ZiLOG Z86319 PROCUREMENT SPECIFICATION

Z86319

PRELIMINARY PRODUCT SPECIFICATION

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Z86319	1
PS/2 MOUSE CONTROLLER

FEATURES

	ROM	RAM*	I/O	Voltage
Device	(KB)	(Bytes)	Lines	Range
Z86319	2	125	13	4.5V to 5.5V

Note: *General-Purpose (144K Total RAM)

■0°C to + 40°C Operating Temperature Range

■Low-Power Consumption: 25 mW (Typical)

■P24-P27 Can Be Configured with a Voltage Divider During Input Mode

■On-Chip Oscillator (Tolerance = ±10%)

■Fast Instruction Pointer: 1.5 s @ 4 MHz

■ESD Protection Circuitry

■Hardwired Watch-Dog Timer (WDT)

■Excellent System Level EMI/EFT/ESD

GENERAL DESCRIPTION

The Z86319 is a member of the Z8 family of CMOS microcontrollers architecture to be used in mouse applications. These devices offer on-board pull-up and pull-down resistors, a trip-point buffer to accommodate opto-transistor outputs, and high drive ports capable of up to 10 mA current sinking per pin (3 pins maximum).

A permanently enabled Watch-Dog Timer ensures operational reliability across a broad range of mouse application environments. The precision RC oscillator filters out highfrequency noise from the oscillator input pin. When configured as inputs, P24-P27 have built in voltage dividers (25K pull-up /7.5K pull-down). The input levels are designed for connection to the emitters of the opto-transistors and switch at a voltage level of 0.4 VDD.

For applications requiring powerful I/O capabilities, the Z86319 provides dedicated input and output lines that are grouped into three ports. There are two basic address spaces available to support this configuration: Program Memory, and 125 bytes of general-purpose registers.

The Z86319 device provides two on-chip 8-bit programmable counter/timers with a large number of user-selectable modes. Each counter/timer is driven by its own 6-bit programmable prescaler. The Z86319 counter/timers off-load system real-time tasks such as counting/timing and input/output data communications for increased system efficiency.

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Z86319
PS/2 Mouse Controller	Zilog

GENERAL DESCRIPTION (Continued)

Input

Port 3

Counter/

Timers (2)

Interrupt

Control

Port 2

I/O

(Bit Programmable)

VDD

GND AGND

RCIN

Machine

Timing & Inst.

Control

ALU

FLAG

Prg. Memory

2048 x 8-Bit

Register

Pointer

Program

Register File

Counter

144 x 8-Bit

Port 0	WDT

I/O

Figure 1. Z86319 Functional Block Diagram

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	Z86319
Zilog	PS/2 Mouse Controller

PIN DESCRIPTIONS

P24		1	18			P23
P25						P22
P26						P21
P27						P20
			18 - Pin
VDD			DIP/SOIC			GND
RCIN						P02
AGND						P01
P31		9	10			P00
GND						P33

Figure 2. 18-Pin DIP/SOIC Pin Configuration

Table 1. 18-Pin DIP/SOIC Pin Identification

Pin #	Symbol	Function	Direction
1-4	P24-P27	Port 2, Pins 4,5,6,7	In/Output
5	VDD	Power Supply	Power
6	RCIN	RC Oscillator	Input
7	AGND	Analog Ground	Ground
8	P31	Port 3, Pin 1	Input
9	GND	Ground	Input
10	P33	Port 3, Pin 3,	Input
11-13	P00-P02	Port 0, Pins 0,1,2	In/Output
14	GND	Ground	Ground
15-18	P20-P23	Port 2, Pins 0,1,2,3	In/Output

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Z86319
PS/2 Mouse Controller	Zilog

PIN FUNCTIONS

RCIN. A precision 1% resistor is connected to RCIN, generating oscillation with an internal capacitor.

Resistor values and corresponding typical frequencies are shown in Table 2 and graph chart (Figure 3).

Table 2. Resistor Values and Corresponding

Typical Frequencies

External Resistor	Average Frequency
14.0K	5.01 MHz
15.0K	4.70 MHz
16.0K	4.43 MHz
17.0K	4.19 MHz
18.0K	3.97 MHz
19.0K	3.78 MHz
20.0K	3.60 MHz
21.0K	3.44 MHz
22.0K	3.30 MHz
23.0K	3.16 MHz

FREQUENCY (MHz)

6

5

4

3

2

1

0

1 4

1 5

1 6

1 7

1 8

1 9

2 0

2 1

2 2

2 3

RESISTOR VALUE (K OHMS)

Figure 3. Z86319 RC Frequency in Function of the External Resistance (typical numbers)

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	Z86319
Zilog	PS/2 Mouse Controller

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).

From Output

Under Test

I

150 pF

Figure 4. Test Load Diagram

ABSOLUTE MAXIMUM RATINGS

Sym	Parameter	Min	Max	Units
VDD	Supply Voltage*	–0.3	+7	V
TSTG	Storage Temp	–65°	+150°	C
TA	Oper Ambient	0°	40°	C
	Temp

Notes:

*Voltages on all pins with respect to Ground.

Stresses greater than those listed under Absolute Maximum Ratings may cause permanent damage to the device. This rating 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.

CAPACITANCE

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

Parameter	Min	Max
Input Capacitance	0	10 pF
Output Capacitance	0	20 pF
I/O Capacitance	0	25 pF

VCC SPECIFICATION

VCC = 4.5V to 5.5V

Using the precision RC oscillator feature, f = 4.0 MHz ±10% under the following conditions:

■VCC = 5.0V ±10%

■Temp 0 to 40°C

■Application board capacitance:

–2.0 pF max.

–0.5 pF min.

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Z86319
PS/2 Mouse Controller	Zilog

DC ELECTRICAL CHARACTERISTICS

4.5V ≥ VDD ≤ 5.5V

		TA = 0°C to +40°C
Sym	Parameter	Min	Max	Units	Conditions
VIH	Rising Input	2.3	3.2	V	Note 1
	Schmitt-Triggered
VIL	Falling Input	1.3	2.2	V	Note 1
	Schmitt-Triggered
VIL	Input Low Voltage CMOS Input			V
VOH	Output High Voltage	VDD – 0.4		V IOH = –2.0 mA;
					VDD=4.5V
VOL1	Output Low Voltage		0.4	V	IOL = +4.0 mA;
					VDD=5.5V
VOL2	Output Low Voltage		0.8	V	IOL = 10.0 mA,
					3 Pin Max; VDD=5.5V
VLV	VCC Low Voltage Protection	2.25	2.95	V	@ 4 MHz Max, Note 2
VTP	Trip Point Voltage	1.9	2.5	V	P24-P27; VDD=5.5V
	(P24-P27)
		1.5	2.1	V	VDD=4.5V
IIL	Input Leakage	–1.0	1.0	A	VIN = 0V, or VCC
					Note 4
IOL	Output Leakage	–1.0	1.0	A	VIN = 0V, or VCC
					Note 4
IDD	Supply Current		4.5	mA	@ 4 MHz, Note 3;
					VDD=5.5V
IDD1	Standby Current		2.2	mA	@ 4 MHz, Note 3;
					VDD=5.5V
IPU	Pull-Up Current (100K)	–20		A	VIH @ 1V
	P00-02, P31, P33		–95	A	VIH @ 1V
IPD	Pull-Down Current (100K)	+20		A	VIL @ 3V
	P00-02, P31, P33		+85	A	VIL @ 4V
IPU	Pull-Up Current (10K)	–370		A	VIL = 0V
	P20, P22		–670	A	VIL = 0V

Notes:

1.The min. and max. values of the Schmitt-Trigger input voltages track each other over temperature, VDD, and process variations.

2.The device is functional from VDD down to VLV voltage. The minimum operational VDD is determined by the value of the VLV voltage at ambient temperature. The VLV voltage increases as the temperature decreases.

3.All input pins are tied to GND and all output pins are floating.

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	Z86319
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AC ELECTRICAL CHARACTERISTICS

Timing Diagrams

1

1

TIN

2

3

4

IRQ N

5

6

Figure 5. Electrical Timing Diagram

				TA = 0°C to +40°C
No	Symbol	Parameter	VDD	Min	Max	Units	Notes
1	TrTin, TtTin	Timer Input Rise and Fall Time	5.5V		100	ns	1
2	TwTinL	Timer Input Low Width	5.5V	70		ns	1
3	TwTinH	Timer Input High Width	5.5V	2.5TpC			1
4	TpTin	Timer Input Period	5.5V	4TpC			1
5	TwIL	Int. Request Input Low Time	5.5V	70		ns	1,2
6	TwIH	Int. Request Input High Time	5.5V	2.5TpC			1,2
	Twdt	Watch-Dog Timer Time Out	5.5V	10		ms
	TPOR	Power-On Reset Time	5.5V	2	10	ms
	TpC	RC Oscillator Clock Period	5.5V	220	5000	ns

Notes:

1.Timing Reference uses 0.9 VDD for a logic 1 and 0.1 VDD for a logic 0.

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

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