AS3645 austriamicrosystems, AS3645 Datasheet - Page 7

• Manufacturer Part Number: AS3645
• Description: 1000/720ma Ultra Small High Efficient Single/dual Led Flash Driver With Safety Features
• Manufacturer: austriamicrosystems

AS3645
Datasheet - E l e c t r i c a l C h a r a c t e r i s t i c s
5. During every startup the logic level of the pin I2C/EN is checked. If a logic low is detected, the pin I2C/EN is
6. After this period, the first clock pulse is generated.
7. A device must internally provide a hold time of at least 300ns for the SDA_EN2 signal (referred to the V
8. A fast-mode device can be used in a standard-mode system, but the requirement t
Timing Diagrams
Figure 3. I
www.austriamicrosystems.com
SCL_EN1
SDA_EN2
forced to V
parallel interface mode with adjustable output currents).
the SCL_EN1 signal) to bridge the undefined region of the falling edge of SCL_EN1.
be met. This is automatically the case if the device does not stretch the LOW period of the SCL_EN1 signal. If
such a device does stretch the LOW period of the SCL_EN1 signal, it must output the next data bit to the
SDA_EN2 line t
STOP
2
C mode Timing Diagram
ISET
START
. If the resulting current is below I
R
max + t
t
BUF
t
LOW
t
HD:STA
SU:DAT
t
HD:DAT
t
R
= 1000 + 250 = 1250ns before the SCL_EN1 line is released.
t
HIGH
RESDET_I2C/EN
t
t
Revision 1.6
SU:DAT
F
, an external resistor R
REPEATED
START
t
SU:STA
t
HD:STA
SU:DAT
ISET
= to 250ns must then
is assumed (mode:
t
SU:STO
IHMIN
of
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