June 29, 2009 Si4030 Errata (Rev. A0) Errata Status Summary Errata # Title Impact Status 1 TX Current Consumption. Major Increased current consumption at +13 dBm, other power levels unaffected. 2 Some non-standard frequencies are not supported. Major Will be fixed in the next revision. 3 Radio does not return to the low power state when in Auto TX mode. Minor Will be fixed in the next revision. 4 Potential modem failure with default settings. Minor Will be fixed in the next revision. 5 Default register settings for optimal current consumption. Minor Will be fixed in the next revision. 6 Register modification required for TX data-rates greater than 100 kbps. Informational Will update data sheet to reflect operation. 7 Wake Up Timer and Low Duty Cycle mode not functional. Minor Use the micro or 32 kHz option for these functions. Will be fixed in the next revision. Impact Definition: Each erratum is marked with an impact, as defined below: • Minor: Workaround exists. • Major: Errata that do not conform to the data sheet or standard. • Information: The device behavior is acceptable the data sheet will be changed to match the device behavior. 400 West Cesar Chavez, Austin, TX 78701 (512) 416-8500 FAX (512) 416-9669 www.silabs.com Si4030A0ER062909 Errata Details 1. Description: The TX current consumption at +13 dBm does not meet specification; lower power settings are within specification. Impact: May impact battery life. The +13 dBm current consumption is at 34 mA versus the data sheet specification of 28 mA. Workaround: No workaround exists in the current silicon for +13 dBm; lower power levels are unaffected. Resolution: Will be fixed in the next revision. 2. Description: Some non-standard frequencies are not supported. Impacts: Operation in frequencies between 240-280 MHz and 480-560 MHz should be avoided. Workaround: These are non-standard bands and should result in no customer impact; no workaround at this time . Resolution: Will be fixed in the next revision. 3. Description: Radio does not return to the low power state when in Auto TX mode. Impacts: When using Auto TX mode, the radio will not return to the low power state when the TX FIFO reaches the empty state. Workaround: The FIFO underflow interrupt can be enabled allowing the external MCU to wake up when the TX FIFO is empty and put the radio into the low power state: Program register 05h bit 7(enfferr = 1). Resolution: Will be fixed in the next revision. 400 West Cesar Chavez, Austin, TX 78701 (512) 416-8500 FAX (512) 416-9669 www.silabs.com 4. Description: Potential modem failure in receive mode with default settings. Impacts: Under strong blocker conditions, the modem can fail unless the listed workaround is followed. Workaround: Operate the radio with AFC enabled: Program register 56h to C1h. Resolution: Will be fixed in the next revision. 5. Description: Default register settings for optimal current consumption. Impacts: Current consumption. Workaround: Program register 57h bits 2:0 (cdcurr[2:0] = 001), register 59 bit 6 (fbdivhc = 0), register 5Ah bits 1:0 (vcocur[1:0] = 01). Resolution: Will be fixed in the next revision. 6. Description: Register modification required for TX data-rates greater than 100 kbps. Impacts: Eye closure and phase noise. Workaround: Program register 58h bits 7:6 (cpcurr[1:0] = 11). Resolution: Will update data sheet to reflect operation. 7. Description: Wake-up Timer and Low Duty Cycle Modes not functional. Impacts: These features are not supported. Workaround: Use the external microcontroller or the 32 kHz XTAL option on the Si4432 to implement these functions. Resolution: Will be fixed in the next revision. 8. Description: When using the wake-up-timer (WUT) the 32K RC or 32KXTAL must be enabled prior to the wake up timer. Impacts: The initial wake-up-timer period will be wrong without doing this. Workaround: Enable the 32k RC 3 ms before the WUT or if the 32K XTAL is being used it needs to be enabled 6 sec before WUT to ensure it is started up correctly. Resolution: Will be fixed in the next revision. 400 West Cesar Chavez, Austin, TX 78701 (512) 416-8500 FAX (512) 416-9669 www.silabs.com