I'll provide you with a complete Real Time Clock (RTC) design in Verilog, including the main module, testbench, and SDC constraints file for Cadence implementation.

Key Features of the RTC Design:

Main RTC Module (rtc.v):

• 24-hour format time keeping (HH:MM:SS)
• Set mode for initializing time
• Enable/disable functionality
• Tick outputs for second, minute, and hour transitions
• Asynchronous reset

Clock Divider Module:

• Converts high-frequency system clock to 1Hz
• Configurable division ratio
• Clean 50% duty cycle output

Testbench Features:

• Comprehensive test scenarios
• Rollover testing (59→00, 23→00)
• Set mode verification
• Enable/disable testing
• Reset functionality testing
• Waveform dumping for analysis

SDC Constraints:

• Clock definitions for multiple clock domains
• Input/output timing constraints
• Environmental constraints (drive strength, load capacitance)
• Design rule constraints (transition time, fanout, capacitance)
• Power and area optimization settings
• False path specifications for asynchronous signals

Implementation Steps in Cadence:

1. Synthesis (Genus):

   genus -files rtc.v -sdc rtc.sdc

2. Place & Route (Innovus):

   • Import netlist and constraints
   • Floorplan and power planning
   • Placement and routing
   • Timing closure

3. Verification:

   • Run the testbench in simulation
   • Verify timing with STA
   • Check power analysis

This design provides a solid foundation for RTC implementation in Cadence tools with proper timing constraints and comprehensive verification.