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KTZ8866

January 2022 - Revision 04b

Page 28 of 37

Company Confidential

Table 9. BL_BRT_LSB Register

ADDRESS

MODE

RESET VALUE: 0x07

0x04

R/W

BIT

NAME

POR

DESCRIPTION

7:3

RSVD

00000

2:0

BRT[2:0]

111

3-bit brightness code LSBs

Table 10. BL_BRT_MSB Register

ADDRESS

MODE

RESET VALUE: 0xFF

0x05

R/W

BIT

NAME

POR

DESCRIPTION

7:0

BRT[7:0]

11111111

11-bit brightness code MSBs

Note:

1.

If only using 8-bit current ratio, keep the 3-

bit LSBs as ‘111’ and only program the 8-bit MSBs.

2.

If using 11-bit current ratio, the 3-bit LSBs should be programmed first, then the 8-bit MSBs can be programmed to take effect. Even if only the 3-bit LSBs

need to be changed, the 8-bit MSB should always be programmed to make the 3-bit LSBs change taking effect.

3.

For 11-

bit program code 11’b00000000000, both boost converter and current sinks are turned off.

Table 11. BL_EN Register

ADDRESS

MODE

RESET VALUE: 0x3F

0x08

R/W

BIT

NAME

POR

DESCRIPTION

7

SOFTWARE_RESET

0

0 = No reset (Default)

1 = Device reset (automatically returns to 0 after reset)

6

BL_EN

0

0 = BL disabled (Default)

1 = BL enabled

5

LED6_EN

1

0 = Current sink 6 disabled

1 = Current sink 6 enabled (Default)

4

LED5_EN

1

0 = Current sink 5 disabled

1 = Current sink 5 enabled (Default)

3

LED4_EN

1

0 = Current sink 4 disabled

1 = Current sink 4 enabled (Default)

2

LED3_EN

1

0 = Current sink 3 disabled

1 = Current sink 3 enabled (Default)

1

LED2_EN

1

0 = Current sink 2 disabled

1 = Current sink 2 enabled (Default)

0

LED1_EN

1

0 = Current sink 1 disabled

1 = Current sink 1 enabled (Default)

Note: Writing software reset bit to ‘1’ will reset all I2C registers to their default values, then this bit will be internally reset back to ‘0’.