Filename : SN54xx140_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_SN54xx140.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_SN54xx140.vhd      -- WAVES test program
SN54xx140_timing.vhd          -- timing package
SN54xx140_TB.vhd              -- test bench entity/architecture
SN54xx140.vhd                 -- entity/architecture
SN54xx140_DIP14.vhd           -- structural entity-architecure for
                                physical package
SN54xx140_TB_CON.vhd          -- top level configuration of TEST BENCH



Revision History (by file):  

+--------------------------------------------------------------------+
| All files:                                                         |
+--------------------------------------------------------------------+
Version 2.1 updates

2-08-91  / S. Turner /
  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

+--------------------------------------------------------------------+
| SN54xx140.vhd                                                       |
+--------------------------------------------------------------------+
Version 2.1 updates

08-12-91    / M. Meier /
  changed library WORK to library SN54xx140

08-07-91    / M. Meier /
  changed POWER to VCC-GND

08-02-91    / M. Meier /
  removed all packaging info which was already in DIP file

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' states which were neglected

07-15-91    / S. Turner /
  removed GENERIC_VALUES option

07-02-91    / C. Collins /
  added operating conditions

2-08-91  / S. Turner /
  Changed parameter names to reflect changed in entity's generic map

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

+--------------------------------------------------------------------+
| SN54xx140_timing.vhd                                                |
+--------------------------------------------------------------------+
Version 2.1 updates

08-02-91    / S. Turner /
  fixed capacitance normalization errors

08-01-91    / M. Meier /
  changed all 0.0 timing parameters to others=>(others=>0 ns)

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

07-15-91    / S. Turner /
  removed GENERIC_VALUES option

07-02-91    / C. Collins /
  corrected prop delays

2-08-91  / S. Turner /
  Added GEN_CWIRES and GEN_PARAMS to GET_TIMING() parameter list 
  Added KCHL and KCLH capacitance derating factors for each output pin
  Added capacitance derating coefficients for CALC_CURVE()
  Added WIRE_FACTOR constant to convert wire capacitance into delay time
  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
  Eliminated GENERIC/TIMING/ANNOTATED option -- Generic timing parameters
    are now selected with the GENERIC_VALUES option of TIME_MODE in the 
    SIMFLAG package.  Back-annotation of capacitance values occurs automatically
    when capacitances other than the default are passed in.
  All PROP_DELAYS are now multiplied by the capacitance derating factor,
    in addition to voltage and temperature factors.

+--------------------------------------------------------------------+
| SN54xx140_TB.vhd                                                    |
+--------------------------------------------------------------------+
Version 2.1 updates

08-12-91    / M. Meier /
  changed library WORK to library SN54xx140

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

08-07-91    / M. Meier /
  changed POWER to VCC-GND

07-28-91    / S. Turner /
  changed "OUT.DAT" to "out.dat"
  changed STD_PACK.LOGIC_SYSTEM to IEEE.STD_LOGIC_1164

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

07-15-91    / S. Turner /
  removed GENERIC_VALUES option

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

+--------------------------------------------------------------------+
| SN54xx140_DIP14.vhd                                                 |
+--------------------------------------------------------------------+
Version 2.1 updates

08-08-91    / M. Meier /
  moved configuration specification from CON file to DIP file

08-07-91    / M. Meier /
  changed POWER to VCC-GND

07-29-91    / M. Meier /
  added recommended and worst case operating conditions

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

07-15-91    / S. Turner /
  removed GENERIC_VALUES option

07-02-91    / C. Collins /
  added comment for J package

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

+--------------------------------------------------------------------+
| SN54xx140_TB_CON.vhd                                                |
+--------------------------------------------------------------------+
Version 2.1 updates

08-12-91    / M. Meier /
  removed STD and LS families since not available.

08-12-91    / M. Meier /
  changed library WORK to library SN54xx140

08-08-91    / M. Meier /
  moved configuration specification from CON file to DIP file

07-16-91    / M. Meier /
  changed default family to 'S'.

07-15-91    / S. Turner /
  removed GENERIC_VALUES option

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

+--------------------------------------------------------------------+
| waves_device_SN54xx140.vhd                                          |
+--------------------------------------------------------------------+
Version 2.1 updates

08-07-91    / M. Meier /
  changed POWER to VCC-GND

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

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

+--------------------------------------------------------------------+
| wgenerator_SN54xx140.vhd                                           |
+--------------------------------------------------------------------+
Version 2.1 updates

08-12-91    / M. Meier /
  changed library WORK to library SN54xx140

08-09-91    / M. Meier /
  replaced tabs with 4 spaces

08-07-91    / M. Meier /
  changed POWER to VCC-GND

07-30-91    / M. Meier /
  changed 'D' to '-'

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

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

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


