adc121c021eb National Semiconductor Corporation, adc121c021eb Datasheet - Page 16
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adc121c021eb
Manufacturer Part Number
adc121c021eb
Description
Adc121c021/adc121c027 I2c-compatible, 12-bit Analog-to-digital Converter With Alert
Manufacturer
National Semiconductor Corporation
Datasheet
1.ADC121C021EB.pdf
(30 pages)
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1.6.1 Address Pointer Register
The address pointer determines which of the data registers is
accessed by the I
write operation is stored in the address pointer register. This
value selects the register that the following data bytes will be
written to or read from. Only the three LSBs of this register
are variable. The other bits must always be written to as zeros.
After a power-on reset, the pointer register defaults to all ze-
ros (conversion result register).
Default Value: 00h
P7
0
P6
0
P5
0
2
C interface. The first data byte of every
P4
0
P3
0
P2
Register Select
P1
FIGURE 6. Register Structure
P0
16
P2
0
0
0
0
1
1
1
1
P1
0
0
1
1
0
0
1
1
P0
0
1
0
1
0
1
0
1
30020969
Highest Conversion (read/write)
Lowest Conversion (read/write)
Conversion Result (read only)
Configuration (read/write)
Alert Status (read/write)
Hysteresis (read/write)
High Limit (read/write)
Low Limit (read/write)
REGISTER
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