PIC16F785-I/P Microchip Technology Inc., PIC16F785-I/P Datasheet - Page 77

• Manufacturer Part Number: PIC16F785-I/P
• Description: MCU, 8-Bit, 2KW Flash, 128 RAM, 18 I/O, DIP-20
• Manufacturer: Microchip Technology Inc.

Specifications of PIC16F785-I/P

• A/d Inputs: 12-Channel, 10-Bit
• Comparators: 2
• Cpu Speed: 5 MIPS
• Eeprom Memory: 256 Bytes
• Input Output: 17
• Memory Type: Flash
• Number Of Bits: 8
• Package Type: 20-pin PDIP
• Programmable Memory: 3.5K Bytes
• Ram Size: 128 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

11.0
The OPA module has the following features:
• Two independent Operational Amplifiers
• External connections to all ports
• 3 MHz Gain Bandwidth Product (GBWP)
11.1
The OPA1CON register, shown in Register 11-1,
controls OPA1. OPA2CON, shown in Register 11-2,
controls OPA2.
FIGURE 11-1:
© 2006 Microchip Technology Inc.
OPERATIONAL AMPLIFIER
(OPA) MODULE
Control Registers
RC3/AN7/C12IN3-/OP1
RC2/AN6/C12IN2-/OP2
OPA MODULE BLOCK DIAGRAM
RB5/AN11/OP2+
RC7/AN9/OP1+
RB4/AN10/OP2-
RC6/AN8/OP1-
Preliminary
OPA1
OPA2
11.2
The OPA module is enabled by setting the OPAON bit
(OPAxCON<7>). When enabled, OPAON forces the
output driver of RC3/AN7/C12IN3-/OP1 for OPA1, and
RC2/AN6/C12IN2-/OP2 for OPA2, into tri-state to
prevent contention between the driver and the OPA
output.
OPA1CON<OPAON>
OPA2CON<OPAON>
Note:
PIC16F785/HV785
OPAxCON Register
TO ADC and Comparator MUXs
TO ADC and Comparator MUXs
When OPA1 or OPA2 is enabled, the
RC3/AN7/C12IN3-/OP1 pin, or
RC2/AN6/C12IN2-/OP2 pin, respectively,
is driven by the op amp output, not by the
PORTC driver. Refer to Table 19-11 for the
electrical specifications for the op amp
output drive capability.
DS41249D-page 75