参数资料
型号: RFPIC12F675K-E/SS
元件分类: 微控制器/微处理器
英文描述: 8-BIT, FLASH, 20 MHz, RISC MICROCONTROLLER, PDSO20
封装: 0.209 INCH, PLASTIC, MO-150, SSOP-20
文件页数: 54/123页
文件大小: 5438K
代理商: RFPIC12F675K-E/SS
rfPIC12F675
DS70091A-page 34
Preliminary
2003 Microchip Technology Inc.
6.1
Comparator Operation
A single comparator is shown in Figure 6-1, along with
the relationship between the analog input levels and
the digital output. When the analog input at V
IN+ is less
than the analog input V
IN-, the output of the comparator
is a digital low level. When the analog input at V
IN+ is
greater than the analog input V
IN-, the output of the
comparator is a digital high level. The shaded areas of
the output of the comparator in Figure 6-1 represent
the uncertainty due to input offsets and response time.
The polarity of the comparator output can be inverted
by setting the CINV bit (CMCON<4>). Clearing CINV
results in a non-inverted output. A complete table
showing the output state versus input conditions and
the polarity bit is shown in Table 6-1.
TABLE 6-1:
OUTPUT STATE VS. INPUT
CONDITIONS
FIGURE 6-1:
SINGLE COMPARATOR
Note:
To use CIN+ and CIN- pins as analog
inputs, the appropriate bits must be
programmed in the CMCON (19h) register.
Input Conditions
CINV
COUT
V
IN- > VIN+
0
V
IN- < VIN+
0
1
V
IN- > VIN+
1
V
IN- < VIN+
1
0
Output
V
IN-
V
IN+
Output
+
V
IN+
V
IN-
Note:
CINV bit (CMCON<4>) is clear.
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