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PCU9654 Datasheet(PDF) 7 Page - NXP Semiconductors |
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PCU9654 Datasheet(HTML) 7 Page - NXP Semiconductors |
7 / 36 page PCU9654 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2012. All rights reserved. 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 0 0 0 0 1 1 W (write only) |
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