參數(shù)資料
型號(hào): AT89S52-24PI
廠商: Atmel
文件頁(yè)數(shù): 31/37頁(yè)
文件大?。?/td> 0K
描述: IC MCU 8K FLASH 24MHZ 40-DIP
標(biāo)準(zhǔn)包裝: 9
系列: 89S
核心處理器: 8051
芯體尺寸: 8-位
速度: 24MHz
連通性: UART/USART
外圍設(shè)備: WDT
輸入/輸出數(shù): 32
程序存儲(chǔ)器容量: 8KB(8K x 8)
程序存儲(chǔ)器類型: 閃存
RAM 容量: 256 x 8
電壓 - 電源 (Vcc/Vdd): 4 V ~ 5.5 V
振蕩器型: 內(nèi)部
工作溫度: -40°C ~ 85°C
封裝/外殼: 40-DIP(0.600",15.24mm)
包裝: 管件
PIC12F629/675
DS41190G-page 38
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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