ZILOG Z0861705PSC Datasheet

1

Z08617 NMOS Z8

®

8-BIT MCU

KEYBOARD CONTROLLER

FEATURES

C

USTOMER PROCUREMENT

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 bit­manipulation capabilities, and easy hardware/soft­ware system expansion along with low cost and low
power consumption.

The Z08617 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 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 avail­able 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 unbur­dens the program from coping with real-time prob­lems 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-BIT MCU
KEYBOARD CONTROLLER

Z08617 NMOS Z8

®

8-BIT MCU

KEYBOARD CONTROLLER

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)

44 8

WDT

POR

/WDTOUT

/RESET

XTAL2

XTAL1

Figure 1. Z08617 Functional Block Diagram

3

Z08617 NMOS Z8

®

8-BIT MCU

KEYBOARD CONTROLLER

PIN IDENTIFICATION

Figure 2. 40-Pin DIP Pin Configuration

Pin # Symbol Function Direction

1V

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-BIT MCU

KEYBOARD CONTROLLER

4

ABSOLUTE MAXIMUM RATINGS

Symbol Description Min Max Units

V

CC

Supply Voltage* –0.3 +7.0 V

T

STG

Storage Temp –65 +150 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 condi­tions for extended periods may affect device reliabil­ity.

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, VCC = 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-BIT MCU

KEYBOARD CONTROLLER

DC CHARACTERISTICS

VCC = 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 IOH = –250 µA (Port 2 only)
Output High Voltage 2.4 V IOH = –250 µA (Port 3 only)

V

OL

Output Low Voltage 0.8 V IOL = 10.0 mA (See note [1] below.)

I

IL

Input Leakage –10 10 µAVIN = 0V, 5.25V (See note [3] below.)

I

OL

Output Leakage –10 10 µAVIN = 0V, 5.25V (See note [2] below.)

I

IR

Reset Input Current –335 –775 –477 µAV

IN

= 0V, 5.25V

I

R1

Input Current –335 –775 µA Pull-up resistor=10.4 Kohms, VIN=0.0V

I

R2

Input Current –1.6 –2.9 mA Pull-up resistor = 2.4 Kohms, VIN=0.0V

I

CC

VCC Supply Current 160 mA

WDT Watch-Dog Timer 2.0 mA VOL=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.

Z08617 NMOS Z8

®

8-BIT MCU

KEYBOARD CONTROLLER

6

PIN FUNCTIONS

RCIN This pin is connected between a precision resistor

on the power supply from the precision RC Oscillator.

CLK Out This pin is the syste m clock of the Z8 and
runs at the frequency of the RC Oscillator. Any load on
this pin will effect the RC Oscillator frequency.

Port 0 (P07-P00). Port 0 is an 8-bit, nibble program­mable, bi-directional, NMOS compatible I/O port. These
eight I/O lines can be configured under software
control as a nibble input port, or as a nibble open-drain
output port. When used as an I/O port, inputs are
standard NMOS (Figure 5). Port P03-P00 has 10.4
Kohms (±35%) pull-up resistors when configured as
inputs.

Figure 5. Port 0 Configuration

Port 0

I/O

(Open-Drain Output)

Z8615

4

4

Input

Output

Pad

OEN

10.4 Kohms

(a) Port P00-P03

Input

Output

Pad

OEN

(b) Port P04-P07

7

Z08617 NMOS Z8

®

8-BIT MCU

KEYBOARD CONTROLLER

PIN FUNCTIONS (Continued)

Port 1 (P17-P10). Port 1 is an 8-bit, byte programmable,

bidirectional, NMOS compatible I/O port. These eight I/O
lines are configured under software control program as a

byte input port or as an open-drain output port. When used
as an I/O port, inputs are standard NMOS (Figure 6).

Port 1

I/O

(Open-Drain Output)

Z8615 8

Input

Output

Pad

OEN

Figure 6. Port 1 Configuration

Z08617 NMOS Z8

®

8-BIT MCU

KEYBOARD CONTROLLER

8

Port 2 (P27-P20). Port 2 is an 8-bit, bit programmable, bi­directional, NMOS compatible I/O port. These eight I/O
lines are configured under the software control program
for I/O. Port 2 can be programmed as bit-by-bit indepen­dently, as input or output, or configured to provide open-

drain outputs (Figure 7). P26 and P27 have 2.4 Kohms
(± 25%) pull-up resistors and are capable of sourcing

2.4 mA. P24 and P25 have 10.4 Kohms (± 35%) pull-up
when configured as inputs.

Open-Drain

OUT

OEN

IN

Pad

Input

(a) Ports P20-P23

Port 2
(I/O)

Z8615

Open-Drain

OUT

OEN

IN

Pad

10.4 Kohms

Input

(b) Ports P24-P25

Open-Drain

OUT

OEN

IN

Pad

2.4 Kohms

Input

(c) Ports P26-P27

Figure 7. Port 2 Configuration