Cell Library中nom_voltage和nom_process 两个参数是什么意思？
时间：10-02
整理：3721RD
点击：
如题，有谁知道Cell Library中nom_voltage和nom_process 两个参数是什么意思?
library (vsclib013) { /* Post layout timing */
technology (cmos) ;
/* choose one delay_model */
/* delay_model: generic_cmos ; */ /* Prop-Ramp */
delay_model: table_lookup ; /* LUT */
date: "06-Jan-08" ;
revision: 0.10.1 ;
comment: "Copyright (c) 2004-2008 Malta Open Silicon Libraries. Released under the LGPL." ;
time_unit
: "1ps" ;
voltage_unit
: "1mV" ;
current_unit
: "1mA" ;
pulling_resistance_unit : "1kohm" ;
capacitive_load_unit (1.00,ff) ;
leakage_power_unit: "1pW" ;
nom_voltage: 1.2 ;
nom_process: 1.0 ;
nom_temperature: 27.0 ;
operating_conditions (NOM_1.2_27) {
process:1.0 ;
voltage:1.2 ;
temperature : 27.0 ;
tree_type: "balanced_tree" ;
}
library (vsclib013) { /* Post layout timing */
technology (cmos) ;
/* choose one delay_model */
/* delay_model: generic_cmos ; */ /* Prop-Ramp */
delay_model: table_lookup ; /* LUT */
date: "06-Jan-08" ;
revision: 0.10.1 ;
comment: "Copyright (c) 2004-2008 Malta Open Silicon Libraries. Released under the LGPL." ;
time_unit
: "1ps" ;
voltage_unit
: "1mV" ;
current_unit
: "1mA" ;
pulling_resistance_unit : "1kohm" ;
capacitive_load_unit (1.00,ff) ;
leakage_power_unit: "1pW" ;
nom_voltage: 1.2 ;
nom_process: 1.0 ;
nom_temperature: 27.0 ;
operating_conditions (NOM_1.2_27) {
process:1.0 ;
voltage:1.2 ;
temperature : 27.0 ;
tree_type: "balanced_tree" ;
}
不知道发这个版块合适不。有没有高手帮忙解答一下，小弟急用，在此先谢过啦！
The nom_process attribute define process scaling，one of the nominal operating conditions for a library.The nom_voltage attribute defines voltage,one of the nominal operating conditions for a library .
Library Compiler creates the default operating conditions by using the values specified for the nom_calc_mode,nom_voltage,and nom_temperature attributes and by assuming a value of balanced_tree for the tree_type attribute.
字面意思看懂了，但还是不知道是什么意思?