ZILOG Z86C0412PSC, Z86C0412SAC, Z86C0412SEC, Z86C0412SSC, Z86C0412PAC Datasheet

DS97DZ80502

P R E L I M I N A R Y

1

1

P

RELIMINARY

P

RODUCT

S

PECIFICATION

Z86C04/C08

1

CMOS 8-B

IT

L

OW

-C

OST

1K/2K-ROM M

ICROCONTROLLERS

FEATURES

■

18-Pin DIP and SOIC Packages

■

3.0V to 5.5V Operating Range

■

Available Temperature Ranges
A = –40 ° C to +125 ° C
E = –40 ° C to +105 ° C
S = 0 ° C to +70 ° C

■

14 Input / Output Lines

■

Six Vectored, Prioritized Interrupts from Six Different
Sources

■

Two On-Board Comparators

■

ROM Mask Options:
– Low Noise
– ROM Protect
– Auto Latch
– System Clock Driving WDT (Z86C04 only)

– Permanent Watch-Dog Timer (WDT)
– RC Oscillator
– 32 kHz Operation

■

Two Programmable 8-Bit Counter/Timers,
Each with 6-Bit Programmable Prescaler

■

Power-On Reset (POR) Timer

■

On-Chip Oscillator that Accepts RC, Crystal,
Ceramic Resonance, LC, or External Clock Drive

■

Clock-Free WDT Reset

■

Low-Power Consumption (50mw)

■

Fast Instruction Pointer
(1.0 µ s @ 12 MHz)

■

Fourteen Digital Inputs at CMOS Levels;
Schmitt-Triggered

■

Software Enabled Watch-Dog Timer

■

Programmable Interrupt Polarity

■

Two Standby Modes: STOP and HALT

■

Low-Voltage Protection

GENERAL DESCRIPTION

Zilog’s Z86C04/C08 are members of the Z8

®

MCU single­chip microcontroller family which offer easy software/hard­ware system expansion .

For applications demanding powerful I/O capabilities, the
Z86C04/C08’s dedicated input and output lines are
grouped into three ports, and are configurable under soft­ware control to provide timing, status signals, or parallel
I/O.

Two on-chip counter/timers, with a large number of user
selectable modes, off-load the system of administering
real-time tasks such as counting/timing and I/O data com­munications. Additionally, two on-board comparators pro­cess analog signals with a common reference voltage (Fig­ure 1).

Part

Number

ROM

(KB)

RAM*

(Bytes)

Speed

(MHz)

Auto

Latch

Permanent

WDT

Z86C04
Z86C0812

125
125

1212Optional

Optional

Optional
Optional

Note: * General-Purpose

Z86C04/C08
CMOS 8-Bit Low-Cost 1K/2K-ROM Microcontrollers Zilog

2

P R E L I M I N A R Y

DS97DZ80502

GENERAL DESCRIPTION (Continued)

Note: 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

V

CC

GND

V

DD

V

SS

Figure 1. Z86C04/C08

Functional Block Diagram

Port 3

Counter/

Timers (2)

Interrupt

Control

T wo Analog

Comparators

Port 2

I/O

(Bit Programmable)

ALU

FLAG

Register

Pointer

Register File

Machine

Timing & Inst.

Control

Prg. Memory

Program

Counter

Vcc GND XTALVcc

Input

Port 0

I/O

Z86C04/C08

Zilog CMOS 8-Bit Low-Cost 1K/2K-ROM Microcontrollers

DS97DZ80502

P R E L I M I N A R Y

3

1

PIN DESCRIPTIONS

Figure 2. 18-Pin DIP Configuration

1
2

9

3
4
5
6
7
8

18
17
16
15
14
13
12
11
10

P23
P22

P33

P21
P20
GND
P02
P01
P00

P24
P25

P32

P26
P27

VCC

XTAL2

XTAL1

P31

DIP

Table 1: 18-Pin DIP and SOIC Pin Identification

Pin # Symbol Function Direction

1-4

5
6
7
8

P24-P27

V

CC

XTAL2
XTAL1

P31

Port 2, Pins 4, 5, 6, 7
Power Supply
Crystal Oscillator Clock
Crystal Oscillator Clock
Port 3, Pin 1, AN1

In/Output

Output

Input
Input

9

10

11-13

14

15-18

P32
P33

P00-P02

GND

P20-P23

Port 3, Pin 2, AN2
Port 3, Pin 3, REF
Port 0, Pins 0, 1, 2
Ground
Port 2, Pins 0, 1, 2, 3

Input
Input

In/Output
In/Output

Figure 3. 18-Pin SOIC Pin Configuration

1

18

P24

P27

Vcc
XTAL2
XTAL1

P31
P32

P23
P22
P21
P20
GND
P02
P01
P00

P33

SOIC

P25
P26

2
3
4
5

6
7

8
9

17
16

15

14

13
12
11
10

Z86C04/C08
CMOS 8-Bit Low-Cost 1K/2K-ROM Microcontrollers Zilog

4

P R E L I M I N A R Y

DS97DZ80502

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; functional 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 an ex-

tended period may affect device reliability. Total power
dissipation should not exceed 462 mW for the package.
Power dissipation is calculated as follows:
Total Power dissipation = V

DD

x [I

DD

– (sum of I

OH

)] + sum of

[(V

DD

– V

OH

) x I

OH

] + sum of (V

0L

x I

0L

).

STANDARD TEST CONDITIONS

The characteristics listed below apply for standard test
conditions as noted. All voltages are referenced to
Ground. Positive current flows into the referenced pin
(Figure 4).

Parameter Min Max Units

Ambient Temperature under Bias –40 +105 C
Storage Temperature –65 +150 C
Voltage on any Pin with Respect to V

SS

[Note 1] –0.7 +12 V

Voltage on V

DD

Pin with Respect to V

SS

–0.3 +7 V

Voltage on Pin 7 with Respect to V

SS

[Note 2] –0.7 V

DD

+1 V
Total Power Dissipation 462 mW
Maximum Current out of V

SS

84 mA

Maximum Current into V

DD

84 mA

Maximum Current into an Input Pin [Note 3] –600 +600

µ

A

Maximum Current into an Open-Drain Pin [Note 4] –600 +600

µ

A
Maximum Output Current Sinked by Any I/O Pin 12 mA
Maximum Output Current Sourced by Any I/O Pin 12 mA
Total Maximum Output Current Sinked by Port 2 70 mA
Total Maximum Output Current Sourced by Port 2 70 mA

Notes:

1. This applies to all pins except where otherwise noted. Maximum current into pin must be ± 600 µ A.

2. There is no input protection diode from pin to V

DD

.

3. This excludes Pin 6 and Pin 7.

4. Device pin is not at an output Low state.

Figure 4. Test Load Diagram

From Output

Under Test

150 pF

Z86C04/C08

Zilog CMOS 8-Bit Low-Cost 1K/2K-ROM Microcontrollers

DS97DZ80502

P R E L I M I N A R Y

5

1

CAPACITANCE

T

A

= 25 ° C, V

CC

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

DC ELECTRICAL CHARACTERISTICS

Parameter Min Max

Input capacitance 0 15 pF

Output capacitance 0 20 pF

I/O capacitance 0 25 pF

T

A

= –40 ° C

to +125 ° C

Typical

Sym Parameter

V

CC

[4]

Min Max @ 25 ° C Units Conditions Notes

V

CH

Clock Input High
Voltage

3.0V 0.8 V

CC

V

CC

+0.3 1.7 V Driven by External

Clock Generator

5.5V 0.8 VCCVCC+0.3 2.8 V Driven by External
Clock Generator

V

CL

Clock Input Low
Voltage

3.0V VSS–0.3 0.2 V

CC

0.8 V Driven by External
Clock Generator

5.5V VSS–0.3 0.2 V

CC

1.7 V Driven by External
Clock Generator

V

IH

Input High Voltage 3.0V 0.7 V

CCVCC

+0.3 1.8 V 1

5.5V 0.7 V

CCVCC

+0.3 2.8 V 1

V

IL

Input Low Voltage 3.0V VSS–0.3 0.2 V

CC

0.8 V 1

5.5V V

SS

–0.3 0.2 V

CC

1.5 V 1

V

OH

Output High
Voltage

3.0V VCC–0.4 3.0 V IOH = –2.0 mA 5

5.5V V

CC

–0.4 4.8 V IOH = –2.0 mA 5

3.0V V

CC

–0.4 3.0 V Low Noise @ I

OH

= –0.5 mA

5.5V V

CC

–0.4 4.8 V Low Noise @ IOH = –0.5 mA

V

OL1

Output Low Voltage 3.0V 0.8 0.2 V IOL = +4.0 mA 5

5.5V 0.6 0.1 V I

OL

= +4.0 mA 5

3.0V 0.6 0.2 V Low Noise @ I

OL

= 1.0 mA

5.5V 0.6 0.1 V Low Noise @ I

OL

= 1.0 mA

V

OL2

Output Low Voltage 3.0V 1.2 0.8 V IOL = +12 mA 5

5.5V 1.0 0.3 V I

OL

= +12 mA 5

V

OFFSET

Comparator Input
Offset V oltage

3.0V 25 10 mV

5.5V 25 10 mV

V

LV

VCC Low Voltage
Auto Reset

1.8 3.0 2.6 V Int. CLK Freq @ 2 MHz Max.

I

IL

Input Leakage
(Input Bias
Current of
Comparator)

3.0V –1.0 1.0 µAVIN = 0V, V

CC

5.5 –1.0 1.0 µAVIN = 0V, V

CC

I

OL

Output Leakage 3.0V –1.0 1.0 µAVIN = 0V, V

CC

5.5V –1.0 1.0 µAVIN = 0V, Vcc

Z86C04/C08
CMOS 8-Bit Low-Cost 1K/2K-ROM Microcontrollers Zilog

6 P R E L I M I N A R Y DS97DZ80502

DC ELECTRICAL CHARACTERISTICS (Continued)

V

VICR

Comparator Input
Common Mode
Voltage Range

0VCC –1.5 V

I

CC

Supply Current 3.0V 3.5 1.5 mA All Output and I/O Pins Floating

@ 2 MHz

5,7

5.5V 7.0 3.8 mA All Output and I/O Pins Floating
@ 2 MHz

5,7

3.0V 8.0 3.0 mA All Output and I/O Pins Floating
@ 8 MHz

5,7

5.5V 11.0 4.4 mA All Output and I/O Pins Floating
@ 8 MHz

5,7

3.0V 10 3.6 mA All Output and I/O Pins Floating
@ 12 MHz

5,7

5.5V 15 9.0 mA All Output and I/O Pins Floating
@ 12 MHz

5,7

I

CC1

Standby Current 3.0V 2.5 0.7 mA HALT mode V

IN

= 0V,

VCC @ 2 MHz

5,7

5.5V 4.0 2.5 mA HALT mode V

IN

= 0V,

V

CC

@ 2 MHz

5,7

3.0V 4.0 1.0 mA HALT mode V

IN

= 0V,

VCC @ 8 MHz

5,7

5.5V 5.0 3.0 mA HALT mode V

IN

= 0V,

VCC @ 8 MHz

5,7

3.0V 4.5 1.5 mA HALT mode V

IN

= 0V,

VCC @ 12 MHz

5,7

5.5V 7.0 4.0 mA HALT mode V

IN

= 0V,

VCC @ 12 MHz

5,7

I

CC

Supply Current
(Low Noise Mode)

3.0V 3.5 1.5 mA All Output and I/O Pins Floating
@ 1 MHz

7

5.5V 7.0 3.8 mA All Output and I/O Pins Floating
@ 1 MHz

7

3.0V 5.8 2.5 mA All Output and I/O Pins Floating
@ 2 MHz

7

5.5V 9.0 4.0 mA All Output and I/O Pins Floating
@ 2 MHz

7

3.0V 8.0 3.0 mA All Output and I/O Pins Floating
@ 4 MHz

7

5.5V 11.0 4.4 mA All Output and I/O Pins Floating
@ 4 MHz

7

Z86C04/C08
CMOS 8-Bit Low-Cost 1K/2K-ROM Microcontrollers Zilog

7 P R E L I M I N A R Y DS97DZ80502

DC ELECTRICAL CHARACTERISTICS (Continued)

T

A

= –40°C

to +125°C

Typical

Sym Parameter

V

CC

[4]

Min Max @ 25°C Units Conditions Notes

I

CC1

Standby Current
(Low Noise Mode)

3.0V 2.5 0.7 mA HALT mode V

IN

= 0V, VCC @ 1MHz 7

5.5V 4.0 2.5 mA HALT mode V

IN

= 0V, VCC @ 1MHz

3.0V 3.0 0.9 mA HALT mode V

IN

= 0V, VCC @ 2 MHz 7

5.5V 4.5 2.8 mA HALT mode V

IN

= 0V, VCC @ 2 MHz 7

3.0V 4.0 1.0 mA HALT mode V

IN

= 0V, VCC @ 4 MHz 7

5.5V 5.0 3.0 mA HALT mode V

IN

= 0V, VCC @ 4 MHz 7

I

CC2

Standby Current 3.0V 20 1.0 µA STOP mode VIN = 0V, VCC ;WDT is not

Running

7

5.5V 20 1.0 µA STOP mode V

IN

= 0V, VCC ;WDTis not

Running

7

I

ALL

Auto Latch Low Current 3.0V 8.0 3.0 µA 0V < VIN < V

CC

5.5V 30 16 µA 0V < VIN < V

CC

I

ALH

Auto Latch High Current 3.0V –5.0 –1.5 µA 0V < VIN < V

CC

5.5V –20 –8.0 µA 0V < VIN < V

CC

Notes:

1. Port 0, 2, and 3 only.

2. V

SS

= 0V = GND.

3. The device operates down to V

LV

. The minimum operational VCC is determined on the value of the voltage VLV at the ambient

temperature. The V

LV

increases as the temperature decreases.

4. V

CC

= 3.0V to 5.5V, typical values measured at VCC = 3.3V and VCC = 5.0V.

5. Standard Mode (not Low EMI mode).

6. Z86C08 only.

7. Inputs at power rail and outputs are unloaded.

Z86C04/C08
CMOS 8-Bit Low-Cost 1K/2K-ROM Microcontrollers Zilog

8 P R E L I M I N A R Y DS97DZ80502

DC ELECTRICAL CHARACTERISTICS (Continued)

TA= 0°C to

+70°C

TA= –40°C to

+105°C

Typical

Symbol Parameter

V

CC

Min Max Min Max @ 25°C Units Conditions Notes

V

CH

Clock Input High
Voltage

3.0V 0.8 VCCVCC+0.3 0.8 VCCVCC+0.3 1.7 V Driven by External
Clock Generator

5.5V 0.8 VCCVCC+0.3 0.8 VCCVCC+0.3 2.8 V Driven by External
Clock Generator

V

CL

Clock Input Low
Voltage

3.0V VSS–0.3 0.2 VCCVSS–0.3 0.2 V

CC

0.8 V Driven by External
Clock Generator

5.5V VSS–0.3 0.2 VCCVSS–0.3 0.2 V

CC

1.7 V Driven by External
Clock Generator

V

IH

Input High Voltage 3.0V 0.7 VCCVCC+0.3 0.7 VCCVCC+0.3 1.8 V 1

5.5V 0.7 V

CCVCC

+0.3 0.7 VCCVCC+0.3 2.8 V 1

V

IL

Input Low Voltage 3.0V VSS–0.3 0.2 VCCVSS–0.3 0.2 V

CC

0.8 V 1

5.5V V

SS

–0.3 0.2 VCCVSS–0.3 0.2 V

CC

1.5 V 1

V

OH

Output High Voltage 3.0V VCC–0.4 VCC–0.4 3.0 V IOH = –2.0 mA 5

5.5V V

CC

–0.4 VCC–0.4 4.8 V IOH = –2.0 mA 5

3.0V V

CC

–0.4 VCC–0.4 3.0 V Low Noise @

IOH = –0.5 mA

5.5V V

CC

–0.4 VCC–0.4 4.8 V Low Noise @

IOH = –0.5 mA

V

OL1

Output Low Voltage 3.0V 0.8 0.8 0.2 V IOL= +4.0 mA 5

5.5V 0.4 0.4 0.1 V I

OL

= +4.0 mA 5

3.0V 0.4 0.4 0.2 V Low Noise @
I

OL

= 1.0 mA

5.5V 0.4 0.4 0.1 V Low Noise @
I

OL

= 1.0 mA

V

OL2

Output Low Voltage 3.0V 1.0 1.0 0.8 V IOL = +12 mA 5

5.5V 0.8 0.8 0.3 V I

OL

= +12 mA 5

V

OFFSET

Comparator Input
Offset V oltage

3.0V 25 25 10 mV

5.5V 25 25 10 mV

V

LV

VCC Low Voltage
Auto Reset

2.2 2.8 2.6 V Int. CLK Freq @
6 MHz Max.

2.0 3.0 2.6 V Int. CLK Freq @
4 MHz Max.

I

IL

Input Leakage
(Input Bias Current
of Comparator)

3.0V –1.0 1.0 –1.0 1.0 µAVIN = 0V, V

CC

5.5V –1.0 1.0 –1.0 1.0 µAVIN = 0V, V

CC

I

OL

Output Leakage 3.0V –1.0 1.0 –1.0 1.0 µAVIN = 0V, V

CC

5.5V –1.0 1.0 –1.0 1.0 µAVIN = 0V, V

CC

V

VICR

Comparator Input
Common Mode
Voltage Range

0VCC–1.0 0 VCC–1.5 V

Z86C04/C08
CMOS 8-Bit Low-Cost 1K/2K-ROM Microcontrollers Zilog

9 P R E L I M I N A R Y DS97DZ80502

DC ELECTRICAL CHARACTERISTICS (Continued)

Icc

Supply Current 3.0V 3.5 3.5 1.5 mA All Output and I/O

Pins Floating @
2 MHz

5,7

5.5V 7.0 7.0 3.8 mA All Output and I/O
Pins Floating @
2 MHz

5,7

3.0V 8.0 8.0 3.0 mA All Output and I/O
Pins Floating @
8 MHz

5,7

5.5V 11.0 11.0 4.4 mA All Output and I/O
Pins Floating @
8 MHz

5,7

3.0V 10 10 3.6 mA All Output and I/O
Pins Floating @
12 MHz

5,7

5.5V 15 15 9.0 mA All Output and I/O
Pins Floating @
12 MHz

5,7

I

CC1

Standby Current 3.0V 2.5 2.5 0.7 mA HALT mode V

IN

= 0V ,

VCC @ 2 MHz

5,7

5.5V 4.0 4.0 2.5 mA HAL T mode V

IN

= 0V ,

VCC @ 2 MHz

5,7

3.0V 4.0 4.0 1.0 mA HAL T mode V

IN

= 0V ,

VCC @ 8 MHz

5,7

5.5V 5.0 5.0 3.0 mA HAL T mode V

IN

= 0V ,

V

CC

@ 8 MHz

5,7

3.0V 4.5 4.5 1.5 mA HAL T mode V

IN

= 0V ,

VCC @ 12 MHz

5,7

5.5V 7.0 7.0 4.0 mA HAL T mode V

IN

= 0V ,

VCC @ 12 MHz

5,7

T

A

= 0°C to
+70°C

TA= –40°C to

+105°C

Typical

Symbol Parameter

V

CC

Min Max Min Max @ 25°C Units Conditions Notes

Z86C04/C08
CMOS 8-Bit Low-Cost 1K/2K-ROM Microcontrollers Zilog

10 P R E L I M I N A R Y DS97DZ80502

DC ELECTRICAL CHARACTERISTICS (Continued)

I

CC

Supply Current
(Low Noise)

3.0V 3.5 3.5 1.5 mA All Output and I/O
Pins Floating @
1 MHz

7

5.5V 7.0 7.0 3.8 mA All Output and I/O
Pins Floating @
1 MHz

7

3.0V 5.8 5.8 2.5 mA All Output and I/O
Pins Floating @
2 MHz

7

5.5V 9.0 9.0 4.0 mA All Output and I/O
Pins Floating @
2 MHz

7

3.0V 8.0 8.0 3.0 mA All Output and I/O
Pins Floating @
4 MHz

7

5.5V 11.0 11.0 4.4 mA All Output and I/O
Pins Floating @
4 MHz

7

T

A

= 0°C to
+70°C

TA= –40°C to

+105°C

Typical

Symbol Parameter

V

CC

Min Max Min Max @ 25°C Units Conditions Notes

Z86C04/C08

Zilog CMOS 8-Bit Low-Cost 1K/2K-ROM Microcontrollers

DS97DZ80502 P R E L I M I N A R Y 11

1

I

CC1

Standby Current
(Low Noise Mode)

3.0V 2.5 2.5 0.7 mA HAL T mode V

IN

= 0V ,

VCC @ 2 MHz

5,7

5.5V 4.0 4.0 2.5 mA HAL T mode V

IN

= 0V ,

V

CC

@ 2 MHz

5,7

3.0V 3.0 3.0 0.9 mA HAL T mode V

IN

= 0V ,

VCC @ 8 MHz

5,7

5.5V 4.5 4.5 2.8 mA HAL T mode V

IN

= 0V ,

VCC @ 8 MHz

5,7

3.0V 4.0 4.0 1.0 mA HAL T mode V

IN

= 0V ,

VCC @ 12 MHz

5,7

5.5V 5.0 5.0 3.0 mA HAL T mode V

IN

= 0V ,

VCC @ 12 MHz

5,7

I

CC2

Standby Current 3.0V 10 20 1.0 µA STOP mode VIN =

0V,Vcc WDT is not
Running

7

5.5V 10 20 1.0 µA STOP mode VIN =
0V,Vcc WDT is not

Running

7

I

ALL

Auto Latch Low
Current

3.0V 12 8.0 3.0 µA 0V < VIN < V

CC

5.5V 32 30 16 µA 0V < VIN < V

CC

I

ALH

Auto Latch High
Current

3.0V –8 –5.0 –1.5 µA 0V < VIN < V

CC

5.5V –16 –20 –8.0 µA 0V < VIN < V

CC

Notes:

1. Port 0, 2, and 3 only.

2. V

SS

= 0V = GND.

3. The device operates down to V

LV

. The minimum operational VCC is determined on the value of the voltage VLV at the ambient

temperature. The V

LV

increases as the temperature decreases.

4. V

CC

= 3.0V to 5.5V, typical values measured at VCC = 3.3V and VCC = 5.0V.

5. Standard Mode (not Low EMI mode).

6. Z86C08 only.

7. Inputs at power rail and outputs are unloaded.

TA= 0°C to

+70°C

TA= –40°C to

+105°C

Typical

Symbol Parameter

V

CC

Min Max Min Max @ 25°C Units Conditions Notes

Z86C04/C08
CMOS 8-Bit Low-Cost 1K/2K-ROM Microcontrollers Zilog

12 P R E L I M I N A R Y DS97DZ80502

Figure 5. AC Electrical Timing Diagram

1

3

4

8

223

T

IRQ

IN

N

6

5

7

7

9

Clock

Z86C04/C08

Zilog CMOS 8-Bit Low-Cost 1K/2K-ROM Microcontrollers

DS97DZ80502 P R E L I M I N A R Y 13

1

AC ELECTRICAL CHARACTERISTICS

Timing Table (Standard Mode for SCLK/TCLK = XTAL/2)

TA = -40C to +125C
8 MHz 12 MHz

No Symbol Parameter

V

CC

Min Max Min Max Units Notes

1 TpC Input Clock Period 3.0V 125 DC 83 DC ns 1

5.5V 125 DC 83 DC ns 1

2 TrC,TfC Clock Input Rise

and Fall Times

3.0V 25 15 ns 1

5.5V 25 15 ns 1

3 TwC Input Clock Width 3.0V 62 41 ns 1

5.5V 62 41 ns 1

4 TwTinL Timer Input Low Width 3.0V 100 100 ns 1

5.5V 70 70 ns 1

5 TwTinH Timer Input High Width 3.0V 5TpC 5TpC 1

5.5V 5TpC 5TpC 1

6 TpTin Timer Input Period 3.0V 8TpC 8TpC 1

5.5V 8TpC 8TpC 1

7 TrTin,

TtTin

Timer Input Rise
and Fall Time

3.0V 100 100 ns 1

5.5V 100 100 ns 1

8 TwIL Int. Request Input

Low Time

3.0V 100 100 ns 1,2

5.5V 70 70 ns 1,2

9 TwIH Int. Request Input

High Time

3.0V 5TpC 5TpC 1

5.5V 5TpC 5TpC 1,2

10 Twdt Watch-Dog Timer

Delay Time Before
Timeout

3.0V 25 25 ms

5.5V 10 10 ms

11 Tpor Power-On Reset Time 3.0V 50 180 50 180 ms 3

5.5V 20 100 20 100 ms 3

3.0V 4 60 4 60 ms 4

5.5V 2 30 2 30 ms 4

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 (P33-P31).

3. Z86C08.

4. Z86C04

Z86C04/C08
CMOS 8-Bit Low-Cost 1K/2K-ROM Microcontrollers Zilog

14 P R E L I M I N A R Y DS97DZ80502

T

A

= 0°C to +70°C

T

A

= -40°C to +105°C

8 MHz 12 MHz 8 MHz 12 MHz

No Symbol Parameter

V

CC

Min Max Min Max Min Max Min Max Units Notes

1 TpC Input Clock Period 3.0V 125 DC 83 DC 125 DC 83 DC ns 1

5.5V 125 DC 83 DC 125 DC 83 DC ns 1

2 TrC,TfC Clock Input Rise

and Fall Times

3.0V 25 15 25 15 ns 1

5.5V 25 15 25 15 ns 1

3 TwC Input Clock Width 3.0V 62 41 62 41 ns 1

5.5V 62 41 62 41 ns 1

4 TwTinL Timer Input Low

Width

3.0V 100 100 100 100 ns 1

5.5V 70 70 70 70 ns 1

5 TwTinH Timer Input High

Width

3.0V 5TpC 5TpC 5TpC 5TpC 1

5.5V 5TpC 5TpC 5TpC 5TpC 1

6 TpTin Timer Input Period 3.0V 8TpC 8TpC 8TpC 8TpC 1

5.5V 8TpC 8TpC 8TpC 8TpC 1

7 TrTin,

TtTin

Timer Input Rise
and Fall Time

3.0V 100 100 100 100 ns 1

5.5V 100 100 100 100 ns 1

8 TwIL Int. Request Input

Low Time

3.0V 100 100 100 100 ns 1,2

5.5V 70 70 70 70 ns 1,2

9 TwIH Int. Request Input

High Time

3.0V 5TpC 5TpC 5TpC 5TpC 1

5.5V 5TpC 5TpC 5TpC 5TpC 1,2

10 T wdt Watch-Dog Timer

Delay Time
Before Timeout

3.0V 25 25 25 25 ms

5.5V 12 12 10 10 ms

11 Tpor Power-On Reset

Time

3.0V 50 160 50 160 50 160 50 160 ms 3

5.5V 20 80 20 80 20 80 20 80 ms 3

3.0V 4 38 4 38 4 38 4 38 ms 4

5.5V 3 18 3 18 2 18 2 18 ms 4

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 (P33-P31).

3. Z86C08.

4. Z86C04

Z86C04/C08
CMOS 8-Bit Low-Cost 1K/2K-ROM Microcontrollers Zilog

15 P R E L I M I N A R Y DS97DZ80502

AC ELECTRICAL CHARACTERISTICS

Low Noise Mode (SCLK/TCLK = XTAL)

TA= –40°C to +125°C

1 MHz 4 MHz

No Symbol Parameter

V

CC

Min Max Min Max Units Notes

1 TpC Input Clock Period 3.0V 1000 DC 250 DC ns 1

5.5V 1000 DC 250 DC ns 1

2 TrC,TfC Clock Input Rise

and Fall Times

3.0V 25 25 ns 1

5.5V 25 25 ns 1

3 TwC Input Clock Width 3.0V 500 125 ns 1

5.5V 500 125 ns 1

4 TwTinL Timer Input Low Width 3.0V 100 100 ns 1

5.5V 70 70 ns 1

5 TwTinH Timer Input High Width 3.0V 2.5TpC 2.5TpC 1

5.5V 2.5TpC 2.5TpC 1

6 TpTin Timer Input Period 3.0V 4TpC 4TpC 1

5.5V 4TpC 4TpC 1

7 TrTin,

TtTin

Timer Input Rise
and Fall Time

3.0V 100 100 ns 1

5.5V 100 100 ns 1

8 TwIL Int. Request Input

Low Time

3.0V 100 100 ns 1,2

5.5V 70 70 ns 1,2

9 TwIH Int. Request Input

High Time

3.0V 2.5TpC 2.5TpC 1

5.5V 2.5TpC 2.5TpC 1,2

10 Twdt Watch-Dog Timer

Delay Time Before Timeout

3.0V 25 25 ms 3

5.5V 10 10 ms 3

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 (P33-P31).

3. Internal RC Oscillator driving WDT.

Z86C04/C08
CMOS 8-Bit Low-Cost 1K/2K-ROM Microcontrollers Zilog

16 P R E L I M I N A R Y DS97DZ80502

T

A

= 0°C to 70°CT

A

= –40°C to +105°C

1 MHz 4 MHz 1 MHz 4 MHz

No Symbol Parameter

V

CC

Min Max Min Max Min Max Min Max Units Notes

1 TpC Input Clock Period 3.0V 1000 DC 250 DC 1000 DC 250 DC ns 1

5.5V 1000 DC 250 DC 1000 DC 250 DC ns 1

2 TrC,TfC Clock Input Rise

and Fall Times

3.0V 25 25 25 25 ns 1

5.5V 25 25 25 25 ns 1

3 TwC Input Clock Width 3.0V 500 125 500 125 ns 1

5.5V 500 125 500 125 ns 1

4 TwTinL Timer Input Low Width 3.0V 100 100 100 100 ns 1

5.5V 70 70 70 70 ns 1

5 TwTinH Timer Input High Width 3.0V 2.5TpC 2.5TpC 2.5TpC 2.5TpC 1

5.5V 2.5TpC 2.5TpC 2.5TpC 2.5TpC 1

6 TpTin Timer Input Period 3.0V 4TpC 4TpC 4TpC 4TpC 1

5.5V 4TpC 4TpC 4TpC 4TpC 1

7 TrTin,

TtTin

Timer Input Rise
and Fall Timer

3.0V 100 100 100 100 ns 1

5.5V 100 100 100 100 ns 1

8 TwIL Int. Request Input

Low Time

3.0V 100 100 100 100 ns 1,2

5.5V 70 70 70 70 ns 1,2

9 TwIH Int. Request Input

High Time

3.0V 2.5TpC 2.5TpC 2.5TpC 2.5TpC 1

5.5V 2.5TpC 2.5TpC 2.5TpC 2.5TpC 1,2

10 Twdt Watch-Dog Timer

Delay Time Before
Timeout

3.0V 25 25 25 25 ms 3

5.5V 12 12 10 10 ms 3

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 (P33-P31).

3. Internal RC Oscillator driving WDT.

Z86C04/C08

Zilog CMOS 8-Bit Low-Cost 1K/2K-ROM Microcontrollers

DS97DZ80502 P R E L I M I N A R Y 17

1

LOW NOISE VERSION
Low EMI Emission

The Z8® can be programmed to operate in a Low EMI
emission mode by means of a mask ROM bit option. Use
of this feature results in:

■ All pre-driver slew rates reduced to 10 ns typical.

■ Internal SCLK/TCLK operation limited to a maximum of

4 MHz - 250 ns cycle time.

■ Output drivers have resistances of 200 ohms (typical).

■ Oscillator divide-by-two circuitry eliminated.

The Low EMI mode is mask-programmable to be selected
by the customer at the time the ROM code is submitted.a

APPLICATION PRECAUTIONS:

1. Emulator does not support the 32KHz operation.

2. For the Z86C04, the WDT only runs in Stop Mode if the
permanent WDT option is selected and if the on-board RC
oscillator is selected as the clock source for the WDT.

3. For the Z86C08, the WDT only runs in Stop Mode if the
permanent WDT option is selected.

4. The registers %FE (GPR) and %FF (SPL) are reset to
00Hex after Stop Mode recovery or any reset.

5. Emulator does not support the system clock driving the
WDT mask option.

Z86C04/C08
CMOS 8-Bit Low-Cost 1K/2K-ROM Microcontrollers Zilog

18 P R E L I M I N A R Y DS97DZ80502

PIN DESCRIPTION

XTAL1, XTAL2

Crystal In, Crystal Out

(time-based input
and output, respectively). These pins connect a RC, paral­lel-resonant crystal, LC, or an external single-phase clock
to the on-chip clock oscillator and buffer.

Auto Latch. The Auto Latch puts valid CMOS levels on all
CMOS inputs (except P33, P32, P31) that are not external­ly driven. After Power-On Reset, this level is 0 or 1 cannot
be determined. A valid CMOS level, rather than a floating

node, reduces excessive supply current flow in the input
buffer. To change the Auto Latch state, the auto latches
must be over driven with current greater than I

ALH

(high to

low) or I

ALL

(low to high).

Port 0 (P02-P00). Port 0 is a 3-bit I/O, bidirectional,
Schmitt-triggered CMOS compatible I/O port. These three
I/O lines can be configured under software control to be all
inputs or all outputs (Figure 7).

Figure 6. Port 0 Configuration

Open

Out

In

1.5 2.3 Hysteresis

PAD

Port 0 (I/O)

Z86E04

and

Z86E08

Auto Latch Option

R 500 kΩ

VCC @ 5.0V

Z86C04/C08
CMOS 8-Bit Low-Cost 1K/2K-ROM Microcontrollers Zilog

19 P R E L I M I N A R Y DS97DZ80502

Port 2 (P27-P20). Port 2 is an 8-bit I/O, bit programmable,

bi-directional, Schmitt-triggered CMOS compatible I/O
port. These eight I/O lines can be configured under soft-

ware control to be an input or output, independently. Bits
programmed as outputs may be globally programmed as
either push-pull or open-drain (Figure 8).

Figure 7. Port 2 Configuration

Port 2 (I/O)

MCU

Open

Out

In

PAD

Open Drain

Auto Latch

R 500 kΩ

1.5 2.3 Hysteresis Vcc @ 5.0V

Z86C04/C08
CMOS 8-Bit Low-Cost 1K/2K-ROM Microcontrollers Zilog

20 P R E L I M I N A R Y DS97DZ80502

PIN DESCRIPTION (Continued)

Port 3 (P33-P31). Port 3 is a 3-bit, Schmitt-triggered

CMOS compatible port with three fixed input (P33-P31)
lines. These three input lines can be configured under soft-

ware control as digital inputs or analog inputs. These three
input lines can also be used as the interrupt sources IRQ0­IRQ3 and as the timer input signal (TIN) (Figure 9).

Comparator Inputs. Two analog comparators are added to
Port 3 inputs for interface flexibility. Typical applications for
these on-board comparators are: Zero crossing detection,
A/D conversion, voltage scaling, and threshold detection.

The dual comparator (common inverting terminal) features
a single power supply which discontinues power in STOP
mode. The common voltage range is 0-4V when the V

CC

is

5.0V.

Interrupts are generated on either edge of Comparator 2’s
output, or on the falling edge of Comparator 1’s output.
The comparator output may be used for interrupt genera­tion, Port 3 data inputs, or TIN through P31. Alternately, the
comparators may be disabled, freeing the reference input
(P33) for use as IRQ1 and/or P33 input.

Figure 8. Port 3 Configuration

D1

R247 = P3M

P31 (AN1)

P32 (AN2)

1 = Analog
0 = Digital

P31
Data Latch
IRQ, Tin

DIG.

AN.

+

-

+

-

Port 3

MCU

IRQ3
P32
Data Latch
IRQ0

Vcc

P33
Data Latch
IRQ1

IRQ 0,1,2 = Falling Edge Detection
IRQ 3 = Rising Edge Detection

PAD

PAD

PAD

P33 (REF)

Z86C04/C08

Zilog CMOS 8-Bit Low-Cost 1K/2K-ROM Microcontrollers

DS97DZ80502 P R E L I M I N A R Y 21

1

FUNCTIONAL DESCRIPTION

RESET. Upon power-up the Power-On Reset circuit waits

for T

POR

ms, plus 18 clock cycles, and then starts program

execution at address%000C (Hex) (Figure 10). The device
control registers’ reset value is shown in Table 2.

Figure 9. Internal Reset Configuration

Table 1. Z86C04/C08 & C05/C07 Control Registers

Reset Condition

Addr. Reg. D7 D6 D5 D4 D3 D2 D1 D0 Comments

03H (3)* Port 3 U UUUU U U U
02H (2)* Port 2 U UUUU U U U
00H (0)* Port 0 U UUUU U U U
FFH(255) SPL 0 0000 0 0 0
FFH (254) GPR 0 0000 0 0 0
FDH (253) RP 0 0000 0 0 0
FCH (252) FLAGS U UUUU U U U
FBH (251) IMR 0 UUUU U U U
FAH (250) IRQ U U 0 0 0 0 0 0 IRQ3 is used

for positive

edge detection
F9H (249) IPR U UUUU U U U
F8H (248)* P01M U U U 0 U U 0 1
F7H (247)* P3M U UUUU U 0 0
F6H (246)* P2M 1 1111 1 1 1 Inputs after

reset
F5H (245) PRE0 U UUUU U U 0
F4H (244) T0 U UUUU U U U
F3H (243) PRE1 U UUUU U 0 0
F2H (242) T1 U UUUU U U U
F1H (241) TMR 0 0000 0 0 0

Note: *Registers are not reset after a STOP-Mode Recovery using P27 pin.
A subsequent reset will cause these control registers to be re-configured as shown in
Table 2 and the user must avoid bus contention on the port pins or it may affect device reliability.

POR

(Cold Start)

P27

(Stop Mode)

Delay Line

T

POR

ms

18 CLK

Reset Filter

Chip

Reset

XTAL OSC

INT OSC

Z86C04/C08
CMOS 8-Bit Low-Cost 1K/2K-ROM Microcontrollers Zilog

22 P R E L I M I N A R Y DS97DZ80502

FUNCTIONAL DESCRIPTION (Continued)

Program Memory. The Z86C04/C08 can address up to

1K/2K bytes of internal program memory (Figure 11). The
first 12 bytes of program memory are reserved for the in­terrupt vectors. These locations contain six 16-bit vectors
that correspond to the six available interrupts. Bytes 0­1023/2047 are on-chip mask-programmed ROM.

Register File. The Register File consists of three I/O port
registers, 125 general-purpose registers, and 14 control
and status registers (R0, R2-R3, R4-R127, and R241­R255, respectively; see Figure 12). Note that R254 is
available for general purpose use. The Z8 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 eight working register groups, each occupy­ing 16 continuous locations. The Register Pointer (Figure

13) addresses the starting location of the active working-

register group. Upon power-up, the general purpose regis­ters are undefined.

Figure 10. Program Memory Map

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)

IRQ5
IRQ4
IRQ4
IRQ3
IRQ3
IRQ2
IRQ2
IRQ1
IRQ1
IRQ0
IRQ0

IRQ5

1023/2047

3FH/7FFH

0CH
0BH

09H
08H
07H

06H
05H

04H
03H
02H
01H

00H

0AH

Figure 11. Register File

SPL

Stack Pointer (Bits 7-0)

Reserved

Register Pointer

Program Control Flags

Interrupt Mask Register

Interrupt Request Register

Interrupt Priority Register

Ports 0-1 Mode

Port 3 Mode
Port 2 Mode
To Prescaler

Timer/Counter0

T1 Prescaler

Timer/Counter1

Timer Mode

Not Implemented

General Purpose

Registers

Port 3
Port 2

Reserved

Port 0

RP

IMR
IRQ
IPR

P3M
P2M
PRE0
T0
PRE1
T1
TMR

P3
P2
P1
P0

P01M

Flags

IndentifiersLocation

255
254
253
252
251
250
249
248
247
246
245
244
243
242
241
240

4
3
2
1
0

128
127

Z86C04/C08

Zilog CMOS 8-Bit Low-Cost 1K/2K-ROM Microcontrollers

DS97DZ80502 P R E L I M I N A R Y 23

1

Stack Pointer. The Z8 has an 8-bit Stack Pointer (R255)

used for the internal stack that resides within the 124 gen­eral-purpose registers.

General-Purpose Register (GPR). The general-purpose
register upon device power-up is undefined. The general­purpose register upon a STOP-Mode Recovery and reset
stays in its last state. It may not keep its last state from a
VLV reset if the VCC drops below 2.6V. Note: Register R254
has been designated as a general-purpose register and is
set to 00H after any reset.

Counter/Timer. There are two 8-bit programmable
counter/timers (T0 and T1), each driven by its own 6-bit
programmable prescaler. The T1 prescaler can be driven
by internal or external clock sources, however the T0 can
be driven by the internal clock source only (Figure 14).

The 6-bit prescalers can divide the input frequency of the
clock source by any integer number from 1 to 64. Each
prescaler drives its counter, which decrements the value
(1 to 256) that has been loaded into the counter. When
both counter and prescaler reach the end of count, a timer
interrupt request, IRQ4 (T0) or IRQ5 (T1), is generated.

The counter can be programmed to start, stop, restart to
continue, or restart from the initial value. The counters 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 counters, but not the prescalers are read at any time
without disturbing their value or count mode. The clock
source for T1 is user-definable and can be either the inter­nal microprocessor clock divided by four, or an external
signal input through Port 3. The Timer Mode register con­figures the external timer input (P31) as an external clock,
a trigger input that is retriggerable or non-retriggerable, or
as a gate input for the internal clock.

Figure 12. Register Pointer

The upper nibble of the register file address
provided by the register pointer specifies
the active working-register group.

r7 r6 r5 r4 R253

(Register Pointer)

I/O Ports

Specified Working

Register Group

The lower nibble
of the register
file address
provided by the
instruction points
to the specified
register.

r3 r2 r1 r0

Register Group 1

Register Group 0

R15 to R0

Register Group F

R15 to R4*
R3 to R0

R15 to R0

FF

F0

0F

00

1F

10

2F

20

3F

30

4F

40

5F

50

6F

60

7F

70

*Expanded Register Group (0) is selected in this figure
by handling bits D3 to D0 as "0" in Register R253(RP).

Z86C04/C08
CMOS 8-Bit Low-Cost 1K/2K-ROM Microcontrollers Zilog

24 P R E L I M I N A R Y DS97DZ80502

Interrupts. The Z8 has six interrupts from six different

sources. These interrupts are maskable and prioritized
(Figure 15). The six sources are divided as follows: the fall­ing edge of P31 (AN1), P32 (AN2), P33 (REF), the rising
edge of P32 (AN2), and the two counter/timers. The Inter­rupt Mask Register globally or individually enables or dis­ables the six interrupt requests (Table 3).

When more than one interrupt is pending, priorities are re­solved by a programmable priority encoder that is con­trolled by the Interrupt Priority register. All Z8 interrupts are
vectored through locations in program memory. When an
Interrupt machine cycle is activated, an interrupt request is
granted. This disables all 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 starting 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 requests needs service.

Note: User must select any Z86C08 mode in Zilog’s C12
ICEBOX

™

emulator. The rising edge interrupt is not

supported on the Z86CCP00ZEM emulator.

Figure 13. Counter/Timers Block Diagram

OSC

PRE0

Initial Value

Register

T0

Initial Value

Register

T0

Current Value

Register

6-Bit

Down

Counter

8-Bit

Down

Counter

÷ 2

÷4

6-Bit

Down

Counter

8-Bit

Down

Counter

PRE1

Initial Value

Register

T1

Initial Value

Register

T1

Current Value

Register

Clock

Logic

IRQ4

IRQ5

Internal Data Bus

Write

Write

Read

Internal Clock
Gated Clock
Triggered Clock
External Trigger

T P31

Write Write Read

Internal Data Bus

Internal
Clock

÷4

IN

*

*

Note: Divide-by-two is not used in Low EMI Mode.

Z86C04/C08
CMOS 8-Bit Low-Cost 1K/2K-ROM Microcontrollers Zilog

25 P R E L I M I N A R Y DS97DZ80502

FUNCTIONAL DESCRIPTION (Continued)

Table 2. Interrupt Types, Sources, and Vectors

Name Source Vector Location Comments

IRQ0 AN2(P32) 0,1 External (F) Edge
IRQ1 REF(P33) 2,3 External (F) Edge
IRQ2 AN1(P31) 4,5 External (F) Edge
IRQ3 AN2(P32) 6,7 External (R) Edge
IRQ4 T0 8,9 Internal
IRQ5 T1 10,11 Internal

Notes:

F = Falling edge triggered
R = Rising edge triggered.

Figure 14. Interrupt Block Diagram

IRQ

IMR

IPR

PRIORITY

LOGIC

6

Global

Interrupt

Enable

Vector Select

Interrupt

Request

IRQ0 - IRQ5

Z86C04/C08
CMOS 8-Bit Low-Cost 1K/2K-ROM Microcontrollers Zilog

26 P R E L I M I N A R Y DS97DZ80502

Clock. The on-chip oscillator has a high-gain, parallel-res-

onant amplifier for connection to a RC, crystal, ceramic
resonator, LC, or any suitable external clock source
(XTAL1 = Input, XTAL2 = Output). The crystal should be
AT cut, 12 MHz max, with a series resistance (RS) less
than or equal to 100 Ohms.

The crystal should be connected across XTAL1 and
XTAL2 using the vendor’s crystal recommended capaci­tors (which depends on the crystal manufacturer, ceramic
resonator and PCB layout) from each pin directly to device
Ground pin 14 (Figure 16).

Note that the crystal capacitor loads should be connected
to V

SS

pin 14 to reduce ground noise injection.

To use 32 KHz crystal, the 32 KHz operational mask option
must be selected, and an external resistor R must be con­nected across XTAL1 and XTAL2.To use RC oscillator,
the RC oscillator option must be selected.

HALT Mode. This instruction turns off the internal CPU
clock but not the crystal oscillation. The counter/timers and
external interrupts IRQ0, IRQ1, IRQ2, and IRQ3 remain
active. The device can be recovered by interrupts, either
externally or internally generated. An interrupt request
must be executed (enabled) to exit HALT mode. After the
interrupt service routine, the program continues from the
instruction after the HALT.

STOP Mode. This instruction turns off the internal clock
and external crystal oscillation and reduces the standby
current. The STOP mode can be released by two methods.
The first method is a RESET of the device by removing
VCC or dropping the VCC below VLV. The second method
is if P27 is at a low level when the device executes the
STOP instruction. A low condition on P27 releases the
STOP mode regardless if configured for input or output.

Program execution under both conditions begins at loca­tion 000C (Hex). However, when P27 is used to release
the STOP mode, the I/O port mode registers are not re­configured to their default power-on conditions. This pre­vents any I/O, configured as output when the STOP in­struction was executed, from glitching to an unknown
state. To use the P27 release approach with STOP mode,
use the following instruction:

Note: (X = dependent upon user’s application.)

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, that is, as follows:

Watch-Dog Timer (WDT). The Watch-Dog Timer is en­abled by instruction WDT. When the WDT is enabled, it
cannot be stopped by the instruction. With the WDT in­struction, the WDT should be refreshed once the WDT is
enabled within every Twdt period; otherwise, the Z8 resets
itself. The WDT instruction affects the Flags accordingly: Z
= 1, S = 0, V = 0.

WDT = 5F (Hex)

LD P2M, #1XXX XXXXB

NOP

STOP

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

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

Figure 15. Oscillator Configuration

XTAL1

XTAL2

C1

C2

C1

C2

Ceramic
Resonator
or Crystal

External Clock

L

LC Clock

XTAL1

XTAL2

XTAL1

XTAL2

*

*

*

*

*

= Use pin 14.

XTAL1

XTAL2

C1

C2

R

32 KHz

32 KHz Crystal Clock

XTAL1

XTAL2

R

RC Clock

C

*

*

*

Z86C04/C08

Zilog CMOS 8-Bit Low-Cost 1K/2K-ROM Microcontrollers

DS97DZ80502 P R E L I M I N A R Y 27

1

Opcode WDT (5FH). The first time opcode 5FH is execut-

ed, the WDT is enabled, and subsequent execution clears
the WDT counter. This has to be done within the maximum
T

WDT

period; otherwise, the WDT times out and generates
a Reset. The generated Reset is the same as a Power-On
Reset of T

POR

plus 18 XTAL clock cycles. The WDT does
not work (run) in STOP mode. The WDT is disabled during
and after a Reset, until the WDT is enabled again.

Opcode WDH (4FH). When this instruction is executed it
will enable the WDT during HALT. If not, the WDT will stop
when entering HALT. This instruction does not clear the
counters, it facilitates running the WDT function during
HALT mode. A WDH instruction executed without execut­ing WDT (5FH) has no effect.

Permanent WDT Mask Option. Only when the
Permanent WDT Mask Option is selected, then the WDT
is hardwired to be enabled after reset. The WDT will
operate in Run mode, HALT mode, and STOP mode. The
Opcode 5FH is used to refresh or clear the WDT counter.
The WDH instruction (4FH) has no effect The WDT will not
run in Stop Mode if the system clock driving the WDT is
selected (Z86C04 only).

System Clock Driving WDT Mask Option (Z86C04 only)

When this option is selected, the Z8’s system clock drives
the WDT instead of the on-board RC oscillator driving the

WDT. The WDT time-out will be SCLK x 32,512.The WDT
will not run in Stop Mode.

Note: The internal clock frequency is one-half the external
clock frequency in standard mode.

The device will function normally at or above 3.0V under all
conditions. Below 3.0V, the device functions normally until
the Low Voltage Protection trip point (V

LV

) is reached. The
device is guaranteed to function normally at supply
voltages above the low voltage trip point for the
temperatures and operating frequencies in Cases 1 and 2.
The actual low voltage trip point is a function of
temperature and process parameters (Figure 17).

ROM Protect. ROM Protect fully protects the Z86C04/C08
ROM code from being read internally. When ROM Protect

is selected. ROM look-up tables can be used in this
mode.

Low V oltage Protection (V

LV

). Maximum (VLV) Conditions:

Case 1: TA= –40°C , +85°C , Internal Clock

Frequency equal or less than 6 MHz

Case 2: T

A

= –40°C , +105°C , Internal Clock

Frequency equal or less than 4 MHz

2 MHz (Typical)

Temp –40C° 0°C +25°C +70°C +105°C

V

LV

3.0 2.75 2.6 2.3 2.1

Figure 16. Typical Z86C04/C08 VLV vs. Temperature

V

CC

(Volts)

3.2

2.8

2.6

2.4

2.2

2.0

-60 -40 -20 0 20 40 60 80 100 120 140

3.0

Temperature (°C)

VLV (Typical)

Z86C04/C08
CMOS 8-Bit Low-Cost 1K/2K-ROM Microcontrollers Zilog

28 P R E L I M I N A R Y DS97DZ80502

Z8® CONTROL REGISTER DIAGRAMS

Figure 17. Timer Mode Register (F1H: Read/Write)

Figure 18. Counter Time 1 Register (F2H: Read/Write)

Figure 19. Prescaler 1 Register (F3H: Write Only)

D7 D6 D5 D4 D3 D2 D1 D0

0 Disable T Count
1 Enable T Count

0 No Function
1 Load T

0

0
0

0 No Function
1 Load T

1

0 Disable T Count
1 Enable T Count

1
1

T Modes
00 External Clock Input
01 Gate Input
10 Trigger Input
(Non-retriggerable)
11 Trigger Input
(Retriggerable)

IN

R241 TMR

Reserved (Must be 0.)

D7 D6 D5 D4 D3 D2 D1 D0

T Initial Value
(When Written)
(Range 1-256 Decimal
01-00 HEX)
T Current Value
(When READ)

1

1

R242 T1

D7 D6 D5 D4 D3 D2 D1 D0

Count Mode
0 T Single Pass
1 T Modulo

1
1

Clock Source
1 T Internal
0 T External Timing Input
(T ) Mode

IN

1
1

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

R243 PRE1

Figure 20. Counter/Timer 0 Register (F4H: Read/Write)

Figure 21. Prescaler 0 Register (F5H: Write Only)

Figure 22. Port 2 Mode Register (F6H: Write Only)

Figure 23. Port 3 Mode Register (F7

H

: Write Only)

D7 D6 D5 D4 D3 D2 D1 D0

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

0

0

R244 T0

D7 D6 D5 D4 D3 D2 D1 D0

Count Mode

0 T0 Single Pass
1 T

0

Modulo-n

Reserved (Must be 0.)

Prescaler Modulo
(Range: 1-64 Decimal
01-00 Hex)

R245 PRE0

D7 D6 D5 D4 D3 D2 D1 D0

P2 - P2 I/O Definition
0 Defines Bit as OUTPUT
1 Defines Bit as INPUT

70

R246 P2M

D7 D6 D5 D4 D3 D2 D1 D0

0 Port 2 Open-Drain
1 Port 2 Push-Pull Active

Port 3 Inputs
0 Digital
1 Analog

Reserved (Must be 0.)

R247 P3M

Z86C04/C08

Zilog CMOS 8-Bit Low-Cost 1K/2K-ROM Microcontrollers

DS97DZ80502 P R E L I M I N A R Y 29

1

Figure 24. Port 0 and 1 Mode Register

(F8H: Write Only)

Figure 25. Interrupt Priority Register (F9

H

: Write Only)

Figure 26. Interrupt Request Register (FA

H

:

Read/Write)

D7 D6 D5 D4 D3 D2 D1 D0

P0 - P0 Mode
00 = Output
01 = Input

Reserved (Must be 0.)

Must be 1.

R248 P01M

03

D7 D6 D5 D4 D3 D2 D1 D0

Interrupt Group Priority

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

IRQ3, IRQ5 Priority (Group A)

0 IRQ5 > IRQ3
1 IRQ3 > IRQ5

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

D7 D6 D5 D4 D3 D2 D1 D0

IRQ0 = P32 Input ↓
IRQ1 = P33 Input ↓
IRQ2 = P31 Input ↓
IRQ3 = P32 Input ↑
IRQ4 = T0
IRQ5 = T1

Reserved (Must be 0.)

R250 IRQ

Figure 27. Interrupt Mask Register (FBH: Read/Write)

Figure 28. Flag Register (FCH: Read/Write)

Figure 29. Register Pointer (FD

H

: Read/Write)

Figure 30. Stack Pointer (FFH: Read/Write)

D7 D6 D5 D4 D3 D2 D1 D0

Reserved (Must be 0.)

1 Enables IRQ5-IRQ0
(D = IRQ0)

1 Enables Interrupts

0

R251 IMR

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

Reserved (Must be 0.)
Register Pointer

R253 RP

D7 D6 D5 D4 D3 D2 D1 D0

Stack Pointer Lower
Byte (SP - SP )

7 0

R255 SPL

Z86C04/C08
CMOS 8-Bit Low-Cost 1K/2K-ROM Microcontrollers Zilog

30 P R E L I M I N A R Y DS97DZ80502

DEVICE CHARACTERISTICS

Standard Mode

Figure 31. VIL, VOL vs. Temperature

1.0
.5

1.5

2.0

2.5

3.0

3.5

4.0

4.5

5.0

5.5

6.0

-20 0 406080

5.5V

3.0V

5.5V

3.0V

Vcc (Volt)

V
V

Temp

(C )

100-60 -40 20 120

OL
IL

Z86C04/C08

Zilog CMOS 8-Bit Low-Cost 1K/2K-ROM Microcontrollers

DS97DZ80502 P R E L I M I N A R Y 31

1

Standard Mode

Figure 32. VIH, VOH vs. Temperature

1.0

1.5

2.0

2.5

3.0

3.5

4.0

4.5

5.0

5.5

6.0

-20 0 40 60 80

5.5V

3.0V

3.0V

Vcc (Volt)

V Vs Temp
V Vs Temp

100

-60

-40 20 120

5.5V

OH

IH

Temp

C

Figure 33. Typical IOH vs. V

OH

-7.0

-8.0

-6.0

-5.0

-4.0

-3.0

0

-2.0

I

(mA)

OH

2.0 3.0 4.0 5.0 6.0 V

(Volt

)

OH

3.0V

5.5V

125

25

-40 C

125 25

-40 C

Z86C04/C08
CMOS 8-Bit Low-Cost 1K/2K-ROM Microcontrollers Zilog

32 P R E L I M I N A R Y DS97DZ80502

Figure 34. Typical WDT Time Out Period vs. V

CC

Over Temperature

-40°C

10

20

30

40

2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0
Voltage

+25°C

+105

°

C

Time

(ms)

0

Z86C04/C08

Zilog CMOS 8-Bit Low-Cost 1K/2K-ROM Microcontrollers

DS97DZ80502 P R E L I M I N A R Y 33

1

PACKAGE INFORMATION

Figure 35. 18-Pin DIP Package Diagram

Figure 36. 18-Pin SOIC Package Diagram

Z86C04/C08
CMOS 8-Bit Low-Cost 1K/2K-ROM Microcontrollers Zilog

34 P R E L I M I N A R Y DS97DZ80502

ORDERING INFORMATION

For fast results, contact your local Zilog sale offices for assistance in ordering the part(s) desired.

CODES
Preferred Package

P = DIP
S = SOIC

Preferred Temperature

S = 0°C to +70°C

Longer Lead Time

E = –40°C to +105°C
A = -40°C to +125°C

Speeds
12 = 12 MHz

Environmental

C = Plastic Standard

Z86C04
(12 MHz)

Standard Temperature

Z86C08
(12 MHz)

Standard Temperature

18-Pin DIP 18-Pin SOIC 18-Pin DIP 18-Pin SOIC

Z86C0412PSC Z86C0412SSC Z86C0812PSC Z86C0812SSC
Extended Temperature Extended Temperature

18-Pin DIP 18-Pin SOIC 18-Pin DIP 18-Pin SOIC

Z86C0412PEC
Z86C0412PAC

Z86C0412SEC
Z86C0412SAC

Z86C0812PEC
Z86C0812PAC

Z86C0812SEC
Z86C0812SAC

Example:

Z 86C04 12 P S C

Environmental Flow
Temperature
Package
Speed
Product Number
Zilog Prefix

is a Z86C04, 12 MHz, DIP, 0°C to +70°C, Plastic Standard Flow