SILICON GATE MOS 8702A

PROGRAMMING OPERATION

D.C. AND OPERATING CHARACTERISTICS FOR PROGRAMMING OPERATION

TA = 25°C, Vee = OV, Vss = +12V ± 10%, CS = OV unless otherwise noted

SYMBOL

 

 

TEST

MIN.

TYP.

MAX.

UNIT

CONDITIONS

ILl1 P

Address and Data Input

 

 

10

rnA

VIN = -48V

 

Load Current

 

 

 

 

 

'LI2P

Program and VG G

 

 

10

rnA

VIN = -48V

 

Load Current

 

 

 

 

 

'ss

Vss Supply Load Current

 

.05

 

rnA

Voo = Vpro,7 -48V

IOOp(l)

00

Supply

 

200

 

mA

Peak 1

 

 

 

 

 

 

Load Current

 

 

 

 

VGG = -35

VIHP

Input High Voltage

 

 

0.3

V

 

VIL1P

Pulsed Data Input

-46

 

-48

V

 

 

Low Voltage

 

 

 

 

 

V1L2P

Address Input Low

-40

 

-48

V

 

 

Voltage

 

 

 

 

 

VIL3P

Pulsed Input Low Voo

-46

 

-48

V

 

 

and Program Voltage

 

 

 

 

 

VIL4P

Pulsed

Input Low

-35

 

-40

V

 

 

VGG

 

Voltage

 

 

 

 

 

Note 1: lOOp flows only during VOO, VGG on time. lOOp should not be allowed to exceed 300mA for greater than 100~sec. Average power supply current lOOp is typically 40 mA at 20% duty cycle.

A.C. CHARACTERISTICS FOR PROGRAMMING OPERATION

TAMSIENT = 25°C, Vee = OV, Vss = + 12V ± 10%, CS = OV unless otherwise noted

SYMBOLTESTMIN. TYP. MAX. UNIT CONDITIONS

 

Duty Cycle (Voo , VGG )

 

20

%

 

 

t~pw

Program Pulse Width

 

3

ms

VGG = -35V, Voo =

 

 

 

 

 

 

V

=-48V

 

 

 

 

 

 

prog

 

tow

Data Set Up Time

25

 

IlS

 

 

tOH

Data Hold Time

10

 

IlS

 

 

tvw

Voo , VGG

Set Up

100

 

IlS

 

 

tvo

Voo , VGG

Hold

10

100

J.1S

 

 

tACW (2)

Address Complement

25

 

IlS

 

 

 

Set Up

 

 

 

 

 

 

tACH (2)

Address Complement

25

 

J.1S

 

 

 

Hold

 

 

 

 

 

 

tATW

Address True Set Up

10

 

J.1S

 

 

tATH

Address True Hold

10

 

J.1S

 

 

Note 2. All 8 address bits must be in the complement state when pulsed Vee and VGG move to their negative levels. The addresses (0 through

255)must be programmed as shown in the timing diagram for a minimum of 32 times.

5-41

Page 104 Page 106
Page 105
Image 105
Intel 8080 manual Operating Characteristics for Programming Operation, Symbol Test, TYP MAX Unit Conditions
Page 104 Page 106

8080 specifications

The Intel 8085 and 8080 microprocessors were groundbreaking innovations in the world of computing, paving the way for future microprocessor development and personal computing.

The Intel 8080, introduced in 1974, was an 8-bit microprocessor that played a fundamental role in the early days of personal computing. With a 16-bit address bus, it had the capability to address 64 KB of memory. Running at clock speeds of 2 MHz, the 8080 was notable for its instruction set, which included 78 instructions and 246 opcodes. It supported a range of addressing modes including direct, indirect, and register addressing. The 8080 was compatible with a variety of peripherals and played a crucial role in the development of many early computers.

The microprocessor's architecture was based on a simple and efficient design, making it accessible for hobbyists and engineers alike. It included an 8-bit accumulator, which allowed for data manipulation and storage during processing. Additionally, the 8080 featured registers like the program counter and stack pointer, which facilitated program flow control and data management. Its ability to handle interrupts also made it suitable for multitasking applications.

The Intel 8085, introduced in 1976, was an enhancement of the 8080 microprocessor. It maintained a similar architecture but included several key improvements. Notably, the 8085 had a built-in clock oscillator, simplifying system design by eliminating the need for external clock circuitry. It also featured a 5-bit control signal for status line management, which allowed for more flexible interfacing with peripheral devices. The 8085 was capable of running at speeds of up to 3 MHz and had an extended instruction set with 74 instructions.

One of the standout features of the 8085 was its support for 5 extra instructions for stack manipulation and I/O operations, which optimized the programming process. Additionally, it supported serial communication, making it suitable for interfacing with external devices. Its 16-bit address bus retained the 64 KB memory addressing capability of its predecessor.

Both the 8080 and 8085 microprocessors laid the groundwork for more advanced microprocessors in the years that followed. They demonstrated the potential of integrated circuits in computing and influenced the design and architecture of subsequent Intel microprocessors. Their legacy endures in the way they revolutionized computing, making technology accessible to a broader audience, and their influence is still felt in the design and architecture of modern microprocessors today.
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