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C8051F560-IQ Datasheet(PDF) 3 Page - Silicon Laboratories

Part # C8051F560-IQ
Description  This note already existed in the data sheet in the Reset Sources chapter, and it?셲 been added to additional locations to make it more prominent.
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Manufacturer  SILABS [Silicon Laboratories]
Direct Link  http://www.silabs.com
Logo SILABS - Silicon Laboratories

C8051F560-IQ Datasheet(HTML) 3 Page - Silicon Laboratories

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Bulletin #1409081
_____________________________________________________________________________________________________
W7206F2 Silicon Labs Bulletin rev I
The information contained in this document is PROPRIETARY to Silicon Laboratories, Inc. and shall not be reproduced or used in
part or whole without Silicon Laboratories’ written consent. The document is uncontrolled if printed or electronically saved. Pg 5
– Added a note regarding programming at cold temperatures on –I devices to “Programming The Flash
Memory” on page 125 and added Temperature during Programming Operations specification to Table
5.5, “Flash Electrical Characteristics,” on page 41.
This specification was previously documented in the errata and has now been moved to the data sheet.
It has been removed from the errata.
For –I (Industrial Grade) parts, parts programmed at a cold temperature below 0 °C may exhibit weakly
programmed flash memory bits. If programmed at 0 °C or higher, there is no problem reading Flash
across the entire temperature range of -40 °C to 125 °C. This temperature restriction does not apply
to –A (Automotive Grade) devices.
VREF pin cannot operate as open-drain when VDD selected as reference source
– Added a note regarding P0.0/VREF when VDD is used as the reference to Table 19.1, “Port I/O
Assignment for Analog Functions,” on page 172 and to the description of the REFSL bit in REF0CN (SFR
Definition 7.1).
This issue was previously documented in the errata and has now been moved to the data sheet. It has
been removed from the errata.
If VDD is selected as the voltage reference in the REF0CN register and the ADC is enabled in the
ADC0CN register, the P0.0/VREF pin cannot operate as a general purpose I/O pin in open-drain
mode. With the above settings, this pin can operate in push-pull output mode or as an analog input.
GPIO may have indeterminate state for fast VIO ramp
– Added a note regarding a potential unknown state on GPIO during power up if VIO ramps significantly
before VDD to “Port Input/Output” on page 170 and “Reset Sources” on page 139.
Note: When VIO rises faster than VDD, which can happen when VREGIN and VIO are tied together, a
delay created between GPIO power (VIO) and the logic controlling GPIO (VDD) results in a temporary
unknown state at the GPIO pins. When VIO rises faster than VDD, the GPIO may enter the following
states: floating, glitch low, or glitch high. Cross coupling VIO and VDD with a 4.7 μF capacitor
mitigates the root cause of the problem by allowing VIO and VDD to rise at the same rate.
Set FLEWT bit before writing or erasing flash
– Added steps to set the FLEWT bit in the FLSCL register (SFR Definition 14.3) in the flash write/erase
procedures in “Flash Erase Procedure” on page 126, “Flash Write Procedure” on page 126, and “Flash
Write Optimization” on page 127.
This requirement was previously documented in the bit description for the FLEWT bit, and it’s been
added to the procedures to make it more prominent.
FLEWT Flash Erase Write Time Control.
This bit should be set to 1b before Writing or Erasing Flash.
0: Short Flash Erase / Write Timing.
1: Extended Flash Erase / Write Timing.
VDD monitor may trigger on fast VDD changes


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