AK8456 Datasheet, PDF (17/32 Pages) Asahi Kasei Microsystems – 3 channel input 16bit 30MSPS Video ADC with LED driver

[AK8456]

9. Functional Description
 Start Up
There is no restriction on order of turning on AVDD, OVDD and LVDD.
Please take a reset by hold RESETB low level when the power AVDD is turned on.
LEDEN_R/G/B must be low level during RESETB rises. User can access to the registers
after wait time that are shown in followed figures from power-up.
Fig.17 Not Use Power on Reset
AVDD (3.3V)
RESETB
Internal Reference circuits (related to LDO) are
activated immediately. A few mA consumption
LDO start
DVO
(LDO Output)
(1.8V)
Access to Register
Not available (Reset)
Available
LEDEN_R/G/B
a few ms
~1ms
LEDEN_R/G/B are must be all low when RESETB rise to
high.
014002433-E-00
- 17 -
2014/06