8-Port I/O Expander with LED Intensity

Control, Interrupt, and Hot-Insertion Protection

______________________________________________________________________________________________________

21

Table 13. Master, O8 Intensity Register

REGISTER DATA

REGISTER

ADDRESS

CODE

(HEX)

D7

D6

D5

D4

D3

D2

D1

D0

MSB

LSB

MSB

LSB

MASTER AND GLOBAL INTENSITY

R/

W

MASTER INTENSITY

O8 INTENSITY

Write master and global intensity

0

Read back master and global intensity

1

M3

M2

M1

M0

G3

G2

G1

G0

Master intensity duty cycle is 0/15 (off);

internal oscillator is disabled;

all outputs will be static with no PWM

—

0000

—

—

—

—

Master intensity duty cycle is 1/15

—

0001

—

—

—

—

Master intensity duty cycle is 2/15

—

0010

—

—

—

—

Master intensity duty cycle is 3/15

—

0011

—

—

—

—

—

—

—

————

———

Master intensity duty cycle is 13/15

—

1101

—

—

—

—

Master intensity duty cycle is 14/15

—

1110

—

—

—

—

Master intensity duty cycle is 15/15 (full)

—

1111

—

—

—

—

O8 intensity duty cycle is 1/16

—

—

———

0

0

0

0

O8 intensity duty cycle is 2/16

—

—

———

0

0

0

1

O8 intensity duty cycle is 3/16

—

—

———

0

0

1

0

—

—

—

————

———

O8 intensity duty cycle is 14/16

—

—

———

1

1

0

1

O8 intensity duty cycle is 15/16

—

—

———

1

1

1

0

O8 intensity duty cycle is 16/16

(static output, no PWM)

—

0X0E

—

———

1

1

1

1