NAT9914BPD datasheet, PDF - EEWORLD Datasheet

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NAT9914BPD: DescriptionIEEE 488 (GPIB) BUS CONTROLLER, PQCC44; Categorysemiconductor The embedded processor and controller; File Size229KB，10 Pages; ManufacturerETC

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NAT9914BPD Overview

IEEE 488 (GPIB) BUS CONTROLLER, PQCC44

NAT9914BPD Parametric

Parameter Name	Attribute value
Number of functions	1
Number of terminals	44
Maximum operating temperature	70 Cel
Minimum operating temperature	0.0 Cel
Maximum supply/operating voltage	5.25 V
Minimum supply/operating voltage	4.75 V
Rated supply voltage	5 V
External data bus width	8
Processing package description	Plastic, LCC-44
state	CONSULT MFR
Craftsmanship	CMOS
packaging shape	SQUARE
Package Size	ChipCARRIER
surface mount	Yes
Terminal form	J BEND
Terminal spacing	1.27 mm
Terminal location	Four
Packaging Materials	Plastic/Epoxy
Temperature level	COMMERCIAL
bus compatible	68000; 68440; 80186
Maximum FCLK clock frequency	20 MHz
Microprocessor type	IEEE 488 (Universal Interface Bus) Bus Controller

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IEEE 488.2 Controller Chip

NAT9914

Pin compatible with TI TMS9914A

Software compatible with

NEC µPD7210 or TI TMS9914A

controller chips

Low power consumption

Meets all IEEE 488.2 requirements

Bus line monitoring

Preferred implementation of

requesting service

Will not send messages when there

are no Listeners

Performs all IEEE 488.1

interface functions

Programmable data transfer rate

(T1 delays of 350 ns, 500 ns,

1.1 µs, and 2 µs)

Automatic EOS and/or NL message

detection

Direct memory access (DMA)

Automatically processes IEEE 488

commands and reads

undeﬁned commands

TTL-compatible CMOS device

Programmable clock rate

20 MHz maximum

Reduces driver overhead

Does not lose a data byte

if ATN is asserted while

transmitting data

ni.com/store

Description

The NAT9914 IEEE 488.2 controller chip can perform all the

interface functions deﬁned by the IEEE Standard 488.1-1987, and

also meets the additional requirements and recommendations

of the IEEE Standard 488.2-1987. Connected between the

processor and the IEEE 488 bus, the NAT9914 provides high-

level management of the IEEE 488 bus, signiﬁcantly increases

the throughput of driver software, and simplifies both the

hardware and software design. The NAT9914 performs

complete IEEE 488 Talker, Listener, and Controller functions. In

addition to its numerous improvements, the NAT9914 is also

completely pin compatible with the TI TMS 9914A and

software compatible with the NEC µPD7210 and TI TMS9914A

controller chips.

General

The NAT9914 manages the IEEE 488 bus. You program the

IEEE 488 bus by writing control words into the appropriate

registers. CPU-readable status registers supply operational

feedback. The NAT9914 mode determines the function of

these registers. On power up or reset, the NAT9914 registers

resemble those of the TMS9914A set, with additional registers that

supply extra functionality and IEEE 488.2 compatibility. In this

mode, the NAT9914 is completely pin compatible with

the TI TMS9914A. If you enable the 7210 mode, the registers

resemble those of the NEC µPD7210 set, with additional registers

that supply extra functionality and IEEE 488.2 compatibility. This

mode is not pin compatible with the NECµPD7210. Figure 4

shows the key components of the NAT9914.

IEEE 488.2 Overview

The IEEE 488.2 standard removes the ambiguities of IEEE 488.1

by standardizing the way instruments and controllers operate. It

defines data formats, status reporting, error handling, and

common configuration commands to which all IEEE 488.2

instruments must respond in a precise manner. It also deﬁnes a

set of controller requirements. With IEEE 488.2, you gain the

beneﬁts of reduced development time and cost because systems

are more compatible and reliable. The NAT9914 brings the full

power of IEEE 488.2 to the design engineer along with

numerous other design and performance benefits, while

retaining the 40-pin and 44-pin hardware conﬁgurations of the

TI TMS 9914A.

NAT9914BPD Related Products

	NAT9914BPD	NAT9914BPL	NAT9914BPQ	NAT9914
Description	IEEE 488 (GPIB) BUS CONTROLLER, PQCC44	IEEE 488 (GPIB) BUS CONTROLLER, PQCC44	IEEE 488 (GPIB) BUS CONTROLLER, PQCC44	IEEE 488 (GPIB) BUS CONTROLLER, PQCC44
Number of functions	1	1	1	1
Number of terminals	44	44	44	44
Maximum operating temperature	70 Cel	70 Cel	70 Cel	70 Cel
Minimum operating temperature	0.0 Cel	0.0 Cel	0.0 Cel	0.0 Cel
Maximum supply/operating voltage	5.25 V	5.25 V	5.25 V	5.25 V
Minimum supply/operating voltage	4.75 V	4.75 V	4.75 V	4.75 V
Rated supply voltage	5 V	5 V	5 V	5 V
External data bus width	8	8	8	8
Processing package description	Plastic, LCC-44	Plastic, LCC-44	Plastic, LCC-44	Plastic, LCC-44
state	CONSULT MFR	CONSULT MFR	CONSULT MFR	CONSULT MFR
Craftsmanship	CMOS	CMOS	CMOS	CMOS
packaging shape	SQUARE	SQUARE	SQUARE	SQUARE
Package Size	ChipCARRIER	ChipCARRIER	ChipCARRIER	ChipCARRIER
surface mount	Yes	Yes	Yes	Yes
Terminal form	J BEND	J BEND	J BEND	J BEND
Terminal spacing	1.27 mm	1.27 mm	1.27 mm	1.27 mm
Terminal location	Four	Four	Four	Four
Packaging Materials	Plastic/Epoxy	Plastic/Epoxy	Plastic/Epoxy	Plastic/Epoxy
Temperature level	COMMERCIAL	COMMERCIAL	COMMERCIAL	COMMERCIAL
bus compatible	68000; 68440; 80186	68000; 68440; 80186	68000; 68440; 80186	68000; 68440; 80186
Maximum FCLK clock frequency	20 MHz	20 MHz	20 MHz	20 MHz
Microprocessor type	IEEE 488 (Universal Interface Bus) Bus Controller	IEEE 488 (Universal Interface Bus) Bus Controller	IEEE 488 (Universal Interface Bus) Bus Controller	IEEE 488 (Universal Interface Bus) Bus Controller

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