stled325 STMicroelectronics, stled325 Datasheet - Page 45

• 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
Commands
b3 = 0 enables the GPIO0 as input
b3 = 1 enables the GPIO0 as output
b4: configuration for the GPIO1
b4 = 0 enables the GPIO1 as input
b4 = 1 enables the GPIO1 as output
b5 = interrupt enable register bit for GPIO (applies to both GPIO0 and GPIO1)
b5 = 0 disables the interrupt generation from any of the two GPIOs
b5 = 1 enables the interrupt generation from any of the two GPIOs inputs change
b6 = configuration of the edge trigger for GPIO0 (works only when b5 is enabled)
b6 = 0 sends interrupt when GPIO0 triggers from a high to a low
b6 = 1 sends interrupt when GPIO0 triggers from a low to a high
b7 = configuration of the edge trigger for GPIO1 (works only when b5 is enabled)
b7 = 0 sends interrupt when GPIO1 triggers from a high to a low
b7 = 1 sends interrupt when GPIO1 triggers from a low to a high
The minimum pulse width for a valid GPIO detection must be 8us minimum.
Upon power application, the following modes are selected:
Display mode setting: the 4-digit, 8-segment mode is selected (default: display off and
keyscan on).
Remote control protocol setting: RC-5.
Guard timer setting: turned on with 10s. After the first command is processed by STLED325,
the guard timer is turned off until it is turned on by the host.
Guard timer action: Issue Standby.
Doc ID 17576 Rev 1
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