參數(shù)資料
型號: PIC16C621-20/SS
元件分類: 微控制器/微處理器
英文描述: 8-BIT, OTPROM, 20 MHz, RISC MICROCONTROLLER, PDSO20
封裝: 0.209 INCH, PLASTIC, MO-150, SSOP-20
文件頁數(shù): 53/121頁
文件大?。?/td> 1202K
代理商: PIC16C621-20/SS
1999 Microchip Technology Inc.
DS30235H-page 37
PIC16C62X
7.0
COMPARATOR MODULE
The
comparator
module
contains
two
analog
comparators. The inputs to the comparators are
multiplexed with the RA0 through RA3 pins. The
On-Chip Voltage Reference (Section 8.0) can also be
an input to the comparators.
The CMCON register, shown in Register 7-1, controls
the comparator input and output multiplexers. A block
diagram of the comparator is shown in Figure 7-1.
REGISTER 7-1:
CMCON REGISTER (ADDRESS 1Fh)
R-0
U-0
R/W-0
C2OUT
C1OUT
CIS
CM2
CM1
CM0
R
= Readable bit
W = Writable bit
U
= Unimplemented bit, read
as ’0’
- n = Value at POR reset
- x = Unknown at POR reset
bit7
bit0
bit 7:
C2OUT: Comparator 2 output
1
= C2 VIN+ > C2 VIN
0
= C2 VIN+ < C2 VIN
bit 6:
C1OUT: Comparator 1 output
1
= C1 VIN+ > C1 VIN
0
= C1 VIN+ < C1 VIN
bit 5-4:
Unimplemented: Read as '0'
bit 3:
CIS: Comparator Input Switch
When CM<2:0>: = 001:
1
= C1 VIN– connects to RA3
0
= C1 VIN– connects to RA0
When CM<2:0> = 010:
1
= C1 VIN– connects to RA3
C2 VIN– connects to RA2
0
= C1 VIN– connects to RA0
C2 VIN– connects to RA1
bit 2-0:
CM<2:0>: Comparator mode.
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