ADC121C021CIMKX NSC [National Semiconductor], ADC121C021CIMKX Datasheet - Page 19

• Manufacturer Part Number: ADC121C021CIMKX
• Description: I2C-Compatible, 12-Bit Analog-to-Digital Converter (ADC) with Alert Function
• Manufacturer: NSC [National Semiconductor]

1.6.7 V
Pointer Address 05h (Read/Write)
Default Value: 0000h
1.6.8 V
Pointer Address 06h (Read/Write)
Default Value: 0FFFh
1.6.9 V
Pointer Address 07h (Read/Write)
Default Value: 0000h
Bits
15:12
11:0
Bits
15:12
11:0
Bits
15:12
11:0
D15
D15
D15
D7
D7
D7
HYST
MIN
MAX
Name
Reserved
Hysteresis
Name
Reserved
Lowest Conversion
Name
Reserved
Highest Conversion
-- Lowest Conversion Register
-- Highest Conversion Register
-- Alert Hysteresis Register
D14
D14
D14
D6
D6
D6
Reserved
Reserved
Reserved
Description
Always reads zeros. Zeros must be written to these bits.
Sets the hysteresis value used to determine the alert condition. After a V
the conversion result must move within the V
the alert condition.
Note: If the Alert Hold bit is set in the configuration register, alert conditions will not self-clear.
Description
Always reads zeros. Zeros must be written to these bits.
Contains the Lowest Conversion result. Each conversion result is compared against the contents
of this register. If the value is lower, it becomes the lowest conversion and replaces the current
value. If the value is higher, the register contents remain unchanged. The lowest conversion value
can be cleared at any time by writting 0FFFh to this register. The value of this register will update
automatically when the automatic conversion mode is enabled.
Description
Always reads zeros. Zeros must be written to these bits.
Contains the Highest Conversion result. Each conversion result is compared against the contents
of this register. If the value is higher, it becomes the highest conversion and replaces the previous
value. If the value is lower, the register contents remain unchanged. The highest conversion value
can be cleared at any time by writting 0000h to this register. The value of this register will update
automatically when the automatic conversion mode is enabled.
D13
D13
D13
D5
D5
D5
Highest Conversion[7:0]
Lowest Conversion[7:0]
D12
D12
D12
D4
D4
D4
Hysteresis[7:0]
19
D11
D11
D11
D3
D3
D3
HIGH
or V
Highest Conversion[11:8]
Lowest Conversion[11:8]
D10
D10
D10
LOW
D2
D2
D2
Hysteresis[11:8]
limit by more than this value to clear
D9
D1
D9
D1
D9
D1
HIGH
or V
LOW
alert occurs,
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D8
D0
D8
D0
D8
D0