stled325 STMicroelectronics, stled325 Datasheet - Page 15

• Manufacturer Part Number: stled325
• Description: I?c Interfaced, Advanced Led Controller/driver With Keyscan, Standby Power Management And Real Time Clock Rtc
• Manufacturer: STMicroelectronics

STLED325
3.10.1
Cold boot up
When power is first applied to the system, the STLED325 is reset. It will then manage the
power to the main board by bringing the STBY pin to a low level.
This wakes up the main processor which asserts the READY pin to a high level to indicate to
STLED325 of a proper boot-up sequence.
If the microprocessor does not assert the READY pin to a high within 10s (default), the
STLED325 cuts off the power to the Host by asserting the STBY pin. The high level on
READY pin signifies that the processor is ready. After this, the processor can configure the
STLED325 by sending the various I
RTC display mapping, hot-keys.
The power-up behavior in 2 conditions is shown in
Doc ID 17576 Rev 1
2
C commands for configuration of display, RC protocol,
Figure
5.
Functional description
15/62