STLED325 datasheet(45/62 Pages) STMICROELECTRONICS

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STLED325

Commands

Doc ID 17576 Rev 1

45/62

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.

STLED325 Datasheet(PDF) 45 Page - STMicroelectronics