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UPD64084 Datasheet(PDF) 13 Page - NEC

Part # UPD64084
Description  THREE-DIMENSIONAL Y/C SEPARATION LSI WITH ON-CHIP MEMORY
PDF  66 Pages
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Manufacturer  NEC [NEC]
Direct Link  http://www.nec.com/
Logo NEC - NEC

UPD64084 Datasheet(HTML) 13 Page - NEC

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µµµµ PD64084
13
Data Sheet S16021EJ2V0DS
2.4
Start-up of Power Supply and Reset
It is necessary to reset the I2C bus interface immediately when it is supplied with power. When reset, the I2C bus
interface releases its SDA line and becomes operative. In addition, its write register is previously loaded with an initial
value.
<1> When the power is switched on, wait until the power supply line reaches and settles on a 3.3-V/2.5-V level
before starting initialization.
<2> Initialize the I2C bus interface circuit by keeping the RSTB pin at a low level for at least 10
µs.
<3> Start communication on the I2C bus interface after 100
µs from pull up the RSTB pin to a high level.
Figure 2-2. I2C Bus Interface Reset Sequence
DVDDIO
RSTB='L'
3.3 V start-up
Power ON
I2C bus access disable
I2C bus access enable
Serial bus register data setting
3.3 V
0 V
2.5 V
0 V
3.3 V
0 V
RSTB='H'
DVDD
RSTB
2.5 V start-up
3.3 V cut-off
2.5 V cut-off
s MIN.
10
µ
s MIN.
100
µ
Don't care
Caution
Reset is always necessary whether using the serial bus register or not.



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