參數(shù)資料
型號(hào): 16F630
廠商: Microchip Technology Inc.
英文描述: 14-Pin FLASH-Based 8-Bit CMOS Microcontrollers
中文描述: 14引腳基于閃存的8位CMOS微控制器
文件頁數(shù): 40/132頁
文件大?。?/td> 2651K
代理商: 16F630
PIC16F630/676
DS40039C-page 38
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
- > V
IN
+
0
0
V
IN
- < V
IN
+
0
1
V
IN
- > V
IN
+
1
1
V
IN
- < V
IN
+
1
0
Output
V
IN
-
V
IN
+
Output
+
V
IN
+
V
IN
-
Note:
CINV bit (CMCON<4>) is clear.
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