ZILOG Z86K1305FSC, Z86K1305PSC, Z86K1305VSC, Z86K1405FSC, Z86K1405PSC Datasheet

DS97KEY0204

P R E L I M I N A R Y

1

1

P

RELIMINARY

C

USTOMER

P

ROCUREMENT

S

PECIFICATION

Z86K13/K14/K15
K16/K17/K18

1

CMOS Z8

®

8-B

IT

MCU

K

EYBOARD

C

ONTROLLERS

FEATURES

■

4.5V to 5.5 V Operating Range

■

0 °

C to +70 ° C Operating Temperature Range

■

188 Bytes of Ram

■

Low-Power Consumption: 60 mW @ 5 MHz

■

Five Vectored, Priority Interrupts from FIve Different
Sources

■

A Programmable 8-Bit Counter/Timer, with 6-Bit
Programmable Prescaler

■

Power-On-Reset (POR) Timer, Hardware Watch-Dog
Timer (WDT)

■

Digital Inputs CMOS Levels with Internal Pull-Up
Resistors

■

Four Direct Connect LED Drive Ports

■

On-Chip RC Oscillator (Z86K13/14/15)

■

On-Chip Oscillator that Accepts a Crystal, Ceramic
Resonator, LC, or External Clock Drive (Z86K16/17/18)

■

Low System EMI Emission

GENERAL DESCRIPTION

The Z86KXX Keyboard Controllers are full-featured mem­bers of the Z8

®

MCU family offering a unique register-to­register architecture that avoids accumulator bottlenecks
and is more code efficient than RISC processors.

For keyboard applications demanding powerful I/O capa­bilities, the Z86KXX provides 32 pins dedicated to input
and output for row, column, clock, data, and LEDs.

The on-chip counter/timer is available to relieve the system
of administering real-time tasks.

Five different internal or external interrupt sources are
maskable and prioritized in which a vectored address is
provided for efficient interrupt subroutine handling and
multitasking functions.

The Z86K15 achieves low EMI by means of several modi­fications in the output drivers and clock circuitry of the de­vice.

ROM I/O Speed Pin Count/

Device (KB) Lines (MHz) Package

Z86K13 2 32 4-5 40-DIP, 44-PLCC,

44-QFP, COB

Z86K14 3 32 4-5 40-DIP, 44-PLCC,

44-QFP, COB

Z86K15 4 32 4-5 40-DIP, 44-PLCC,

44-QFP, COB

Z86K16 2 32 4-5 40-DIP, 44-PLCC,

44-QFP, COB

Z86K17 3 32 4-5 40-DIP, 44-PLCC,

44-QFP, COB

Z86K18 4 32 4-5 40-DIP, 44-PLCC,

44-QFP, COB

Z86K13/K14/K15/K16/K17/K18
CMOS Z8® 8-Bit MCU Keyboard Controllers Zilog

2

P R E L I M I N A R Y

DS97KEY0204

GENERAL DESCRIPTION (Continued)

Notes: All signals with a preceding front slash, “/”, are

active Low. For example, 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

Figure 1. Z86KXX Functional Block Diagram

Port 3

Interrupt

Control

Port 2

I/O

(Bit Programmable)

ALU

Flags

Register

Pointer

Machine

Timing & Inst.

Control

Program

Counter

GND

XTAL1

XTAL2

Output

Input

Port 0 Port 1

Open-Drain

Output

Open-Drain

Output

WDT
POR

Input

4

4

4

8 8

Counter/

Timers

USB SIE
and Trans

Register File
208 x 8-Bytes

Program
Memory
4 KB ROM

VCC

D+
D-

3.3 V
VR

VCC

Z86K13/K14/K15/K16/K17/K18

Zilog CMOS Z8® 8-Bit MCU Keyboard Controllers

DS97KEY0204

P R E L I M I N A R Y

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1

PIN DESCRIPTION

Figure 2. 40-Pin DIP Configuration

P30
P31
P32
P33
*NC
*NC
P27
P26
P25
P24

GND

VCC

P00
P01
P02
P03
P04
P05
P06
P07

P23
P22
P21
P20
P37
P36
P35
P34
RCIN/XTAL1
AGND/XTAL2
GND
VCC
P17
P16
P15
P14
P13
P12
P11
P10

40

Z86KXX

DIP

1

20 21

Notes:

*Pin 5 and 6 used for testing Ground during normal operation.
When Pin 5 is connected to V

CC

. Pin 6 is CLK OUT.
When Pin 5 is connected to GND, Pin 6 outputs nothing.
These pins must be tied to ground in application.

Table 1. 40-Pin DIP Pin Identification

Pin # Symbol Function Direction

1-4 P30-P33 Port 3, Pins 0,1,2,3 Input
5-6 NC Tied to GND
7-10 P27-P24 Port 2, Pins 7,6,5,4 In/Output
11 GND Ground
12 V

CC

Power Supply Input

13-20 P00-P07 Port 0, Pins 0,1,2,3,4,5,6,7 Output
21-28 P10-P17 Port 1, Pins 0,1,2,3,4,5,6,7 Output
29 V

CC

Power Supply

30 GND Ground
31 AGND/XTAL2 Analog Ground or Crystal Clock Out
32 RCIN/XTAL1 RCIN/Crystal Oscillator Clock Input
33-36 P34-P37 Port 3, Pins 4,5,6,7 Output
37-40 P20-P23 Port 2, Pins 0,1,2,3 Input

Z86K13/K14/K15/K16/K17/K18
CMOS Z8® 8-Bit MCU Keyboard Controllers Zilog

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P R E L I M I N A R Y

DS97KEY0204

PIN DESCRIPTION (Continued)

Figure 3. 44-Pin PLCC Pin Assignments

Z86KXX

PLCC

7

17

NC
P27
P26
P25
P24

GND

VCC

P00
P01
P02
P03

NC
P36
P35
P34
RCIN/XTAL1
NC
AGND/XTAL2
GND
VCC
P17
NC

P04

P05

P06

P07

P10

P11

P12

P13

P14

P15

P16

NCNCP33

P32

P31

P30

P23

P22

P21

P20

P37

1

2818

40

39

29

6

Notes:

Pins 5 and 6 used for testing. Ground during normal operation
When Pin 43 is connected to V

CC

, Pin 44 is CLKOUT.

When Pin 43 is connected to GND. Pin 44 outputs nothing.

Table 2. 44-Pin PLCC Pin Assignments

Pin # Symbol Function Direction

1-4 P30-P33 Port 3, Pins

0,1,2,3

Input

5-7 NC Test Pins (GND)
8-11 P27-P24 Port 2, Pins

4,5,6,7

In/Output

12 GND Ground
13 V

CC

Power Supply

14-21 P00-P07 Port 0, Pins

0,1,2,3,4,5,6,7

Output

22-28 P10-P16 Port 1, Pins

0,1,2,3,4,5,6

Output

29 NC Not Connected

30 P17 Port 1, Pin 7 Output
31 V

CC

Power Supply

32 GND Ground
33 AGND/ XTAL2 Analog Ground

or Crystal Clock

Out
34 NC Not Connected
35 RCIN/ XTAL1 RCIN/Crystal

Oscillator Clock

Input

36-38 P34-P37 Port 3, Pins

4,5,6,7

Output

39 NC Not Connected
40 P37 Port 3, Pin 7 Output
41-44 P20-P23 Port 2, Pins

0,1,2,3

In/Output

Table 2. 44-Pin PLCC Pin Assignments

Pin # Symbol Function Direction

Z86K13/K14/K15/K16/K17/K18

Zilog CMOS Z8® 8-Bit MCU Keyboard Controllers

DS97KEY0204

P R E L I M I N A R Y

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1

Figure 4. 44-Pin QFP Pin Assignments

34

44

P37
P20
P21
P22
P23
P30
P31
P32
P33

NC
NC

P16
P15
P14
P13
P12
P11
P10
P07
P06
P05
P04

NC

P27

P26

P25

P24

GND

VCC

P00

P01

P02

P03

NC

P36

P35

P34

RCIN/XTAL1NCAGND/XTAL2

GND

VCC

P17

NC

1

2333

Z86KXX

QFP

11

22

12

Notes:

Pins 43 and 44 are used for testing ground during normal operation.
When Pin 45 is connected to V

CC

, Pin 46 is CLKOUT.

When Pin 45 is connected to GND. Pin 46 outputs nothing.

Table 3. 44-Pin QFP Pin Identification

Pin # Symbol Function Direction

1 NC Not Connected
2-5 P24-P27 Port 2, Pins

4,5,6,7

In/Output

6 GND Ground
7V

CC

Supply V oltage

8-15 P00-P07 Port 0, Pins

0,1,2,3,4,5,6,7,

Output

16-22 P10-P16 Port 1, Pins

0,1,2,3,4,5,6

Output

23 NC Not Connected
24 P17 Port 1, Pin 7 Output
25 V

CC

Supply V oltage

26 GND Ground
27 AGND/ XTAL2 Analog Ground/

Crystal Clock Out
28 NC Not Connected
29 RCIN / XTAL1 RCIN/Crystal

Oscillator Clock

Input

30-32 P34-P36 Port 3, Pins 4,5,6 Output
33 NC Not Connected
34 P37 Port 3, Pin 7 Output
35-38 P20-P23 Port 2, Pins

0,1,2,3

Input

39-42 P30-P33 Port 3, Pins

0,1,2,3

Input

43-44 NC Test Pins (GND)

Table 3. 44-Pin QFP Pin Identification

Pin # Symbol Function Direction

Z86K13/K14/K15/K16/K17/K18
CMOS Z8® 8-Bit MCU Keyboard Controllers Zilog

6

P R E L I M I N A R Y

DS97KEY0204

ABSOLUTE MAXIMUM RATINGS

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 5).

CAPACITANCE

T

A

= 25 ° C; V

CC

= GND = 0V; f = 1.0 MHz; unmeasured pins returned to GND.

Frequency tolerance ± 10%

Symbol Description Min Max Units

V

CC

Supply V oltage* –0.3 +7.0 V

T

STG

Storage Temp –65 +150 ° C

T

A

Oper Ambient Temp 0 +105 ° C

Note: * Voltage on all pins with respect to GND.

Figure 5. Test Load Diagram

From Output

Under Test

150 pF

Parameter Max

Input Capacitance 12 pF
Output Capacitance 12 pF
I/O Capacitance 12 pF

Z86K13/K14/K15/K16/K17/K18

Zilog CMOS Z8® 8-Bit MCU Keyboard Controllers

DS97KEY0204

P R E L I M I N A R Y

7

1

DC CHARACTERISTICS

V

CC

= 5.0V ± 10% @ 0 ° C to +70 ° C

Sym Parameter Min Max Typ* Unit Condition

V

CH

Clock Input High Voltage 0.7 V

CC

V

CC

+ 0.3V 2.5 V Driven by External Clock Generator

V

CL

Clock Input Low Voltage GND –0.3 0.2 V

CC

1.5 V Driven by External Clock Generator

V

IH

Input High Voltage 0.7 V

CC

V

CC

+ 0.3 2.5 V

V

IL

Input Low Voltage GND –0.3 0.2 V

CC

1.5 V

V

OH

Output High Voltage VCC –0.4 4.7 V IOH = –2.0 mA

V

OH

Output High Voltage VCC –0.6 V I

OH

= –2.0 mA (see note 1 below.)

V

OL

Output Low Voltage .4 V IOL= 4 mA

V

OL

Output Low Voltage .8 V IOL= 4 mA (see note 1 below.)

I

OL

Output Low 10 20 mA VOL= VCC –2.2 V (see note 1, 2 below.)

I

OL

Output Leakage –1 1 <1 µAVIN = 0V, 5.25V

I

CC

VCC Supply Current 12 6 mA @ 5.0 MHz

I

CC1

Halt Mode Current 2 mA @ 5.0 MHz

I

CC2

Stop Mode Current 10 µA

R

p

Pull Up Resistor 6.76 14.04 10.4 K ohm

R

p

Pull Up Resistor (P26-P27) 1.8 3 2.4 K ohm

Notes:

* Typical @ 25°C

1. Ports P37-P34. These may be used for LEDs or as general-purpose outputs requiring high sink current.

2. V

cc = 5.0V ± 5% @ 0°C to + 70°C

Z86K13/K14/K15/K16/K17/K18
CMOS Z8® 8-Bit MCU Keyboard Controllers Zilog

8 P R E L I M I N A R Y DS97KEY0204

AC ELECTRICAL CHARACTERISTICS

TA = 0°C to 70°C

V

CC

5 MHz

No Symbol Parameter Note[4] Min Max Units Notes

1 TpC Input Clock Period 5.0V 200 250 ns 1
2 TrC,TfC Clock Input Rise & Fall Times 5.0V 25 ns 1
3 TwC Input Clock Width 5.0V 37 ns 1
4 TwTinL Timer Input Low Width 5.0V 70 ns 1
5 TwTinH Timer Input High Width 5.0V 2.5TpC 1
6 TpTin Timer Input Period 5.0V 4TpC 1
7 TrTin, Timer Input Rise & Fall Timer 5.0V 100 ns
8A TwIL Int. Request Low Time 5.0V 70 ns 1,2
8B TwIL Int. Request Low Time 5.0V 3TpC 1,3
9 TwIH Int. Request Input High Time 5.0V 3TpC 1,2
10 Twsm STOP Mode Recovery Width Spec 5.0V 5TpC ns
11 Tost Oscillator Start-up Time 5.0V 5TpC
12 T wdt Watch-Dog Timer Delay Time 5.0V 53 ms
13 T

POR

Power--On Reset 5.0V 106 130 ms

Notes:

1. Timing Reference uses 0.7 V

CC

for a logic 1 and 0.2 VCC for a logic 0.

2. Interrupt request through Port 3 (P31-P33).

3. Interrupt request through Port 3 (P30).

Figure 6. Additional Timing

Clock

1

3

4

8

2

2 3

TIN

IRQN

6

5

7

7

11

Clock

Setup

10

9

Stop

Mode

Recover

y

Sourc

e

Z86K13/K14/K15/K16/K17/K18

Zilog CMOS Z8® 8-Bit MCU Keyboard Controllers

DS97KEY0204 P R E L I M I N A R Y 9

1

PIN FUNCTIONS

RCIN. A precision resistor is connected between this pin

and the power supply to form the precision RC oscillator.
CLKOUT. This pin is the system clock of the Z8® and runs

at the frequency of the RC oscillator (Test only).

Port 0 (P07-P00). Port 0 is an 8-bit, CMOS-compatible
open-drain output (Figure 7).

Figure 7. Port 0 Configuration

Port 0

(Open-Drain

Output)

Z86KXX

8

Pad

Output

Z86K13/K14/K15/K16/K17/K18
CMOS Z8® 8-Bit MCU Keyboard Controllers Zilog

10 P R E L I M I N A R Y DS97KEY0204

Port 1 (P17-P10). Port 1 is an 8-bit CMOS compatible

open-drain output port (Figure 8).

Figure 8. Port 1 Configuration

Port 1

Open-Drain

Output

Z86KXX

Pad

Output

8

Z86K13/K14/K15/K16/K17/K18

Zilog CMOS Z8® 8-Bit MCU Keyboard Controllers

DS97KEY0204 P R E L I M I N A R Y 11

1

Port 2 (P27-P20). Port 2 is an 8-bit CMOS compatible Port

with 4-bit input, 4-bit programmable I/O (Figure 9). P20-

P25 have 10.4K (±35%) pull-up resistors. P26-P27 have

2.4K (±25%) pull-up resistors.

Figure 9. Port 2 Configuration

Open-Drain

OUT

OEN

IN

Pad

2.4K

Input

(c) Ports P26-P27

Open-Drain

OUT

OEN

IN

Pad

Input

(b) Ports P24-P25

10.4 kOhm

Pad

10.4 K

Input

Z86KXX

Input

I/O

4

(a) Ports P20-P23

VCC

VCC

VCC

Z86K13/K14/K15/K16/K17/K18
CMOS Z8® 8-Bit MCU Keyboard Controllers Zilog

12 P R E L I M I N A R Y DS97KEY0204

PIN FUNCTIONS (Continued)

Port 3 (P37-P30). Port 3 is an 8-bit, CMOS-compatible

four-fixed input (P33-P30) and four-fixed output (P37-P34)
I/O port. Port 3 inputs have 10.4 Kohm pull-up resistors.
Outputs are capable of directly driving LED.

Port 3 is configured under software control to provide four
external interrupt request signals (IRQ0-IRQ3).

Figure 10. Port 3 Configuration

Port 3

Z86KXX

Output

Pad

(a) Port 3 P34-P37

(b) Port 3 P30-P33

Input

Pad

10.4 kOhms

Z86K13/K14/K15/K16/K17/K18

Zilog CMOS Z8® 8-Bit MCU Keyboard Controllers

DS97KEY0204 P R E L I M I N A R Y 13

1

Program Memory. The 16-bit program counter addresses

4 KB of program memory space at internal locations (Fig­ure 11).

The first 12 bytes of program memory are reserved for the
interrupt vectors. These locations have six 16-bit vectors
that correspond to the five available interrupts.

Byte 12 to byte 4095* consists of on-chip, mask pro­grammed ROM. Addresses 4096* and greater are re­served. (*2048 for K13/K16, 3072 for K14/K17)

Register File. The register file (Figure 13) consists of four
I/O port registers, 188 general-purpose registers (exclud­ing P00-P03), and 11 control and status registers (R3-R0,
R191-R4, and R255-R240, respectively). The instructions
can access registers directly or indirectly through an 8-bit
address field. This allows short, 4-bit register addressing
using the Register Pointer. In the 4-bit mode, the register
file is divided into nine working-register groups, each occu­pying 16 continuous locations. The Register Pointer ad­dresses the starting location of the active working-register
group.

Figure 11. Program Memory Map

Figure 12. Register Pointer Register

12

11

10

9
8
7
6
5
4
3
2
1
0

On-Chip

ROM

Location of

First Byte of

Instruction

Executed

After RESET

Interrupt

Vector

(Lower Byte)

Interrupt

Vector

(Upper Byte)

Reserved

IRQ4
IRQ4
IRQ3
IRQ3
IRQ2
IRQ2
IRQ1
IRQ1
IRQ0
IRQ0

Reserved

65535

2048/3072/4096
2047/3071/4095

Reserved

D7 D6 D5 D4 D3 D2 D1 D0

R253 RP

Reserved

Working Register
Group

Default setting after RESET = 00000000

Figure 13. Register File Configuration

Stack Pointer (Bits 7-0)

R25

5

Reserved

Register Pointer

Program Control Flags

Interrupt Mask Register

Interrupt Request Register

Interrupt Priority Register

Reserved
Port 3 Mode
Port 2 Mode

T0 Prescaler

Timer/Counter0

Reserved

Reserved
Timer Mode

Reserved

Not Implemented

General-Purpose

Registers

Port 3
Port 2
Port 1
Port 0

R25

4

R253
R252

R251
R250
R249

R248
R247

R246
R245
R244
R243
R242

R241
R240

R 191

R3
R2

R1
R0

SPL

RP
FLAGS
IMR
IRQ
IPR

P3M
P2M
PREQ
T0

TMR

P3
P2
P1
P0

R4

LOCATION IDENTIFIERS

Note:* Will not be reset with a STOP Mode Recovery.

Z86K13/K14/K15/K16/K17/K18
CMOS Z8® 8-Bit MCU Keyboard Controllers Zilog

14 P R E L I M I N A R Y DS97KEY0204

PIN FUNCTIONS (Continued)

Figure 14. Register File Architecture

7

6543210

Working Register

Group Pointer

Reserved Register

%FF

%FO

%0F
%00

Z8 Reg. File

REGISTER POINTER

% FF
% FE
% FD
% FC
% FB
% FA
% F9
% F8

% F7
% F6

% F5
% F4
% F3
% F2
% F1
% F0

SPL
Reserved
RP
FLAGS
IMR
IRQ
IPR
Reserved
P3M
P2M
PRE0
T0
Reserved
Reserved
TMR

PORT REGISTERS

REG. GROUP (0)

REGISTER

Z8 STANDARD CONTROL REGISTERS

% (0) 03 P3
% (0) 02 P2
% (0) 01 P1
% (0) 00

P0

*
*

Reserved

Note: * Will not be reset with a

STOP Mode Recovery

Not

available

%BF

Z86K13/K14/K15/K16/K17/K18

Zilog CMOS Z8® 8-Bit MCU Keyboard Controllers

DS97KEY0204 P R E L I M I N A R Y 15

1

Counter/Timers. There is an 8-bit programmable

counter/timer (T0) driven by its own 6-bit programmable
prescaler (Figure 15).

The 6-bit prescalers can divide the input frequency of the
clock source by any integer number from 1 to 64. The pres­caler drives its counter, which decrements the value (1 to

256) on the prescaler overflow. When both the counter and
prescaler reach the end of count, a timer interrupt request,
IRQ4, is generated.

The counter can be programmed to start, stop, restart to
continue, or restart from the initial value. The counter can
also be programmed to stop upon reaching zero (single
pass mode) or to automatically reload the initial value and
continue counting (modulo-n continuous mode) The
counter, but not the prescaler, is read at any time without
disturbing its value or count mode.

Figure 15. Counter/Timers Block Diagram

PRE0

Initial Value

Register

T0

Initial Value

Register

T0

Current Value

Register

6-Bit

Down

Counter

8-bit

Down

Counter

÷ 4

IRQ4

Write Write Read

Internal Data Bus

OSC

Z86K13/K14/K15/K16/K17/K18
CMOS Z8® 8-Bit MCU Keyboard Controllers Zilog

16 P R E L I M I N A R Y DS97KEY0204

PIN FUNCTIONS (Continued)

Interrupts. The Z86K15 has five different interrupts from

five different sources. These interrupts are maskable and
prioritized (Figure 16). The five sources are divided as fol­lows: four sources are claimed by Port 3 lines P33-P30,
and the other is claimed by the counter/timer. The Interrupt
Masked Register globally or individually enables or dis­ables the five interrupts requests.

When more than one interrupt is pending, priorities are re­solved by a programmable priority encoder that is con­trolled by the Interrupt Priority register. All interrupts are
vectored through locations in the program memory. When
an interrupt machine cycle is activated an interrupt request
is granted. Thus, this disables all of the subsequent inter­rupts, saves the Program Counter and status flags, and
then branches to the program memory vector location re­served for that interrupt. This memory location and the
next byte contain the 16-bit address of the interrupt service
routine for that particular interrupt request.

To accommodate polled interrupt systems, interrupt inputs
are masked and the interrupt request register is polled to
determine which of the interrupt request needs service.

RC Oscillator. The Z86K13/14/15 provides an internal ca­pacitor to accommodate an RC oscillator configuration. A
1% precision resistor is necessary to achieve ±10% accu­rate frequency oscillation.

The Z86K15 also accepts external clock from (RCIN) with
(AGND) connected to V

CC

(Figure 17).

Figure 16. Interrupt Block Diagram

IRQ

IMR

Priority

Logic

Global

Interrupt

Enable

Vector Select

Interrupt
Request

5

IRQ0-IRQ4

5

IPR

Figure 17. RC Oscillator Configuration

RCIN

NC

1%
Precision

CLKOUT

VCC

RC Oscillator

External Clock

RCIN

AGND

VCC

Z86K13/K14/K15/K16/K17/K18

Zilog CMOS Z8® 8-Bit MCU Keyboard Controllers

DS97KEY0204 P R E L I M I N A R Y 17

1

Watch-Dog Timer. The Watch-Dog Timer is activated au-

tomatically by power-on if it is enabled in the Mask Option.
The WDT is a retriggerable one-shot timer that resets the
Z8 if it reaches its terminal count. The WDT is driven by the
system clock. It must be refreshed at least once during
each time cycle by executing the WDT instruction. WDT
can be enabled by Mask Option. (Figure 18)

WDT Hot bit. Bit 7 of the Interrupt Request register (IRQ
register FAH) determines whether a hot start or cold start
occurred. A cold start is defined as reset occurring from

power-up of the Z86K15 (the default upon power-up is 0).
A hot start occurs when a WDT time-out has occurred (bit
7 is set to 1). Bit 7 of the IRQ register is read-only and is
automatically reset to 0 when read.

Watch-Dog Timer . The WDT time-out is .
WDT During HALT (D5-R250). This bit determines wheth-

er or not the WDT is active during HALT Mode. The default
is 1, and a 1 indicates active during HALT.

294912ms

fHz()

----------------------------

Figure 18. WDT Turn-On Timing After Reset

VCC

Internal

Reset

POR

Reset
Delay

* Reset Delay = POR 147 ms ±10% at 4 MHz.

18 Tpc

Z86K13/K14/K15/K16/K17/K18
CMOS Z8® 8-Bit MCU Keyboard Controllers Zilog

18 P R E L I M I N A R Y DS97KEY0204

PIN FUNCTIONS (Continued)

Power-On-Reset (POR). A timer circuit is triggered by the

system oscillator and is used for the Power-On Reset
(POR) timer function. The POR time allows VCC and the os­cillator circuit to stabilize before instruction execution be­gins. POR period is defined as:

The POR timer circuit is a one-shot timer triggered by one
of two conditions:

1. Power fail to Power OK status

2. Stop-Mode Recovery
The POR time is a nominal 147 ms ±10%. At 4 MHz the

POR timer is bypassed after Stop-Mode Recovery.
HALT. HALT turns off the internal CPU clock, but not the

RC oscillator. The counter/timer and external interrupts
IRQ0, IRQ1, IRQ2, and IRQ3 remain active. The Z86K15
is recovered by interrupts, either externally or internally
(Figure 19).

STOP. This instruction turns off the internal clock and os­cillator. It reduces the standby current to less than 10 µA.
The STOP Mode is terminated by a reset only or external
reset. This causes the processor to restart the application
program at address 000C (HEX) or the active external in­terrupt vector. In order to enter STOP (or HALT) Mode, it
is necessary to first flush the instruction pipeline to avoid
suspending execution in mid-instruction. To do this, the
user must execute a NOP (Opcode=FFH) immediately be­fore the appropriate sleep instruction, such as:

The Bit 6 of IRQ Registers are flags for STOP Mode Re­covery (Figure 20).

Cold or Warm Start (D6). This bit is set upon entering
STOP Mode. A 0 (cold) indicates that the device is awak­ened by a POR/WDT RESET. A 1 (warm) indicates that
the device is awakened by a SMR source. This bit is reset
when read.

Negative transition on any of the designated row input pins
or host data line will recover Z86KXX from STOP Mode.

POR (ms) = 589824

f

(Hz)

FF NOP ; clear the pipeline
6F STOP ; enter STOP Mode

or
FF NOP ; clear the pipeline
7F HALT ; enter HALT Mode

Figure 19. IRQ Register

D7 D6 D5 D4 D3 D2 D1 D0

R250 IRQ

IRQ0 = P32 Input
IRQ1 = P33 Input
IRQ2 = P31 Input
IRQ3 = P30 Input
IRQ4 = TO

WDT during HALT
0 OFF *
1 ON

Stop Flag
0 POR/WDT*
1 Stop Recovery

* On RESET

WDT Hot Bit (Read Only)
0 POR*
1 WDT Timeout

Figure 20. Stop-Mode Recovery Source

To Internal
RESET

P20-P26,
P30-P33

Z86K13/K14/K15/K16/K17/K18

Zilog CMOS Z8® 8-Bit MCU Keyboard Controllers

DS97KEY0204 P R E L I M I N A R Y 19

1

Z8® CONTROL REGISTER DIAGRAMS

Figure 21. Timer Mode Register

(F1H: Read/Write)

Counter/Timer 0 Register

Figure 22. (F4H: Read/Write)

Prescaler 0 Register

Figure 23. (F5

H

: Write Only)

D7 D6 D5 D4 D3 D2 D1 D0

0 = Disable T0 Count
1 = Enable T0 Count

0 = No Function
1 = Load T0

R241 TMR

Reserved (Must be 0)

D7 D6 D5 D4 D3 D2 D1 D0

T0 Initial Value
(When WRITE)
(Range: 1-256 Decimal
01-00 HEX)
T0 Current Value
(When READ)

R244 T0

D7 D6 D5 D4 D3 D2 D1 D0

Count Mode

0

0 = T Single Pass
1 = T Modulo N

0

Reserved (Must be 0)
Prescaler Modulo

(Range: 1-64 Decimal
01-00 HEX)

R245 PRE0

Port 2 Mode Register

Figure 24. (F6H: Write Only)

Port 2 Open Drain Mode Register

Figure 25. (F7

H

: Write Only)

Figure 26. Interrupt Priority Register

(F9

H

: Write Only)

D7 D6 D5 D4 D3 D2 D1 D0

P24-P27 I/O Definition
0 Defines Bit as OUTPU

T

1 Defines Bit as INPUT

R246 P2M

Reserved

D7 D6 D5 D4 D3 D2 D1 D0

0 Port (24-27) Open-Drain
1 Port (24-27) Push-Pull

Reserved (Must be 0)

R247 P3M

D7 D6 D5 D4 D3 D2 D1 D0

Interrupt Group Priority

Reserved = 000
C > A > B = 001
A > B > C = 010
A > C > B = 011
B > C > A = 100
C > B > A = 101
B > A > C = 110
Reserved = 111

Reserved

IRQ0, IRQ2 Priority (Group B)

0 = IRQ2 > IRQ0
1 = IRQ0 > IRQ2

IRQ1, IRQ4 Priority (Group C)

0 = IRQ1 > IRQ4
1 = IRQ4 > IRQ1

Reserved (Must be 0)

R249 IPR

Z86K13/K14/K15/K16/K17/K18
CMOS Z8® 8-Bit MCU Keyboard Controllers Zilog

20 P R E L I M I N A R Y DS97KEY0204

Figure 27. Interrupt Request Register

(FA

H

: Read/Write)

Figure 28. Interrupt Mask Register

(FB

H

: Read/Write)

D7 D6 D5 D4 D3 D2 D1 D0

R250 IRQ

IRQ0 = P32 Input
IRQ1 = P33 Input
IRQ2 = P31 Input
IRQ3 = P30 Input
IRQ4 = TO

Stop Delay
0 OFF *
1 ON

Stop Flag
0 POR/WDT*
1 Stop Recovery

* On RESET

WDT Hot Bit (Read Only)
0 POR*
1 WDT Timeout

D7 D6 D5 D4 D3 D2 D1 D0

Reserved (Must be 0)

1 Enables IRQ0-IRQ4
(D0= IRQ0)

1 Enables Interrupts

R251 IMR

Figure 29. Flag Register

(FCH: Read/Write)

Register Pointer

Figure 30. (FDH: Read/Write)

Stack Pointer

Figure 31. (FF

H

: Read/Write)

D7 D6 D5 D4 D3 D2 D1 D0

User Flag F1
User Flag F2
Half Carry Flag
Decimal Adjust Flag
Overflow Flag
Sign Flag
Zero Flag
Carry Flag

R252 Flags

D7 D6 D5 D4 D3 D2 D1 D0

Working Registers
r4

R253 RP

r5
r6
r7

Register
Pointer

D7 D6 D5 D4 D3 D2 D1 D0

Stack Pointer Lower
Byte (SP0-SP7)

R255 SPL

Z86K13/K14/K15/K16/K17/K18

Zilog CMOS Z8® 8-Bit MCU Keyboard Controllers

DS97KEY0204 P R E L I M I N A R Y 21

1

PACKAGE INFORMATION

Figure 32. 40-Pin DIP Package Diagram

Figure 33. 44-Pin PLCC Package Diagram

Z86K13/K14/K15/K16/K17/K18
CMOS Z8® 8-Bit MCU Keyboard Controllers Zilog

22 P R E L I M I N A R Y DS97KEY0204

Figure 34. 44-Pin QFP Package Diagram

Z86K13/K14/K15/K16/K17/K18

Zilog CMOS Z8® 8-Bit MCU Keyboard Controllers

DS97KEY0204 P R E L I M I N A R Y 23

1

ORDERING INFORMATION

For fast results, contact your local Zilog sales office for assistance in ordering the part desired.

CODES
Package

P = Plastic DIP
V = Plastic Leaded Chip Carrier
F = Quad Flat Pack

Speed

05 = 5 MHz

Environmental

C = Plastic Standard

Temperature

S = 0°C to +70°C

© 1997 by Zilog, Inc. All rights reserved. No part of this
document may be copied or reproduced in any form or by
any means without the prior written consent of Zilog, Inc.
The information in this document is subject to change
without notice. Devices sold by Zilog, Inc. are covered by
warranty and patent indemnification provisions appearing
in Zilog, Inc. Terms and Conditions of Sale only. Zilog, Inc.
makes no warranty, express, statutory, implied or by
description, regarding the information set forth herein or
regarding the freedom of the described devices from
intellectual property infringement. Zilog, Inc. makes no
warranty of merchantability or fitness for any purpose.
Zilog, Inc. shall not be responsible for any errors that may
appear in this document. Zilog, Inc. makes no commitment
to update or keep current the information contained in this
document.

Zilog’s products are not authorized for use as critical
components in life support devices or systems unless a
specific written agreement pertaining to such intended use
is executed between the customer and Zilog prior to use.
Life support devices or systems are those which are
intended for surgical implantation into the body, or which
sustains life whose failure to perform, when properly used
in accordance with instructions for use provided in the
labeling, can be reasonably expected to result in
significant injury to the user.

Zilog, Inc. 210 East Hacienda Ave.
Campbell, CA 95008-6600
Telephone [phone]
FAX [phone]
Internet: http://www.zilog.com

5 MHz 5 MHz 5 MHz

40-Pin DIP 44-Pin PLCC 44-Pin QFP

Z86KXX05PSC Z86KXX05VSC Z86KXX05FSC

Example:
Z 86K15 05 P S C is a Z86K15, 05 MHz, DIP, 0° to +70°C, Plastic Standard Flow

Environmental Flow

Temperature
Package
Speed
Product Number
Zilog Prefix

Z86K13/K14/K15/K16/K17/K18
CMOS Z8® 8-Bit MCU Keyboard Controllers Zilog

24 P R E L I M I N A R Y DS97KEY0204