Texas Instruments TMS320F2837 D Series Errata Sheet

www.ti.com Usage Notes and Known Design Exceptions to Functional Specifications
9
SPRZ412K–December 2013–Revised February 2020
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Copyright © 2013–2020, Texas Instruments Incorporated
TMS320F2837xD Dual-Core MCUs Silicon Revisions C, B, A, 0
Advisory Analog Trim of Some TMX Devices
Revision(s) Affected 0, A, B
Details Some TMX samples may not have analog trims programmed. This could degrade the
performance of the ADC, buffered DAC, and internal oscillators. A value of all zeros in
these trim registers due to lack of trim will have the following impact.
TRIM REGISTER IMPACT OF UNTRIMMED REGISTER
ADC reference AnalogSubsysRegs.ANAREFTRIMA Degraded performance of the ADC for all
specifications.
AnalogSubsysRegs.ANAREFTRIMB
AnalogSubsysRegs.ANAREFTRIMC
AnalogSubsysRegs.ANAREFTRIMD
ADC linearity AdcaRegs.ADCINLTRIM1-6 Degraded INL and DNL specifications of the ADC
in 16-bit mode. No workaround available.
AdcbRegs.ADCINLTRIM1-6
AdccRegs.ADCINLTRIM1-6
AdcdRegs.ADCINLTRIM1-6
ADC offset AdcaRegs.ADCOFFTRIM Degraded performance of the ADC offset error
specification.
AdcbRegs.ADCOFFTRIM
AdccRegs.ADCOFFTRIM
AdcdRegs.ADCOFFTRIM
Internal oscillator AnalogSubsysRegs.INTOSC1TRIM Degraded frequency accuracy and temperature
drift of the internal oscillators.
AnalogSubsysRegs.INTOSC2TRIM
Buffered DAC offset DacaRegs.DACTRIM Degraded offset error specification of the buffered
DAC. No workaround available.
DacbRegs.DACTRIM
DaccRegs.DACTRIM
Workaround(s) The following workarounds can be used for improved performance, though it still may not
meet data sheet specifications.
To determine if a device is TMX in software, check the status of the PARTIDL[QUAL]. If
this field is 0, the device is TMX. PARTIDL[QUAL] can be read via the function call
SysCtl_getDeviceParametric(SYSCTL_DEVICE_QUAL). This check is implemented in
the Device_init() function, which will then call the Device_configureTMXAnalogTrim()
function if needed. The user can place any additional self-calibration or static calibration
code in the Device_configureTMXAnalogTrim() function.
If the ADC reference trim registers contain all zeros, write the static reference trim value
of 0x7BDD to the reference trim register for all ADCs.
Missing ADC offset trim can be generated by following the instructions in the “ADC
Zero Offset Calibration” section of the TMS320F2837xD Dual-Core Microcontrollers
Technical Reference Manual.
If the internal oscillator trim contains all zeros, the user can adjust the lowest 10 bits of
the oscillator trim register between 1 (minimum) and 1023 (maximum) while observing
the system clock on the XCLOCKOUT pin.

Texas Instruments TMS320F2837 D Series Specifications

General

Brand	Texas Instruments
Model	TMS320F2837 D Series
Category	Microcontrollers
Language	English