Datasheet

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SLAS412− DECEMBER 2003
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REGISTER 02H: Reserved
BIT NAME
READ/
WRITE
RESET
VALUE
FUNCTION
D15−D0 R FFFFH Reserved
REGISTER 03H: Reference Control
BIT NAME
READ/
WRITE
RESET
VALUE
FUNCTION
D15−D5 R 000H Reserved
D4 VREFM R/W 0 Voltage Reference Mode. This bit configures the VREF pin as either external reference or internal
reference.
0 => External reference
1 => Internal reference
D3−D2 RPWUDL R/W 00 Reference Power Up Delay. These bits allow a delay time for measurements to be made after the
reference powers up, thereby ensuring that the reference has settled
00 => 0 µs
01 => 100 µs
10 => 500 µs
11 => 1000 µs
Note: This is valid only when the device is programmed for internal reference and bit D1 = 1, i.e.,
reference is powered down between the conversions if not required.
D1 RPWDN R/W 1 Reference Power Down. This bit controls the power down of the internal reference voltage.
0 => Powered up at all times.
1 => Powered down between conversions.
Note: when D4 = 0, i.e., device is in external reference mode, then the internal reference is powered
down always.
D0 IREFV R/W 0 Internal Reference Voltage. This bit selects the internal voltage reference level for the TSC ADC.
0 => VREF = 1.25 V
1 => VREF = 2.50 V
REGISTER 04H: Reset Control
BIT NAME
READ/
WRITE
RESET
VALUE
FUNCTION
D15−D0 RSALL R/W FFFFH Reset All. Writing the code 0xBB00, as shown below, to this register causes the ’AIC26 to reset all
its registers to their default, power−up values.
1011101100000000 => Reset all registers
Others => Do not write other sequences to this register.
REGISTER 05H: Reserved
BIT NAME
READ/
WRITE
RESET
VALUE
FUNCTION
D15−D0 R 0000H Reserved