PCU9654 datasheet(7/36 Pages) PHILIPS

Part #	PCU9654

Description	8-bit UFm 5 MHz I2C-bus 100 mA 40 V LED driver

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Manufacturer	PHILIPS [NXP Semiconductors]

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PCU9654

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Product data sheet

Rev. 1 — 2 July 2012

7 of 36

NXP Semiconductors

PCU9654

8-bit UFm 5 MHz I2C-bus 100 mA 40 V LED driver

7.1.2 LED All Call UFm I2C-bus address

• Default power-up value (ALLCALLADR register): E0h or 1110 000

• Programmable through I2C-bus (volatile programming)

• At power-up, LED All Call I2C-bus address is enabled.

See Section 7.3.8 “ALLCALLADR, LED All Call UFm I2C-bus address” for more detail.

Remark: The default LED All Call I2C-bus address (E0h or 1110 000) must not be used as

a regular I2C-bus slave address since this address is enabled at power-up. All the

PCU9654s on the I2C-bus will respond to the address if sent by the I2C-bus master.

7.1.3 LED Sub Call UFm I2C-bus addresses

• 3 different UFm I2C-bus addresses can be used

• Default power-up values:

– SUBADR1 register: E2h or 1110 001

– SUBADR2 register: E4h or 1110 010

– SUBADR3 register: E8h or 1110 100

• Programmable through I2C-bus (volatile programming)

• At power-up, Sub Call I2C-bus addresses are disabled.

See Section 7.3.7 “SUBADR1 to SUBADR3, UFm I2C-bus subaddress 1 to 3” for more

detail.

7.1.4 Software Reset UFm I2C-bus address

The address shown in Figure 4 is used when a reset of the PCU9654 needs to be

performed by the master. The Software Reset address (SWRST Call) must be used with

W =logic0. If W = logic 1, the PCU9654 does not recognize the SWRST. See Section 7.6

“Software reset” for more detail.

Remark: The Software Reset UFm I2C-bus address is a reserved address and cannot be

used as a regular UFm I2C-bus slave address or as an LED All Call or LED Sub Call

address.

Fig 4.

Software Reset address

0

002aag323

0

1

W (write only)

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