MSP430F249-EP_14 Datasheet, PDF (14/82 Pages) Texas Instruments – MIXED SIGNAL MICROCONTROLLER

MSP430F249-EP
MIXED SIGNAL MICROCONTROLLER
2008
calibration data stored in information memory segment A
Calibration data is stored for the DCO and for the ADC12. It is organized in a tag−length−value (TLV) structure.
NAME
TAG_DCO_30
TAG_ADC12_1
TAG_EMPTY
TAGS USED BY THE ADC CALIBRATION TAGS
ADDRESS VALUE
DESCRIPTION
0x10F6
0x10DA
0x01
0x10
DCO frequency calibration at VCC = 3 V and T_A = 255C at calibration
ADC12_1 calibration tag
−
0xFE Identifier for empty memory areas
LABELS USED BY THE ADC CALIBRATION TAGS
LABEL
CONDITION AT CALIBRATION / DESCRIPTION
CAL_ADC_25T85
CAL_ADC_25T30
CAL_ADC_25VREF_FACTOR
CAL_ADC_15T85
CAL_ADC_15T30
CAL_ADC_15VREF_FACTOR
CAL_ADC_OFFSET
CAL_ADC_GAIN_FACTOR
CAL_BC1_1MHz
INCHx = 0x1010; REF2_5 = 1, T_A = 1255C
INCHx = 0x1010; REF2_5 = 1, T_A = 305C
REF2_5 = 1, T_A = 305C, I_VREF+ = 1.0 mA
INCHx = 0x1010; REF2_5 = 0, T_A = 1255C
INCHx = 0x1010; REF2_5 = 0, T_A = 305C
REF2_5 = 0, T_A = 305C, I_VREF+ = 0.5 mA
External Vref = 1.5 V, f_ADC12CLK = 5 MHz
External Vref = 1.5 V, f_ADC12CLK = 5 MHz
−
CAL_DCO_1MHz −
CAL_BC1_8MHz −
CAL_DCO_8MHz −
CAL_BC1_12MHz −
CAL_DCO_12MHz −
CAL_BC1_16MHz −
CAL_DCO_16MHz −
SIZE
word
word
word
word
word
word
word
word
byte
byte
byte
byte
byte
byte
byte
byte
ADDRESS OFFSET
0x000E
0x000C
0x000A
0x0008
0x0006
0x0004
0x0002
0x0000
0x0007
0x0006
0x0005
0x0004
0x0003
0x0002
0x0001
0x0000
brownout, supply voltage supervisor
The brownout circuit is implemented to provide the proper internal reset signal to the device during power on
and power off. The supply voltage supervisor (SVS) circuitry detects if the supply voltage drops below a
user-selectable level and supports both supply voltage supervision (the device is automatically reset) and
supply voltage monitoring (SVM, the device is not automatically reset).
The CPU begins code execution after the brownout circuit releases the device reset. However, V_CC may not
have ramped to V_CC(min) at that time. The user must ensure that the default DCO settings are not changed until
V_CC reaches V_CC(min). If desired, the SVS circuit can be used to determine when V_CC reaches V_CC(min).
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