AS1163 datasheet(75/91 Pages) AMSOSRAM

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AS1163

Command and register description

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7.13.9

SETSETUP (0x4D)

Write SETUP register.

Payload is 8-bit. No answer (16-bit TEMPSTAT register if SR bit is set).

7.13.10

READPWMCHN (0x4E)

Read PWM register.

Payload is 8-bit to select the LED channel: 0,1, or 2 for PWM; or 3, 4, and 5 for PWM after

temperature correction; or 6, 7, and 8 for driver current.

This command will send back the PWM values of the PWM registers, but also other additional

information if the selected channel is higher than 2:

When the payload is 0 to 2, returns the 48-bit PWM register values of the 3 LED drivers for the

specified channel.

Table 31: Format of READPWMCHN register (payload from 0 to 2)

Addr: 0x4E

READPWMCHN

Bit

Bit name

Default

Access

Bit description

47:32

RED_PWM[15:0]

0x0

This is the value to be used for the PWM cycle of the RED

LED.

If FAST_PWM@SETUP = “0” , 15 bits [15:1] are used to

realize a 15-bit dynamic range, bit 0 is used for automatic

dithering between 2 consecutives PWM frames.

If FAST_PWM@SETUP = “1” , 14 bits [15:2] are used to

realize a 14-bit dynamic range, bit 1 is used for automatic

dithering between 2 consecutives PWM frames.

31:16

GREEN_PWM[15:0]

0x0

This is the value to be used for the PWM cycle of the

GREEN LED.

If FAST_PWM@SETUP = “0”, 15 bits [15:1] are used to

realize a 15-bit dynamic range, bit 0 is used for automatic

dithering between 2 consecutives PWM frames.

If FAST_PWM@SETUP = “1”, 14 bits [15:2] are used to

realize a 14-bit dynamic range, bit 1 is used for automatic

dithering between 2 consecutives PWM frames.

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