General Description: When assigning power mode in VHDL for a CPLD design using the PWR_MODE attribute in an XVHDL (Metamor) VHDL file gives the following warning:
WARNING:basnu:159 - Attribute "PWR_MODE" on "we_n" is on the wrong type of object. Please see the "Attributes, Constraints, and Carry Logic" section of the Libraries Guide for more information on this attribute.
Solution
The workaround is to create intermediate nodes/signals and place the PWR_MODE attribute on the intermediate nodes/signals.
VHDL Example:
library METAMOR; use METAMOR.attributes.all;
entity power is
port ( DISPA : out STD_LOGIC_VECTOR (6 downto 0); DISPB : out STD_LOGIC_VECTOR (6 downto 0) ) ; end power;
architecture fib_arch of fib is
signal mydispa, mydispb : std_logic_vector (6 downto 0); ATTRIBUTE PWR_MODE:STRING;
ATTRIBUTE CRITICAL OF mydispa: SIGNAL IS TRUE; ATTRIBUTE PWR_MODE OF mydispa: SIGNAL IS "LOW";
ATTRIBUTE CRITICAL OF mydispb: SIGNAL IS TRUE; ATTRIBUTE PWR_MODE OF mydispb: SIGNAL IS "STD"; . . .
DISPA <= mydispa; DISPB <= mydispb;
end power_arch ;
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AR# 4697
Date
01/02/2000
Status
Archive
Type
General Article
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