发明名称 |
Enhanced macrocell module for high density CPLD architectures |
摘要 |
An improved CPLD includes a plurality of macrocell modules (MM's) where each MM can receive a relatively large number of independent inputs (at least 80) and can generate at least 5 different product term signals (PT's) therefrom. All 5 PT's may be used for generating a local sum-of-products (SoP). Any of the 5 PT's may be stolen (steered-away) to instead provide a local control for its macrocell module. Each module includes a local SoS-producing gate that can produce a sums-of-sums signal (SoS) that represents a Boolean sum of one or more of the local SoP signal, of SoP signals of neighboring macrocell modules, and of SoS signals of neighboring macrocell modules. Simple allocation and super-allocation may be used to produce sums-of-sums signals of relatively large, one-pass function depth, such as 160PT's in one pass.
|
申请公布号 |
US6150841(A) |
申请公布日期 |
2000.11.21 |
申请号 |
US19990326140 |
申请日期 |
1999.06.06 |
申请人 |
LATTICE SEMICONDUCTOR CORPORATION |
发明人 |
AGRAWAL, OM P.;STANLEY, CLAUDIA A.;HE, XIAOJIE (WARREN);LEE, CHONG M.;BALZLI, JR., ROBERT M.;METZGER, LARRY R.;ILGENSTEIN, KERRY A. |
分类号 |
H03K19/177;(IPC1-7):H03K19/177 |
主分类号 |
H03K19/177 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|