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參數(shù)資料
| 型號(hào)： | L6460TR |
| 廠商： | STMICROELECTRONICS |
| 元件分類： | 運(yùn)動(dòng)控制電子 |
| 英文描述： | STEPPER MOTOR CONTROLLER, PQFP64 |
| 封裝： | 10 X 10 MM, 1 MM HEIGHT, ROHS COMPLIANT, TQFP-64 |
| 文件頁數(shù)： | 133/139頁 |
| 文件大?。?/td> | 3837K |
| 代理商： | L6460TR |
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L6460
Digital comparator
Doc ID 17713 Rev 1
93/139
21
Digital comparator
L6460 includes one digital comparator that can be used to signal, through serial interface,
that a channel converted by the ADC is greater, greater-equal, lesser, lesser equal, or equal
than a fixed value set by serial interface or than the value converted by the other ADC
channel.
This circuit can be used to monitor the temperature of the IC advising the firmware when it
reaches a certain value decided by the firmware by setting one ADC channel to do
continuous conversions of the temperature sensor.
The circuit operation can be enabled or disabled changing the EnDigCmp bit in the
configuration register DigCmpCfg. By setting the DigCmpUpdate[1:0] bits in the
configuration register, the comparator can be programmed to update its output in one of the
following ways:
●
DigCmpUpdate[1:0]=00
–
Continuously (each clock).
●
DigCmpUpdate[1:0]=01
–
Each time a conversion is performed on ADC channel 0.
●
DigCmpUpdate[1:0]=10
–
Each time a conversion is performed on ADC channel 1.
●
DigCmpUpdate[1:0]=11
–
ADC state machine driven.
When the last option is selected, the digital comparator will update its output in two different
ways depending on the configuration of the ADC converter. If ADC converter is configured to
do continuous conversions on both channels, the output of the comparator will be updated
when the double conversion is completed. If ADC converter is not configured to do
continuous conversions on both channels, the output of the comparator will be updated each
time a conversion is completed.
The comparator output can be digitally filtered so that the programmed condition has to be
found for three consecutive checks before to be signaled.
The Figure 29 shows the block diagram of digital comparator.
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