Function Description
FUNCTION TABLE
INPUTS
OUTPUTS
FUNCTON
SCLK PCLK /OE /SCLR DINx
DOUTx
QxN
X
X
X
L
L
L
L
X
X
L
L
NC
L
A LOW level on /SCLR only affects the shift registers
Empty shift register loaded into storage register
↑
Shift register clear. Parallel outputs in high-impedance
OFF-state
X
X
X
H
L
X
L
Z
Logic high level shifted into shift register stage 0.
Contents of all shift register stages shifted through, e.g.
previous state of stage 6 (internal Qx6’) appears on the
serial output (DOUTx)
↑
L
H
H
Qx6’
NC
Contents of shift register stages (internal Qxn’) are
Qxn’ transferred to the storage register and parallel output
↑
↑
X
L
L
H
H
X
X
NC
stages
Contents of shift register shifted through. Previous
Qxn’ contents of the shift register are transferred to the
storage register and the parallel output stages.
↑
Qx6’
Notes
H = HIGH voltage level; L = LOW voltage level
↑ = LOW-to-HIGH transition; ↓ = HIGH-to-LOW
Z = high-impedance OFF-state; NC = no change
X = don’t care.
4
MA007A Technical Summary
MEGAWIN
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