ATF1504ASZ-25QI100

更新时间： 2024-02-24 10:29:04

品牌	Logo	应用领域
爱特美尔 - ATMEL		/
页数	文件大小	规格书
21页	465K
描述
High- Performance EE CPLD

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ATF1504ASZ-25QI100 数据手册

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TTL, SSI, MSI, LSI and classic PLDs. The ATF1504AS’s

enhanced routing switch matrices increase usable gate

count, and the odds of successful pin-locked design modifi-

cations.

block then selects 40 individual signals from the global bus.

Each macrocell also generates a foldback logic term, which

goes to a regional bus. Cascade logic between macrocells

in the ATF1504AS allows fast, efficient generation of com-

plex logic functions. The ATF1504AS contains four such

logic chains, each capable of creating sum term logic with a

fan in of up to 40 product terms.

The ATF1504AS has up to 68 bi-directional I/O pins and 4

dedicated input pins, depending on the type of device pack-

age selected. Each dedicated pin can also serve as a glo-

bal control signal; register clock, register reset or output

enable. Each of these control signals can be selected for

use individually within each macrocell.

The ATF1504AS macrocell shown in Figure 1, is flexible

enough to support highly complex logic functions operating

at high speed. The macrocell consists of five sections:

product terms and product term select multiplexer;

OR/XOR/CASCADE logic; a flip-flop; output select and

enable; and logic array inputs.

Each of the 64 macrocells generates a buried feedback,

which goes to the global bus. Each input and I/O pin also

feeds into the global bus. The switch matrix in each logic

Block Diagram

Unused product terms are automatically disabled by the

compiler to decrease power consumption. A Security Fuse,

when programmed, protects the contents of the

ATF1504AS. Two bytes (16-bits) of User Signature are

accessible to the user for purposes such as storing project

name, part number, revision or date. The User Signature is

accessible regardless of the state of the Security Fuse.

The ATF1504AS device is an In-System Programmable

(ISP) device. It uses the industry standard 4-pin JTAG

interface (IEEE Std. 1149.1), and is fully compliant with

JTAG’s Boundary Scan Description Language (BSDL). ISP

allows the device to be programmed without removing it

from the printed circuit board. In addition to simplifying the

manufacturing flow, ISP also allows design modifications to

be made in the field via software.

ATF1504ASZ

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