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Label
Short for
Meaning
Ix
InputData
Iriputs tc) combinatorial circuits
J,K
Inputs to JK flip flops
Dx
Inputs to D flip flops and latches
S,RPx
Set, ResetAddressEnable
Inputs to JK and D flip flops,
latches, registers, and counters;
R resets output to LOW; S sets
output to HIGH
Inputs tc) registers and counters
AxE
Inputs used for selection of an in-
put, output, data route, or memory
location:°:::::1:npu"Sed to §ynchronous|y )loadinformat:ioninparallelinto
PEMRCLCP
Parallel EnableMasterResetClearClockPulse
I I n p u t w h i c h r e s e t s a s y n c h r o n o u s l y
all outputs to LOW, overriding all
other inputs
Input which resets outputs to LOW,
but does not override all other
ir,putsControl inputs to counters
CE,
CEP,
GET
Count Enable
Ox
OutputTerTninal Count
Outputs of combiriacorial circuits
Qx
Outputs of sequential circuits
TC
(Output of a counter indicating
1111 for up binary counters, tool
for up decimal counters, or 0000
for down counters) .
Table
8.6.1.
8-3
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