Subversion Repositories rtc

/* Constraints */

CLK_UNCERTAINTY = 0.1   /* 100 ps */

DFFHQX2_CKQ = 0.2       /* Clk to Q in technology time units */

DFFHQX2_SETUP = 0.1     /* Setup time in technology time units */

/* Clocks constraints */

create_clock CLK -period CLK_PERIOD

create_clock ECLK -period CLK_PERIOD

set_clock_skew all_clocks() -uncertainty CLK_UNCERTAINTY

set_dont_touch_network all_clocks()

/* Reset constraints */

set_driving_cell -none RST

set_drive 0 RST

set_dont_touch_network RST

/* All inputs except reset and clock */

all_inputs_wo_rst_clk = all_inputs() - CLK - RST

/* Set output delays and load for output signals

 *

 * All outputs are assumed to go directly into

 * external flip-flops for the purpose of this

 * synthesis

 */

set_output_delay DFFHQX2_SETUP -clock CLK all_outputs()

set_load load_of(typical/DFFHQX2/D) * 1 all_outputs()

/* Input delay and driving cell of all inputs

 *

 * All these signals are assumed to come directly from

 * flip-flops for the purpose of this synthesis

 *

 */

set_input_delay DFFHQX2_CKQ -clock CLK all_inputs_wo_rst_clk

set_driving_cell -cell DFFHQX2 -pin Q all_inputs_wo_rst_clk

/* Set design fanout */

/*

set_max_fanout 10 TOPLEVEL

*/

/* Set area constraint */

set_max_area MAX_AREA

/* Optimize all near-critical paths to give extra slack for layout */

c_range = CLK_PERIOD * 0.05

group_path -critical_range c_range -name CLK -to CLK

/* Operating conditions */

set_operating_conditions typical