參數(shù)資料
型號: PIC16F676-E/SL
元件分類: 微控制器/微處理器
英文描述: 8-BIT, FLASH, 20 MHz, RISC MICROCONTROLLER, PDSO14
封裝: 3.90 MM, LEAD FREE, PLASTIC, SOIC-14
文件頁數(shù): 68/132頁
文件大小: 1344K
代理商: PIC16F676-E/SL
PIC16F630/676
DS40039F-page 40
2010 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 VIN+ is less
than the analog input VIN-, the output of the comparator
is a digital low level. When the analog input at VIN+ is
greater than the analog input VIN-, 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
VIN- > VIN+
00
VIN- < VIN+
01
VIN- > VIN+
11
VIN- < VIN+
10
Output
VIN-
VIN+
Output
+
VIN+
VIN-
Note:
CINV bit (CMCON<4>) is clear.
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