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| 型號(hào)： | PIC16LC662T-04/L |
| 元件分類(lèi)： | 微控制器/微處理器 |
| 英文描述： | 8-BIT, OTPROM, 4 MHz, RISC MICROCONTROLLER, PQCC44 |
| 封裝： | PLASTIC, LCC-44 |
| 文件頁(yè)數(shù)： | 81/136頁(yè) |
| 文件大?。?/td> | 634K |
| 代理商： | PIC16LC662T-04/L |
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1996 Microchip Technology Inc.
Preliminary
DS30559A-page 49
PIC16C64X & PIC16C66X
The code example in Example 7-1 depicts the steps
required to congure the comparator module. RA3 and
RA4 are congured as digital outputs. RA0 and RA1
are congured as the V- inputs and RA2 as the V+ input
to both comparators.
EXAMPLE 7-1:
INITIALIZING THE
COMPARATOR MODULE
FLAG_REG
EQU 0x20
CLRF
FLAG_REG
;Init Flag Register
CLRF
PORTA
;Init PORTA
ANDLW
0xC0
;Mask Comp bits
IORWF
FLAG_REG,F
;Bits to Flag_Reg
MOVLW
0x03
;Init Comp Mode
MOVWF
CMCON
;CM2:CM0 = 011
BSF
STATUS,RP0
;Select Bank 1
MOVLW
0x07
;Init Data direction
MOVWF
TRISA
;RA<2:0> to inputs
;RA<4:3> to outputs
;TRISA<7:5> read '0'
BCF
STATUS,RP0
;Select Bank 0
CALL
DELAY_10
s
;10
s delay
MOVF
CMCON,F
;Read CMCON to end
;change condition
BCF
PIR1,CMIF
;Clear Pending Ints
BSF
STATUS,RP0
;Select Bank 1
BSF
PIE1,CMIE
;Enable Comp Ints
BCF
STATUS,RP0
;Select Bank 0
BSF
INTCON,PEIE
;Enable Periph Ints
BSF
INTCON,GIE
;Global Int enable
7.2
Comparator Operation
A single comparator is shown in Figure 7-3 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 7-3 represents
the uncertainty due to input offsets and response time.
7.3
Comparator Reference
An external or internal reference signal may be used
depending on the comparator operating mode. The
analog signal that is present at VIN– is compared to the
signal at VIN+, and the digital output of the comparator
is adjusted accordingly (Figure 7-3).
FIGURE 7-3:
SINGLE COMPARATOR
7.3.1
EXTERNAL REFERENCE SIGNAL
When external voltage references are used, the
comparator module can be congured to have the com-
parators operate from the same or different reference
sources. However, threshold detector applications may
require the same reference. The reference signal must
be between VSS and VDD, and can be applied to either
pin of the comparator(s).
7.3.2
INTERNAL REFERENCE SIGNAL
The comparator module also allows the selection of an
internally
generated
voltage
reference
for
the
comparators. Section 8.0, contains a detailed descrip-
tion of the Voltage Reference Module that provides this
signal. The internal reference signal is used when the
comparators
are
in
mode
CM2:CM0 = 010
(Figure 7-2). In this mode, the internal voltage refer-
ence is applied to the VIN+ pin of both comparators.
VIN-
VIN+
Output
VIN-
VIN+
Output
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| PIC16LC66T-04/SO | 功能描述:8位微控制器 -MCU 14KB 368 RAM 22 I/O RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線(xiàn)寬度:8 bit 最大時(shí)鐘頻率:50 MHz 程序存儲(chǔ)器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風(fēng)格:SMD/SMT |
| PIC16LC66T-04I/SO | 功能描述:8位微控制器 -MCU 14KB 368 RAM 22 I/O RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線(xiàn)寬度:8 bit 最大時(shí)鐘頻率:50 MHz 程序存儲(chǔ)器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風(fēng)格:SMD/SMT |
| PIC16LC67-04/L | 功能描述:8位微控制器 -MCU 14KB 368 RAM 33 I/O RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線(xiàn)寬度:8 bit 最大時(shí)鐘頻率:50 MHz 程序存儲(chǔ)器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風(fēng)格:SMD/SMT |
| PIC16LC67-04/P | 功能描述:8位微控制器 -MCU 14KB 368 RAM 33 I/O RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線(xiàn)寬度:8 bit 最大時(shí)鐘頻率:50 MHz 程序存儲(chǔ)器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風(fēng)格:SMD/SMT |
| PIC16LC67-04/PQ | 功能描述:8位微控制器 -MCU 14KB 368 RAM 33 I/O RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線(xiàn)寬度:8 bit 最大時(shí)鐘頻率:50 MHz 程序存儲(chǔ)器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風(fēng)格:SMD/SMT |
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