CDP1851CE datasheet(3/14 Pages) INTERSIL

No de pièce	CDP1851CE

Description	CMOS Programmable I/O Interface

Download	14 Pages

Scroll/Zoom	100%

Fabricant	INTERSIL [Intersil Corporation]

Site Internet	http://www.intersil.com/cda/home

Logo

3 / 14 page

4-7

Functional Description

The CDP1851 has four modes of operation: input, output,

bidirectional, and bit-programmable. Port A is programmable

in all modes; port B is programmable in all but the

bidirectional mode. A control byte must be loaded into the

control register to program the ports. In the input and output

modes, each port has two handshaking signals, STROBE

and RDY. In the bidirectional mode, port A has four

handshaking signals: A RDY and A STROBE for input, B

RDY and B STROBE for output. If port A is programmed in

the bidirectional mode, port B must be programmed in the

bit-programmable mode. Each terminal of port A or B may

be individually programmed for input or output in the bit-

programmable mode. Since handshaking is not used in this

mode, the RDY and STROBE lines may also be used for bit-

programming if port A is not in the bidirectional mode.

Input Mode

When a peripheral device has data to input, it sends a

STROBE pulse to the PlO. The leading edge of this pulse

clears the RDY line, inhibiting further transmission from the

peripheral. The trailing edge of the STROBE pulse latches the

data into the PlO buffer register and also activates the INT line

to signal the CPU to read this data. The lNT pin can be wired

to the INT pin of the CPU or the EF lines for polling. The CPU

Static Electrical Speciﬁcations At TA = -40oC to +85oC, VDD 5%, Unless Otherwise Speciﬁed

PARAMETER

CONDITIONS

LIMITS

UNITS

VO

(V)

VIN

(V)

VDD

(V)

CDP1851

CDP1851C

MIN

(NOTE1)

TYP

MAX

MIN

(NOTE1)

TYP

MAX

Quiescent Device Current

IDD

-

0, 5

5

-

0.01

50

-

0.02

200

µA

-

0, 10

10

-

1

200

-

µA

Output Low Drive

(Sink) Current

IOL

0.4

0, 5

5

1.6

3.2

-

1.6

3.2

-

mA

0.5

0, 10

10

2.6

5.2

-

mA

Output High Drive

(Source) Current

IOH

4.6

0, 5

5

-1.15

-2.3

-

-1.15

-2.3

-

mA

9.5

0, 10

10

-2.6

-5.2

-

mA

Output Voltage Low-Level

(Note 2)

VOL

-

0, 5

5

-

0

0.1

-

0

0.1

V

-

0, 10

10

-

0

0.1

-

V

Output Voltage High Level

(Note 2)

VOH

-

0, 5

5

4.9

5

-

4.9

5

-

V

-

0, 10

10

9.9

10

-

V

Input Low Voltage

VIL

0.5,

4.5

-

5

-

1.5

-

1.5

V

0.5,

9.5

-

10

-

3

---

V

Input High Voltage

VlH

0.5,

4.5

-

5

3.5

-

3.5

-

V

0.5,

9.5

-

10

7

--

---

V

Input Leakage Current

IlN

Any

Input

0, 5

5

-

±1-

-

±1

µA

0, 10

10

-

±2

---

µA

Three-State Output Leakage

Current

IOUT

0, 5

5

-

±1-

-

±1

µA

0, 10

10

-

±1

---

µA

Operating Current (Note 3)

IDD1

-

0, 5

5

-

1.5

3

-

1.5

3

mA

-

0, 10

10

-

6

12

-

mA

Input Capacitance

CIN

-

5

7.5

-

5

7.5

pF

Output Capacitance

COUT

-

10

15

-

10

15

pF

NOTES:

1. Typical values are for TA = 25

oC and nominal V

DD.

2. IOL = IOH = 1µA

3. Operating current is measured at 200kHz for VDD = 5V and 400kHz for VDD = 10V, with open output (worst-case frequencies for

CDP1802A system operating at maximum speed of 3.2MHz).

CDP1851, CDP1851C

Numéro de pièce similaire - CDP1851CE

Fabricant	No de pièce	Fiches technique	Description
Intersil Corporation	CDP1852	153Kb / 9P	Byte-Wide Input/Output Port March 1997
	CDP1852/3	218Kb / 7P	High-Reliability Byte-Wide Input/Output Port
	CDP18523	218Kb / 7P	High-Reliability Byte-Wide Input/Output Port
	CDP1852C	153Kb / 9P	Byte-Wide Input/Output Port March 1997
	CDP1852C/3	218Kb / 7P	High-Reliability Byte-Wide Input/Output Port

More results

Description similaire - CDP1851CE

Fabricant	No de pièce	Fiches technique	Description
IC-Haus GmbH	IC-GD	1,023Kb / 55P	UNIVERSAL I/O INTERFACE
Toshiba Semiconductor	TLP181GB-TPLFT	209Kb / 9P	Office Machine Programmable Controllers AC Adapter I/O Interface Board
	TLP181F	209Kb / 9P	Office Machine Programmable Controllers AC Adapter I/O Interface Board
	TLP181T	209Kb / 9P	Office Machine Programmable Controllers AC Adapter I/O Interface Board
	TLP185GB-TPLEO	239Kb / 11P	Office Machine Programmable Controllers AC Adapter I/O Interface Board
	TLP-181	217Kb / 9P	Office Machine Programmable Controllers AC Adapter I/O Interface Board
SPANSION	S25FL128SAGMFI001	5Mb / 153P	CMOS 3.0 Volt Core with Versatile I/O Serial Peripheral Interface with Multi-I/O
Toshiba Semiconductor	TMP82C255A	682Kb / 32P	CMOS PROGRAMMABLE PERIPHERAL INTERFACE
Toshiba Semiconductor	TMP82C265BF	1Mb / 31P	CMOS PROGRAMMABLE PERIHERAL INTERFACE
Intersil Corporation	CS82C55AZ96	560Kb / 29P	CMOS Programmable Peripheral Interface

More results

CDP1851CE Fiches technique(PDF) 3 Page - Intersil Corporation

CDP1851CE Fiches technique(HTML) 3 Page - Intersil Corporation

Numéro de pièce similaire - CDP1851CE

Description similaire - CDP1851CE

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14

Fiches technique Télécharger

Lien URL