PCA9633DP2 datasheet(15/43 Pages) NXP

15 / 43 page

PCA9633_5

Product data sheet

Rev. 05 — 25 July 2008

15 of 43

NXP Semiconductors

PCA9633

4-bit Fm+ I2C-bus LED driver

7.3.7 I2C-bus subaddress 1 to 3, SUBADRx

Subaddresses are programmable through the I2C-bus. Default power-up values are E2h,

E4h, E8h, and the device(s) will not acknowledge these addresses right after power-up

(the corresponding SUBx bit in MODE1 register is equal to 0).

Once subaddresses have been programmed to their right values, SUBx bits need to be

set to 1 in order to have the device acknowledging these addresses (MODE1 register).

Only the 7 MSBs representing the I2C-bus subaddress are valid. The LSB in SUBADRx

When SUBx is set to 1, the corresponding I2C-bus subaddress can be used during either

an I2C-bus read or write sequence.

7.3.8 LED All Call I2C-bus address, ALLCALLADR

The LED All Call I2C-bus address allows all the PCA9633s in the bus to be programmed

at the same time (ALLCALL bit in register MODE1 must be equal to 1, power-up default

state). This address is programmable through the I2C-bus and can be used during either

an I2C-bus read or write sequence. The register address can be programmed as a

sub call.

Only the 7 MSBs representing the All Call I2C-bus address are valid. The LSB in

ALLCALLADR register is a Read-only bit (0).

If ALLCALL bit = 0, the device does not acknowledge the address programmed in register

ALLCALLADR.

Table 14.

SUBADR1 to SUBADR3 - I2C-bus subaddress registers 0 to 3 (address 09h to

0Bh) bit description

Legend: * default value.

Address

Bit

Symbol

Access

Value

Description

09h

SUBADR1

7:1

A1[7:1]

R/W

1110 001*

I2C-bus subaddress 1

A1[0]

R only

reserved

0Ah

SUBADR2

7:1

A2[7:1]

R/W

1110 010*

I2C-bus subaddress 2

A2[0]

R only

reserved

0Bh

SUBADR3

7:1

A3[7:1]

R/W

1110 100*

I2C-bus subaddress 3

A3[0]

R only

reserved

Table 15.

ALLCALLADR - LED All Call I2C-bus address register (address 0Ch) bit

description

Legend: * default value.

Address

Bit

Symbol

Access

Value

Description

0Ch

ALLCALLADR

7:1

AC[7:1]

R/W

1110 000*

ALLCALL I2C-bus

address register

AC[0]

R only

reserved

PCA9633DP2 датащи(PDF) 15 Page - NXP Semiconductors

PCA9633DP2 датащи(HTML) 15 Page - NXP Semiconductors

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43

датащи скачать

ссылки URL