參數(shù)資料
型號(hào)： ATF1508BE-7AU100
廠商： Atmel
文件頁(yè)數(shù)： 27/30頁(yè)
文件大小： 0K
描述： IC CPLD 128MC 1.8V ISP 100TQFP
標(biāo)準(zhǔn)包裝： 90
系列： ATF15xx
可編程類型： 系統(tǒng)內(nèi)可編程（最少 10,000 次編程/擦除循環(huán)）
最大延遲時(shí)間 tpd(1)： 7.5ns
電壓電源 - 內(nèi)部： 1.7 V ~ 1.9 V
宏單元數(shù)： 128
輸入/輸出數(shù)： 80
工作溫度： -40°C ~ 85°C
安裝類型： 表面貼裝
封裝/外殼： 100-TQFP
供應(yīng)商設(shè)備封裝： 100-TQFP（14x14）
包裝： 托盤(pán)
6
3663A–PLD–1/08
ATF1508BE
Each of the 128 macrocells generates a buried feedback signal that goes to the global bus (see
Figure 1-3). Each input and I/O pin also feeds into the global bus. The switch matrix in each logic
block then selects 40 individual signals from the global bus. Each macrocell also generates a
foldback logic term that goes to a regional bus. Cascade logic between macrocells in the
ATF1508BE allows fast, efficient generation of complex logic functions. The ATF1508BE con-
tains eight such logic chains, each capable of creating sum term logic with a fan-in of up to 40
product terms.
The ATF1508BE macrocell, shown in Figure 1-4, is highly flexible and capable of supporting
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.
A security fuse, when programmed, protects the contents of the ATF1508BE. Two bytes
(16 bits) of User Electronic Signature are accessible to the user for purposes such as storing
project name, part number, revision or date. The User Electronic Signature is accessible regard-
less of the state of the security fuse.
The ATF1508BE device supports In-System Programming (ISP) via the industry-standard 4-pin
JTAG interface (IEEE 1532 standard), and is fully compliant with IEEE 1149.1 for Boundary
Scan Test. 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.
Figure 1-4.
ATF1508BE Macrocell
SCHMITT
TRIGGER
SSTL
BURIED FEEDBACK
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