参数资料
型号: EPM7256AE
厂商: Altera Corporation
英文描述: Programmable Logic Device Family(MAX7000A可编程逻辑系列器件)
中文描述: 可编程逻辑器件系列(MAX7000A可编程逻辑系列器件)
文件页数: 10/70页
文件大小: 1614K
代理商: EPM7256AE
10
Altera Corporation
MAX 7000A Programmable Logic Device Family Data Sheet
Preliminary Information
Parallel Expanders
Parallel expanders are unused product terms that can be allocated to a
neighboring macrocell to implement fast, complex logic functions.
Parallel expanders allow up to 20 product terms to directly feed the
macrocell
OR
logic, with five product terms provided by the macrocell and
15 parallel expanders provided by neighboring macrocells in the LAB.
The MAX+PLUS II Compiler can allocate up to three sets of up to
five parallel expanders automatically to the macrocells that require
additional product terms. Each set of five parallel expanders incurs a
small, incremental timing delay (
t
PEXP
). For example, if a macrocell
requires 14 product terms, the Compiler uses the five dedicated product
terms within the macrocell and allocates two sets of parallel expanders;
the first set includes five product terms and the second set includes
four product terms, increasing the total delay by 2
×
t
PEXP
.
Two groups of eight macrocells within each LAB (e.g., macrocells 1
through 8 and 9 through 16) form two chains to lend or borrow parallel
expanders. A macrocell borrows parallel expanders from lower-
numbered macrocells. For example, macrocell 8 can borrow parallel
expanders from macrocell 7, from macrocells 7 and 6, or from macrocells
7, 6, and 5. Within each group of eight, the lowest-numbered macrocell
can only lend parallel expanders and the highest-numbered macrocell can
only borrow them.
Figure 4
shows how parallel expanders can be
borrowed from a neighboring macrocell.
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相关代理商/技术参数
参数描述
EPM7256AEFC100-10 功能描述:CPLD - 复杂可编程逻辑器件 CPLD - MAX 7000 256 Macro 84 IOs RoHS:否 制造商:Lattice 系列: 存储类型:EEPROM 大电池数量:128 最大工作频率:333 MHz 延迟时间:2.7 ns 可编程输入/输出端数量:64 工作电源电压:3.3 V 最大工作温度:+ 90 C 最小工作温度:0 C 封装 / 箱体:TQFP-100
EPM7256AEFC100-10N 功能描述:CPLD - 复杂可编程逻辑器件 CPLD - MAX 7000 256 Macro 84 IOs RoHS:否 制造商:Lattice 系列: 存储类型:EEPROM 大电池数量:128 最大工作频率:333 MHz 延迟时间:2.7 ns 可编程输入/输出端数量:64 工作电源电压:3.3 V 最大工作温度:+ 90 C 最小工作温度:0 C 封装 / 箱体:TQFP-100
EPM7256AEFC100-5 功能描述:CPLD - 复杂可编程逻辑器件 CPLD - MAX 7000 256 Macro 84 IOs RoHS:否 制造商:Lattice 系列: 存储类型:EEPROM 大电池数量:128 最大工作频率:333 MHz 延迟时间:2.7 ns 可编程输入/输出端数量:64 工作电源电压:3.3 V 最大工作温度:+ 90 C 最小工作温度:0 C 封装 / 箱体:TQFP-100
EPM7256AEFC100-7 功能描述:CPLD - 复杂可编程逻辑器件 CPLD - MAX 7000 256 Macro 84 IOs RoHS:否 制造商:Lattice 系列: 存储类型:EEPROM 大电池数量:128 最大工作频率:333 MHz 延迟时间:2.7 ns 可编程输入/输出端数量:64 工作电源电压:3.3 V 最大工作温度:+ 90 C 最小工作温度:0 C 封装 / 箱体:TQFP-100
EPM7256AEFC100-7N 功能描述:CPLD - 复杂可编程逻辑器件 CPLD - MAX 7000 256 Macro 84 IOs RoHS:否 制造商:Lattice 系列: 存储类型:EEPROM 大电池数量:128 最大工作频率:333 MHz 延迟时间:2.7 ns 可编程输入/输出端数量:64 工作电源电压:3.3 V 最大工作温度:+ 90 C 最小工作温度:0 C 封装 / 箱体:TQFP-100