AK8817 Datasheet, PDF (10/43 Pages) Asahi Kasei Microsystems – NTSC/PAL Digital Video Encoder

ASAHI KASEI
(4) Reset
(4-1) Reset Timing
RSTN
CLKIN
12
pRES
99 100
[AK8817]
Parameter
RSTN Pulse Width
Symbol
Min.
Typ.
Max
pRES
100
Unit
CLKs
(4-2) Power Down Sequence / Reset Sequence
Before PDN setting ( PDN to low ), Reset must be enabled for a duration of longer-than-100 clock time.
After PDN release ( PDN to high ), Reset must be enabled for 10 mS or longer till analog part reference voltage &
current are stabilized.
CLKIN
(CLKOUT=H)
RSTN
sRES
hRES
VIH
VIL
PDN
VIH
GND
Parameter
Symbol
Min.
Typ.
Max
Unit
RSTN Pulse Width
sRES
100
CLKs
Time from PDN to high to RSTN to
high
hRES
10
msec
SCL low duration before RSTN to
rise
tSCLL
50
nsec
At power-down, all control signals must be surely connected to either the selected power supply or ground level, and not
to VIH / VIL levels.
MS0413-E-00
10
2005 / Aug