16-Port I/O Expander with LED Intensity

Control, Interrupt, and Hot-Insertion Protection

22

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Table 14. Output Intensity Registers

REGISTER DATA

REGISTER

ADDRESS

CODE

(HEX)

D7

D6

D5

D4

D3

D2

D1

D0

MSB

LSB

MSB

LSB

OUTPUTS P1, P0 INTENSITY

R/

W

OUTPUT P1 INTENSITY

OUTPUT P0 INTENSITY

Write output P1, P0 intensity

0

Read back output P1, P0 intensity

1

P1I3

P1I2

P1I1

P1I0

P0I3

P0I2

P0I1

P0I0

Output P1 intensity duty cycle is 1/16

—

0000

—

—

—

—

Output P1 intensity duty cycle is 2/16

—

0001

—

—

—

—

Output P1 intensity duty cycle is 3/16

—

0010

—

—

—

—

—

—

————

—

———

Output P1 intensity duty cycle is 14/16

—

1101

—

—

—

—

Output P1 intensity duty cycle is 15/16

—

1110

—

—

—

—

Output P1 intensity duty cycle is 16/16

(static logic level, no PWM)

—

1111

—

—

—

—

Output P0 intensity duty cycle is 1/16

—

————

0

0

0

0

Output P0 intensity duty cycle is 2/16

—

————

0

0

0

1

Output P0 intensity duty cycle is 3/16

—

————

0

0

1

0

—

—

————

—

———

Output P0 intensity duty cycle is 14/16

—

————

1

1

0

1

Output P0 intensity duty cycle is 15/16

—

————

1

1

1

0

Output P0 intensity duty cycle is 16/16

(static logic level, no PWM)

—

0X10

————

1

1

1

1

MSB

LSB

MSB

LSB

OUTPUTS P3, P2 INTENSITY

OUTPUT P3 INTENSITY

OUTPUT P2 INTENSITY

Write output P3, P2 intensity

0

Read back output P3, P2 intensity

1

0x11

P3I3

P3I2

P3I1

P3I0

P2I3

P2I2

P2I1

P2I0

MSB

LSB

MSB

LSB

OUTPUTS P5, P4 INTENSITY

OUTPUT P5 INTENSITY

OUTPUT P4 INTENSITY

Write output P5, P4 intensity

0

Read back output P5, P4 intensity

1

0x12

P5I3

P5I2

P5I1

P5I0

P4I3

P4I2

P4I1

P4I0

MSB

LSB

MSB

LSB

OUTPUTS P7, P6 INTENSITY

OUTPUT P7 INTENSITY

OUTPUT P6 INTENSITY

Write output P7, P6 intensity

0

Read back output P7, P6 intensity

1

0x13

P7I3

P7I2

P7I1

P7I0

P6I3

P6I2

P6I1

P6I0