PIC16F648A-I/P Microchip Technology Inc., PIC16F648A-I/P Datasheet - Page 39

• Manufacturer Part Number: PIC16F648A-I/P
• Description: 18 PIN, 7 KB FLASH, 256 RAM, 16 I/O
• Manufacturer: Microchip Technology Inc.

Specifications of PIC16F648A-I/P

• Comparators: 2
• Cpu Speed: 5 MIPS
• Eeprom Memory: 256 Bytes
• Input Output: 16
• Interface: USART
• Memory Type: Flash
• Number Of Bits: 8
• Package Type: 18-pin PDIP
• Programmable Memory: 7K Bytes
• Ram Size: 256 Bytes
• Speed: 20 MHz
• Timers: 2-8-bit, 1-16-bit
• Voltage, Range: 2-5.5 V
• Lead Free Status / Rohs Status: RoHS Compliant part Electrostatic Device

6.0
The PIC16F630/676 devices have one analog compar-
ator. The inputs to the comparator are multiplexed with
the RA0 and RA1 pins. There is an on-chip Comparator
REGISTER 6-1:
 2003 Microchip Technology Inc.
COMPARATOR MODULE
bit 7
bit 6
bit 5
bit 4
bit 3
bit 2-0
CMCON — COMPARATOR CONTROL REGISTER (ADDRESS: 19h)
bit 7
Unimplemented: Read as ‘0’
COUT: Comparator Output bit
When CINV = 0:
1 = V
0 = V
When CINV = 1:
1 = V
0 = V
Unimplemented: Read as ‘0’
CINV: Comparator Output Inversion bit
1 = Output inverted
0 = Output not inverted
CIS: Comparator Input Switch bit
When CM2:CM0 = 110 or 101:
1 = V
0 = V
CM2:CM0: Comparator Mode bits
Figure 6-2 shows the Comparator modes and CM2:CM0 bit settings
Legend:
R = Readable bit
- n = Value at POR
U-0
—
IN
IN
IN
IN
IN
IN
+ > V
+ < V
+ < V
+ > V
- connects to CIN+
- connects to CIN-
IN
IN
IN
IN
COUT
-
-
-
-
R-0
U-0
—
W = Writable bit
’1’ = Bit is set
R/W-0
CINV
Voltage Reference that can also be applied to an input
of the comparator. In addition, RA2 can be configured
as the comparator output. The Comparator Control
Register (CMCON), shown in Register 6-1, contains
the bits to control the comparator.
R/W-0
U = Unimplemented bit, read as ‘0’
’0’ = Bit is cleared
CIS
PIC16F630/676
R/W-0
CM2
x = Bit is unknown
R/W-0
CM1
DS40039C-page 37
R/W-0
CM0
bit 0