0
V
I
OH
= 250
A (Port 2 only)
Output High Voltage
2.4
V
I
OH
= 250
A (Port 3 only)
V
OL
Output Low Voltage
0.8
V
I
OL
= 10.0 mA (See note [1] below.)
I
IL
Input Leakage
10
10
A
V
IN
= 0V, 5.25V (See note [3] below.)
I
OL
Output Leakage
10
10
A
V
IN
= 0V, 5.25V (See note [2] below.)
I
IR
Reset Input Current
335
775
477
A
V
IN
= 0V, 5.25V
I
R1
Input Current
335
775
A
Pull-up resistor=10.4 Kohms, V
IN
=0.0V
I
R2
Input Current
1.6
2.9
mA
Pull-up resistor = 2.4 Kohms, V
IN
=0.0V
I
CC
V
CC
Supply Current
160
mA
WDT
Watch-Dog Timer
2.0
mA
V
OL
=0.4 Volt
Notes:
* Typical @ 25
C
[ 1 ] Ports P37-P34 may be used to sink 12 mA. These may be used
for LEDs or as general-purpose outputs requiring high sink
current.
[ 2 ] P00-P07, P10-P17, P20-P25, P30-P33 as output mode open-
drain as a logic one.
[ 3 ] P00-P07, P10-P17, P20-P25, P30-P33 as output mode open-
drain as a logic one.
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