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AS3606 Datasheet(PDF) 31 Page - ams AG

Part No. AS3606
Description  System PMU with HV Back Light Driver
Download  71 Pages
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Maker  AMSCO [ams AG]
Homepage  http://www.ams.com
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AS3606 Datasheet(HTML) 31 Page - ams AG

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www.austriamicrosystems.com
Revision 1.03
30 - 70
AS3606 AS3607 2v2
Data Sheet - D e t a i l e d D e s c r i p t i o n - S Y S T E M F u n c t i o n s
9.6 GPIO Pins
AS3607 features 4 GPIO pins, AS3606 has 2 GPIO pins.
If not re-configured in the start-up sequence GPIO1, GPIO3 and GPIO4 are input per default.GPIO2 is set to output and the pin is driven to low
right at the beginning of the startup sequence. GPIO3/4 have one state defined as input and three states as output. The following table shows
the different input/output options.
When configured as input the following functionality is available:
ADC input, to measure external voltage sources
Wake-up input to return from hibernation
Hibernation enable input (GPIO1/2/3 only)
PWM dimming input (GPIO1/2/3 only)
GPIO pins have a 200kOhm pull-down resistor activated when they are used as an input. (HiZ-mode).
Please note that all GPIO pins are open-drain outputs. They can only output a logic “high” if a pull-up and the corresponding pull-up voltage is
present.
Table 14. GPIO Configuration
GPIO1
GPIO2
GPIO4/3
00
xCharging (1Hz pulses)
LOW
HiZ / HiZ (input)
01
xVSUP_low
xVSUP_low
xVSUP_low / xCharging (1Hz pulses)
10
xPWRUP
HIGH
xPWRUP / PWRGOOD
11
PWRGOOD
xCharging (1Hz pulses)
xEOC / xCharger_active
Table 15. GPIO Output Functions
Function
Description
xCharging (1Hz pulses)
The output will be high when the charger is no active. The output toggles between high and low as
long as the charging is on going. If EOC, a timeout or overtempertur event stops the charger the
output stops toggling.
xCharger_active
The output will be high when the charger is no active or in EOC; it will be low if the charger is active.
xEOC
The output will be high when the charger active; it will be low if the charger is has reached EOC.
The output will return back to high if the charger enters resume state.
xPWRUP
The output will get low if the PWRUP pin is high.
PWRGOOD
The output will be high about 3ms after the start-up seuence is finished. It will be low during the
sequence. Please be sure to configure the GPIO before the pull-up voltage, otherwise the output
will be high as long as the GPIOs are default inputs.
xVSUP_low
The output will get low if the VSUP undervoltage level is reached.
HIGH
The output will be high.
LOW
The output will be low.


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