AS3689 datasheet(61/72 Pages) AMSOSRAM

61 / 72 page

AS3689

austriami crosyst ems

Datasheet, Confidential

www.austriamicrosystems.com (mlg, ptr)

Revision 1.0.2 / 20070115

59 - 70

7.11 Operating Modes

If the voltage on VDD_GPIO is less than 0.3V, the AS3689 is in shutdown mode and its current consumption is

minimized (I(BAT) = ISHUTDOWN) and all internal registers are reset to their default values and the serial interface

is disabled.

If the voltage on VDD_GPIO rises above 1.5V, the AS3689 serial interface is enabled and the AS3689 and the

standby mode is selected. The AS3689 is switched automatically from standby mode (I(BAT) = ISTANDBY) into

normal mode (I(BAT) = IACTIVE) and back, if one of the following blocks are activated:

Ldo

Charge pump

External charge pump

Step up regulator

Any current sink

ADC conversion started

PWM active

Pattern mode active.

If any of these blocks are already switched on the internal oscillator is running and a write instruction to the

registers is directly evaluated within 1 internal CLK Cycle (Typ. 1usec)

If all these blocks are disabled, a write instruction to enable these blocks is delayed by 64 CLK cycles (oscillator

will startup, within max 200usec).

AS3689 Datasheet(PDF) 61 Page - ams-OSRAM AG