UPF [ UNIFIED POWER FORMAT]

UPF [UNIFIED POWER FORMAT]

UPF is used for low power design Intent and this is widely used in Semiconductor Industry.  UPF is abstract of supply distribution and control network specification. This is used through out of design cycle. Everything defined in UPF exists in logic hierarchy of Design

COMMOND USED IN WRITING UPF:

1.       Creating Power Domain

create_power_domain domain_name [-elements list] [-include_scope] [-scope instance_name]

Ø  create_power_domain  PDA  –include_scope

2.       Creating  Supply Port

create_supply_port port_name -domain domain_name [-direction <in | out>]

Ø     create_supply_port VDDMAIN –domain PDA –direction in

3.       Creating Supply NET

create_supply_net net_name -domain domain_name [-reuse] [-resolve < unresolved | one_hot | parallel >]

Ø   create_suply_net VDDMAIN –domain PDA -resolved parallel

4.       Connecting SUPPLY NET

connect_supply_net net_name

[-ports list]

[-pins list]

[< -cells list |

-domain domain_name >]

[< -rail_connection rail_type |

-pg_type pg_type >]*

[-vct vct_name]

Ø  Connect_supply_net  VDDMAIN -port VDDMAIN

5.        Create SUPPLY SET

Ø  Create_supply_set SS_VDDMAIN –function {power VDDMAIN} –function {ground VSS}

6.       Associate Supply Set

Ø  Associate_supply_set  SS_VDDMAIN PDA.primary

7.       Creating Power Switch

create_power_switch switch_name

-domain domain_name

-output_supply_port { port_name supply_net_name }

{-input_supply_port { port_name supply_net_name }}*

{-control_port { port_name net_name }}*

{-on_state {state_name input_supply_port

{boolean_function}}}*

[-on_partial_state { state_name input_supply_port {

boolean_function }}]*

[-ack_port { port_name net_name [{boolean_function}] }]*

[-ack_delay { port_name delay}]*

[-off_state { state_name {boolean_function} }]*

[-error_state { state_name {boolean_function} }]*

Ø  Create_power_switch SW1 –domain PDA –input_supply_port {inp VDDMAIN} –output_supply_ports {out VDDMAINS}

8.  MAP_POWER SWITCH

Ø  map_power_switch SW1 –domain PDA –lib_name <name_of_lib_cell>

9.  ADD PORT STATE

Ø  Add_port_state VDDMAIN –state {on_state 1.000}

10.         Create Power State

Ø  create_pst block.pst –supply { VDDMAIN ____  ____}

Ø  add_pst_state pst_state_1 –pst block.pst –state {on_state off_state ………}

11.         ISOLATION CONTROL

set_isolation iso3 –domain PDgreen –isolation_power_net Vbu –clamp_value 0 –applies_to outputs

set_isolation_control iso3 –domain PDgreen –isolation_signal CPU_iso –location self

Ø  set_isolation  ISO1_clamp0 –domain PDA –isolation_supply_set  SS_VDDAON –element { < list of element>} –clamp_value 0

Ø  set_isolation_control ISO1_clamp0 –domain PDA –isolation_signal isoen –isolation_sence low

12.         Setting Port attribute

Ø  Set_port_attribude –port {<INPUT_PORT>} –driver_supply SS_VDDAON

Ø  Set_port_attribude –port {<OUTPUT_PORT>} –receiver_supply SS_VDDAON