diff options
Diffstat (limited to 'src/lib/netlist/devices/nld_7493.cpp')
-rw-r--r-- | src/lib/netlist/devices/nld_7493.cpp | 60 |
1 files changed, 0 insertions, 60 deletions
diff --git a/src/lib/netlist/devices/nld_7493.cpp b/src/lib/netlist/devices/nld_7493.cpp index 7ad8aedc13f..2fce9523c0b 100644 --- a/src/lib/netlist/devices/nld_7493.cpp +++ b/src/lib/netlist/devices/nld_7493.cpp @@ -57,66 +57,6 @@ #include "nld_7493.h" #include "netlist/nl_base.h" -//- Identifier: TTL_7493_DIP -//- Title: 7493 Binary Counters -//- Description: -//- Each of these monolithic counters contains four master-slave -//- flip-flops and additional gating to provide a divide-by-two -//- counter and a three-stage binary counter for which the -//- count cycle length is divide-by-five for the 90A and divide-by-eight -//- for the 93A. -//- -//- All of these counters have a gated zero reset and the 90A -//- also has gated set-to-nine inputs for use in BCD nine’s complement -//- applications. -//- -//- To use their maximum count length (decade or four-bit binary), -//- the B input is connected to the Q A output. The input count pulses -//- are applied to input A and the outputs are as described in the -//- appropriate truth table. A symmetrical divide-by-ten count can be -//- obtained from the 90A counters by connecting the Q D output to the -//- A input and applying the input count to the B input which gives -//- a divide-by-ten square wave at output Q A. -//- -//- Pinalias: B,R01,R02,NC,VCC,NC,NC,QC,QB,GND,QD,QA,NC,A -//- Package: DIP -//- NamingConvention: Naming conventions follow National Semiconductor datasheet -//- Limitations: Internal resistor network currently fixed to 5k -//- more limitations -//- Example: ne555_astable.c,ne555_example -//- FunctionTable: -//- Counter Sequence -//- -//- | COUNT || QD | QC | QB | QA | -//- |------:||:--:|:--:|:--:|:--:| -//- | 0 || 0 | 0 | 0 | 0 | -//- | 1 || 0 | 0 | 0 | 1 | -//- | 2 || 0 | 0 | 1 | 0 | -//- | 3 || 0 | 0 | 1 | 1 | -//- | 4 || 0 | 1 | 0 | 0 | -//- | 5 || 0 | 1 | 0 | 1 | -//- | 6 || 0 | 1 | 1 | 0 | -//- | 7 || 0 | 1 | 1 | 1 | -//- | 8 || 1 | 0 | 0 | 0 | -//- | 9 || 1 | 0 | 0 | 1 | -//- | 10 || 1 | 0 | 1 | 0 | -//- | 11 || 1 | 0 | 1 | 1 | -//- | 12 || 1 | 1 | 0 | 0 | -//- | 13 || 1 | 1 | 0 | 1 | -//- | 14 || 1 | 1 | 1 | 0 | -//- | 15 || 1 | 1 | 1 | 1 | -//- -//- Note C Output QA is connected to input B -//- -//- Reset Count Function table -//- -//- | R01 | R02 | QD | QC | QB | QA | -//- |:---:|:---:|:--:|:--:|:--:|:--:| -//- | 1 | 1 | 0 | 0 | 0 | 0 | -//- | 0 | X | COUNT |||| -//- | X | 0 | COUNT |||| -//- -//- namespace netlist { |