aduc7030 Analog Devices, Inc., aduc7030 Datasheet - Page 61

• Manufacturer Part Number: aduc7030
• Description: Integrated Precision Battery Sensor For Automotive
• Manufacturer: Analog Devices, Inc.

Preliminary Technical Data
ADC Configuration Register:
Name:
Address:
Default Value:
Access:
Function:
Table 35. ADCCFG MMR Bit Designations
Bit
7
6, 5
4, 3
2
1
0
Description
Analog Ground Switch Enable
This bit is set to ‘1’ by user software to connect the external GND_SW pin (pin#15) to an internal analog ground reference point.
This bit can be used to connect and disconnect external circuits and components to ground under program control and thereby
minimize dc current consumption when the external circuit or component is not being used.
This bit is used in conjunction with ADCMDE[6] to select a 20K: resistor to ground.
Current Channel (32-bit) Accumulator Enable
0, 0
0, 1
1, 0
1, 1
Current Channel ADC Comparator Enable
0, 0
0, 1
1, 0
1, 1
Current Channel ADC Over Range Enable
Set by user to enable a ‘coarse’ comparator on the Current Channel ADC. If the current reading is grossly (>30% approx.) over-
ranged for the active gain setting, then the over range bit in the ADCSTA MMR is set. The current must be outside this range for
greater than 125µsecs for the flag to be set.
This feature should not be used in ADC Low Power Mode
Not Used
This bit is reserved for future functionality and be written as 0 by user code
Current Channel ADC, Result Counter Enable
Set by user to enable the result count mode. In this mode an I-ADC interrupt will only be generated when ADC0RCV=ADC0RCL.
This allows the I-ADC to continuously monitor current but only interrupt the MCU core after a defined number of conversions.
The Voltage/Temperature ADC will also continue to convert if enabled but again only the last conversion result will be available
(intermediate V/T-ADC conversion results are not stored) when the ADC counter interrupt occurs
ADCCFG
0xFFFF051C
0x00
Read/Write
The 8-bit ADC Configuration MMR controls extended functionality related to the on-chip ADCs.
Accumulator Disabled and reset to 0
Accumulator Active
Positive current values are added to accumulator total, accumulator can overflow if allowed run for > 65535
conversions
Negative current values are subtracted from accumulator total, accumulator is clamped to a minimum value of 0
Accumulator Active
Positive current values are added to accumulator total, accumulator can overflow if allowed run for > 65535
conversions
The absolute values of Negative current are subtracted from accumulator total, accumulator in this mode will
continue to accumulate negatively, below 0
Not Defined.
Comparator Disabled
Comparator Active, Interrupt asserted if absolute value of I-ADC conversion result |I| >= ADC0TH
Comparator-Count Mode Active, Interrupt asserted if absolute value of an I-ADC conversion result |I| >= ADC0TH for
#ADC0TCL conversions. A conversion value |I| < ADC0TH will reset the threshold counter value (ADC0THV) to 0
Comparator-Count Mode Active, Interrupt asserted if absolute value of an I-ADC conversion result |I| >= ADC0TH for
#ADC0TCL conversions. A conversion value |I| < ADC0TH will decrement the threshold counter value (ADC0THV)
towards 0.
Rev. PrE | Page 61 of 150
ADuC7030/ADuC7033