16-Port I/O Expander with LED Intensity

Control, Interrupt, and Hot-Insertion Protection

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Table 3. Power-Up Configuration

REGISTER DATA

REGISTER FUNCTION

POWER-UP CONDITION

ADDRESS

CODE

(HEX)

D7

D6

D5

D4

D3

D2

D1

D0

Blink phase 0 outputs P7–P0

High-impedance outputs

0x02

1

1

1

1

1

1

1

1

Blink phase 0 outputs P15–P8

High-impedance outputs

0x03

1

1

1

1

1

1

1

1

Ports configuration P7–P0

Ports P7–P0 are inputs

0x06

1

1

1

1

1

1

1

1

Ports configuration P15–P8

Ports P15–P8 are inputs

0x07

1

1

1

1

1

1

1

1

Blink phase 1 outputs P7–P0

High-impedance outputs

0x0A

1

1

1

1

1

1

1

1

Blink phase 1 outputs P15–P8

High-impedance outputs

0x0B

1

1

1

1

1

1

1

1

Master, O16 intensity

PWM oscillator is disabled;

O16 is static logic output

0x0E

0

0

0

0

1

1

1

1

Configuration

INT/O16 is interrupt output;

blink is disabled;

global intensity is enabled

0x0F

0

0

0

0

1

1

0

0

Outputs intensity P1, P0

P1, P0 are static logic outputs

0x10

1

1

1

1

1

1

1

1

Outputs Intensity P3, P2

P3, P2 are static logic outputs

0x11

1

1

1

1

1

1

1

1

Outputs intensity P5, P4

P5, P4 are static logic outputs

0x12

1

1

1

1

1

1

1

1

Outputs intensity P7, P6

P7, P6 are static logic outputs

0x13

1

1

1

1

1

1

1

1

Outputs intensity P9, P8

P9, P8 are static logic outputs

0x14

1

1

1

1

1

1

1

1

Outputs intensity P11, P10

P11, P10 are static logic outputs

0x15

1

1

1

1

1

1

1

1

Outputs intensity P13, P12

P13, P12 are static logic outputs

0x16

1

1

1

1

1

1

1

1

Outputs intensity P15, P14

P15, P14 are static logic outputs

0x17

1

1

1

1

1

1

1

1

Table 4. Configuration Register

REGISTER DATA

REGISTER

ADDRESS

CODE

(HEX)

D7

D6

D5

D4

D3

D2

D1

D0

CONFIGURATION

R/

W

Write device configuration

0

X

Read back device configuration

1

INT

O

O1

O0

I

G

B

E

Disable blink

—

XXXXXXX

0

Enable blink

—

XXXXXXX

1

—

XXXXXX

01

Flip blink register (see text)

—

0x0F

XXXXXX

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