Filename : SN54xx00_notes.txt

Applicable Files (listed in order of analysis):  

IEEE/std_logic_1164.pkg.vhd  -- 9-state logic system

STD_PACK/MISC_FUNC.vhd       -- miscellaneous functions
STD_PACK/TIME_FUNC.vhd       -- timing functions
STD_PACK/SIMFLAG_.vhd        -- simulation flag declarations
STD_PACK/SIMFLAG.vhd         -- simulation flag assignments
STD_PACK/TTL_TIMING.vhd      -- environmental derating coefficients

STD_WAVES/STANDARD/waves_system.vhd    -- describes Event Value objects
STD_WAVES/STANDARD/waves_standard.vhd  -- basic WAVES definition
STD_WAVES/LOCAL/waves_events.vhd       -- links events to logic values
STD_WAVES/STANDARD/waves_interface.vhd -- defines functions for application of
                                          input values and file input of vectors

waves_device_SN54xx00.vhd              -- test pins package
STD_WAVES/LOCAL/waves_frames.vhd       -- links event values to pin codes
STD_WAVES/STANDARD/waves_objects.vhd   -- defines functions that create slices
STD_WAVES/LOCAL/waves_utilities.vhd    -- defines functions to check responses
                                          and to output port values to a file

wgenerator_SN54xx00.vhd      -- WAVES test program
SN54xx00_timing.vhd          -- timing package
SN54xx00_TB.vhd              -- test bench entity/architecture
SN54xx00.vhd                 -- entity/architecture
SN54xx00_DIP14.vhd           -- structural entity-architecure for
                                physical package
SN54xx00_TB_CON.vhd          -- top level configuration of TEST BENCH



Revision History (by file):  

+--------------------------------------------------------------------+
| All files:                                                         |
+--------------------------------------------------------------------+
2-08-91  / S. Turner / Version 2.1 updates
  SIMFLAG package is now in STD_PACK library
  New convention for capitalization:
    ALL CAPS :  variables, constants, functions, design units
    First_Cap:  type definitions
    all_lower:  reserved VHDL keywords

12-19-90 / G. Newell / Version 1.1 created

+--------------------------------------------------------------------+
| SN54xx00.vhd                                                       |
+--------------------------------------------------------------------+
Version 2.1 updates

08-12-91    / M. Meier /
  changed WORK to SN54xx00

08-05-91    / S. Turner /
  changed POWER to VCC-GND

08-02-91    / M. Meier /
  changed local output signal type to UX01Z.

07-30-91    / M. Meier /
  changed not(POWER... to BIT_UNKNOWN(POWER)

07-28-91    / S. Turner /
  moved entity-declarations & architecture-bodies into 1 file
  changed STD_PACK.LOGIC_SYSTEM to IEEE.STD_LOGIC_1164

07-19-91    / M. Meier /
  added 'L' and 'H' which were neglected

07-02-91    / C. Collins /
  replaced SN54S and SN54LS with SN54xx

2-08-91  / S. Turner /
  Changed parameter names to reflect changed in entity's generic map
  Moved notes and comments into this file (SN54xx00_notes.txt)

1-09-91  / G. Newell / 
  Replaced "Filter2" with "CONVERT_TO_UX01" (same purpose)

+--------------------------------------------------------------------+
| SN54xx00_timing.vhd                                                |
+--------------------------------------------------------------------+
Version 2.1 updates

07-29-91    / M. Meier /
  changed worst case tphl temperature

07-28-91    / S. Turner /
  moved entity-declarations & architecture-bodies into 1 file
 
07-16-91    / S. Turner /
  removed TIMING_PARAMS declaration

07-02-91    / C. Collins /
  replaced SN54S and SN54LS with SN54xx

2-08-91  / S. Turner /
  Added KCHL and KCLH capacitance derating factors for each output pin
  Added capacitance derating coefficients for CALC_CURVE()
  Following "EIA Timing and Environmental Data Specification" guidelines to 
    calculate missing manufacturer's timing parameters
  Changed parameter names to reflect changed in entity's generic map
  Back-annotation of capacitance values occurs automatically
    when capacitances other than the default are passed in.
    All delays are now multiplied by the capacitance derating factor,
    in addition to voltage and temperature factors.
  Eliminated Eflags type in favor of separate XGEN and TIMING_MESG flags
  Manufacturer's timing parameters grouped into MIN, TYP, MAX constants

+--------------------------------------------------------------------+
| SN54xx00_TB.vhd                                                    |
+--------------------------------------------------------------------+
Version 2.1 updates

08-12-91    / M. Meier /
  changed library WORK to library SN54xx00

08-08-91    / M. Meier /
  removed WAVES ascii chart

08-05-91    / S. Turner /
  changed POWER to VCC-GND

07-28-91    / S. Turner /
  moved entity-declarations & architecture-bodies into 1 file
 
07-02-91    / C. Collins /
  replaced SN54S and SN54LS with SN54xx

6-11-91     / S. Turner / Version 2.1 created

+--------------------------------------------------------------------+
| SN54xx00_DIP14.vhd                                                 |
+--------------------------------------------------------------------+
Version 2.1 updates

08-07-91    / S. Turner /
  changed DIP to use internal configuration specification

08-05-91    / S. Turner /
  changed POWER to VCC-GND

07-28-91    / S. Turner /
  changed STD_PACK.LOGIC_SYSTEM to IEEE.STD_LOGIC_1164

07-15-91    / C. Collins /
  added comments from SN54xx00_.vhd file

07-02-91    / C. Collins /
  replaced SN54S and SN54LS with SN54xx

6-11-91     / S. Turner / Version 2.1 created

+--------------------------------------------------------------------+
| SN54xx00_TB_CON.vhd                                                |
+--------------------------------------------------------------------+
Version 2.1 updates

08-12-91    / M. Meier /
  changed library WORK to library SN54xx00

08-07-91    / S. Turner /
  changed DIP to use internal configuration specification

07-11-91    / S. Turner /
  removed GENERIC_VALUES, using TTL_TIMING package

07-02-91    / C. Collins /
  replaced SN54S and SN54LS with SN54xx

6-11-91     / S. Turner / Version 2.1 created

+--------------------------------------------------------------------+
| waves_device_SN54xx00.vhd                                          |
+--------------------------------------------------------------------+
Version 2.1 updates

08-05-91    / S. Turner /
  changed POWER to VCC-GND

07-28-91    / S. Turner /
  moved entity-declarations & architecture-bodies into 1 file

07-02-91    / C. Collins /
  replaced SN54S and SN54LS with SN54xx

6-11-91     / S. Turner / Version 2.1 created

+--------------------------------------------------------------------+
| wgenerator_SN54xx00.vhd                                            |
+--------------------------------------------------------------------+
Version 2.1 updates

08-12-91    / M. Meier /
  changed WORK to SN54xx00

08-05-91    / S. Turner /
  changed POWER to VCC-GND

07-28-91    / S. Turner /
  moved entity-declarations & architecture-bodies into 1 file

07-12-91    / M. Meier /
  added new test vectors

07-04-91    / M. Meier /
  added new timing vectors

07-02-91    / C. Collins /
  replaced SN54S and SN54LS with SN54xx

6-11-91     / S. Turner / Version 2.1 created


