SAMHOP Microelectronics Corp.
8-BIT CONSTANT CURRENT LED DRIVER
TIMING WAVEFORM
1. CLOCK, SERIAL-IN, SERIAL-OUT, OUTn
tr
tf
tw CLK
90%
tw CLK
90%
50%
10%
50%
50%
10%
CLOCK
SERIAL-IN
t
setup(D)
thold(D)
50%
50%
tor
tof
90%
50%
10%
90%
50%
10%
OUTn (current)
tpLH
tpHL
90%
50%
10%
90%
50%
10%
SERIAL-OUT
2. CLOCK-LATCH
CLOCK
t
pLH
tpHL
50%
50%
SERIAL-IN
LATCH
"L" level = DATA HOLD
50%
50%
tW LAT
ts
etup(L)
3. ENABLE-OUTn
tW EN
ENABLE
50%
50%
tpLH
tpHL
50%
50%
OUTn (Current)
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V.2.10