SILICON GATE MOS 8102-2

A.C. CHARACTERISTICS TA =ooe to 70oe, Vee =5V ±5% unless otherwise specified

 

 

 

 

 

 

 

--·---

LIMITS

 

 

 

SYMBOL

 

PARAMETER

 

 

 

r----

 

mT----

UNIT

READ CYCLE

 

 

 

 

 

_.~~_~..._...

l}YP._

...

..L _~?<~. _._

 

 

 

 

 

 

 

85o-·-···T

-._-"--r .-_._.- --"---'-

 

--tR-e------r-R--EA~D-C-Y--C-L-E--·-------_ ..---------

 

ns

~~~~~~~---

~--------

~-_ .._-----

~--~--

-_._ ~._------

 

~ ---

--~

 

 

 

 

-----~_. -_.-

-.---~-.- -----

-_.--.--.~-------.-----.--. ...

- - _..---- ---1------- ----t···--- _._.-

 

t A

ACCESS TIME

 

 

 

 

 

I

500

i

850

 

ns

teo

CHIP ENABLE TO OUTPUT TIME

 

 

.

 

:

 

 

I

500

 

ns

 

~ ------

_ ---

 

 

 

---+

 

 

.._--l-.

 

~ ---

t OH1

PREVIOUS READ DATA VALID WITH RESPECT

 

 

50

I

 

 

 

 

 

os

 

TO ADDRESS

 

 

 

 

 

:

 

 

 

 

 

 

---------- 4 ---------

 

 

 

 

------ ·l - _.-_..-- .. ---- ---~----.

 

 

 

PREVIOUS READ DATA VALID WITH RESPECT

 

 

a

I

 

 

1

 

 

ns

 

TO CHIP ENABLE

 

 

 

 

 

i

 

 

_____:"__

 

-- J -

_

WRITE CYCLE

 

 

 

 

 

 

 

 

 

 

 

 

 

--~-C----

~W-R-I-T-E-C-Y-C-L-E----------------

 

T--8-~-r--~-~-

!

M

------ . ---- + ---- . ----- ...--.-.-----

.... -- . -------------------..

--

. __ ....

__ 1_ --

 

-

+ .

-..-.-t-------

tAW

ADDRESS TO WRITE SETUP TIME

 

 

I

200'

 

 

:

 

!

ns

 

 

 

. ----- ------ +i..--.----+-.-.-----.--..---~---.-----~---

~_tw_p

+_ -R-IT-E-P-U-L-S- -W-IDTH

 

 

 

I~~

L_.

 

 

.+- ...-n_--li---ns_-

tWR

WRITE RECOVERY TIME

 

 

--t

50:

 

 

!

 

I

ns

-----------

1t-------------------------

 

+------

~~:-------

 

 

..~

 

i

 

::_:

-+--~_:_~_:_:_~_T_L~_~~EEt~~~P-.±--

=~=~L~==--

+---

~-:-

t cw

CHIP ENABLE TO WRITE SETUP TIME

 

 

I

750!

 

 

;

 

 

ns

(1)Typical values are for T A=250 C and nominal supply voltage.

 

 

 

CAPACITANCE TA = 25°C, f = 1MHz

 

 

 

 

 

 

 

._------_._-----

LIMITS (pF)

A. C. CONDITIONS OF TEST

 

SYMBOL

TEST

 

 

 

TYP.

MAX.

Input Pulse Levels:

+0.65 Volt to 2.2 Volt

 

 

---------_.- - _.--.._---- --

 

 

 

 

Input Pulse Rise and Fall Times:

20nsec

CIN

INPUT CAPACITANCE

3

5

 

 

 

 

 

(ALL INPUT PINS) ViN :: OV

Timing Measurement Reference Level:

1.5 Volt

COUT

 

 

Output Load:

1 TTL Gate and CL

= 100 pF

OUTPUT CAPACITANCE

7

10

 

 

VOUT = OV

 

 

 

 

 

 

 

WAVEFORMS

 

 

 

 

 

 

 

READ CYCLE

 

 

WRITE CYCLE

 

 

t4-------tRC-----~

 

t4-------twc---------I~

 

ADDRESS

 

 

 

 

 

 

 

 

teo

 

 

 

 

 

 

CHIP

 

 

CHIP

 

..-----tew~----~I

 

 

 

 

 

 

 

ENABLE

 

 

ENABLE

 

 

 

~----tA-----""

 

 

 

~~----twP------...I

 

 

 

 

 

 

 

DATA

 

 

READ/

 

 

 

 

OUT

 

 

 

 

 

 

 

 

WRITE

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

~----tow----~~

 

 

 

 

DATA

DATA CAN

DATA STABLE

 

 

 

 

 

IN

CHANGE

 

 

 

 

 

 

 

 

5-77

Page 142 Page 144
Page 143
Image 143
Intel 8080 manual 85o-·-···T, +--~~~TL~~~EEt~~~P-.±, Capacitance T a = 25C, f = 1MHz, Conditions of Test
Page 142 Page 144

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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