AS3676 datasheet(34/92 Pages) AMSCO

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AS3676

Datasheet - D e ta i l e d D e s c r i p t i o n

8.4.4

Current Sinks RGB1, RGB2, RGB3

These current sinks have a resolution of 8 bits and can sink up to 38.25mA.

RGB Current Sinks Registers

Table 40. Current Sinks RGB1, RGB2, RGB3 Parameters

Symbol

Parameter

Condition

Min

Typ

Max

Unit

IBIT7

Current sink if Bit7 = 1

For V(RGBx) > 0.2V

19.2

IBIT6

Current sink if Bit6 = 1

9.6

IBIT5

Current sink if Bit5 = 1

4.8

IBIT4

Current sink if Bit4 = 1

2.4

IBIT3

Current sink if Bit3 = 1

1.2

IBIT2

Current sink if Bit2 = 1

0.6

IBIT1

Current sink if Bit1 = 1

0.3

IBIT0

Current sink if Bit0 = 1

0.15

m

1. Variation between currents within this group

matching Accuracy

RGB1, RGB2, RGB3

IBIT7 and IBIT6

-5

all other bits

-10

+10





2. Variation between the programmed current and the actual current

absolute Accuracy

-15

+15

VRGBX

Voltage compliance

0.2

CPO

Table 41. curr rgb control

Addr: 02h

curr rgb control

This register select the mode of the current sinks RGB1, RGB2, RGB3

Bit

Bit Name

Default Access

Description

1:0

rgb1_mode

0R/W

Select the mode of the current sink RGB1

00b

off

01b

10b

PWM controlled

11b

LED pattern controlled

3:2

rgb2_mode

0R/W

Select the mode of the current sink RGB2

00b

off

01b

10b

PWM controlled

11b

LED pattern controlled

5:4

rgb3_mode

0R/W

Select the mode of the current sink RGB3

00b

off

01b

10b

PWM controlled

11b

LED pattern controlled

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