参数资料
型号: AT89S52-24JI
厂商: Atmel
文件页数: 31/37页
文件大小: 0K
描述: IC MCU 8K FLASH 24MHZ 44-PLCC
标准包装: 27
系列: 89S
核心处理器: 8051
芯体尺寸: 8-位
速度: 24MHz
连通性: UART/USART
外围设备: WDT
输入/输出数: 32
程序存储器容量: 8KB(8K x 8)
程序存储器类型: 闪存
RAM 容量: 256 x 8
电压 - 电源 (Vcc/Vdd): 4 V ~ 5.5 V
振荡器型: 内部
工作温度: -40°C ~ 85°C
封装/外壳: 44-LCC(J 形引线)
包装: 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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