參數(shù)資料
型號: PIC16LCR620AT-04I/SO
元件分類: 微控制器/微處理器
英文描述: 8-BIT, MROM, 4 MHz, RISC MICROCONTROLLER, PDSO18
封裝: 0.300 INCH, PLASTIC, MS-013, SO-18
文件頁數(shù): 66/128頁
文件大?。?/td> 3677K
代理商: PIC16LCR620AT-04I/SO
PIC16C62X
DS30235J-page 40
2003 Microchip Technology Inc.
7.4
Comparator Response Time
Response time is the minimum time, after selecting a
new reference voltage or input source, before the
comparator output has a valid level. If the internal
reference is changed, the maximum delay of the
internal voltage reference must be considered when
using the comparator outputs. Otherwise the maximum
delay of the comparators should be used (Table 12-2).
7.5
Comparator Outputs
The comparator outputs are read through the CMCON
register. These bits are read only. The comparator
outputs may also be directly output to the RA3 and RA4
I/O pins. When the CM<2:0> = 110, multiplexors in the
output path of the RA3 and RA4 pins will switch and the
output of each pin will be the unsynchronized output of
the comparator. The uncertainty of each of the
comparators is related to the input offset voltage and the
response time given in the specifications. Figure 7-3
shows the comparator output block diagram.
The TRISA bits will still function as an output enable/
disable for the RA3 and RA4 pins while in this mode.
FIGURE 7-3:
COMPARATOR OUTPUT BLOCK DIAGRAM
Note 1: When reading the PORT register, all pins
configured as analog inputs will read as a
‘0’. Pins configured as digital inputs will
convert an analog input according to the
Schmitt Trigger input specification.
2: Analog levels on any pin that is defined as
a digital input may cause the input buffer
to
consume
more
current
than
is
specified.
D
Q
EN
To RA3 or
RA4 Pin
Bus
Data
RD CMCON
Set
MULTIPLEX
CMIF
Bit
-
+
D
Q
EN
CL
P
ORT PINS
RD CMCON
NRESET
F
ROM
O
THER
C
OMPARATOR
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