PIC16F785-I/P Microchip Technology Inc., PIC16F785-I/P Datasheet - Page 74

• 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

PIC16F785/HV785
10.2
The VR Reference module generates a 1.2V nominal
output voltage for use by the ADC and comparators.
The output voltage can also be brought out to the V
pin for user applications. This module uses a bandgap
as a reference. See Table 19-9 for detailed specifica-
tions. Register 10-2 shows the control register for the
VR module.
REGISTER 10-2:
DS41249D-page 72
VR Reference Module
bit 7-6
bit 5
bit 4
bit 3
bit 2
bit 1
bit 0
REFCON: VOLTAGE REFERENCE CONTROL REGISTER (ADDRESS: 98h)
Unimplemented: Read as ‘0’
BGST: Band Gap Reference Voltage Stable Flag bit
1 = Reference is stable
0 = Reference is not stable
VRBB: Voltage Reference Buffer Bypass bit
1 = V
0 = V
VREN: Voltage Reference Enable bit (VR = 1.2V nominal)
1 = VR reference is enabled
0 = VR reference is disabled and does not consume any current
VROE: Voltage Reference Output Enable bit
If CVROE = 0:
1 = V
0 = Disabled, 1.2 volt VR analog reference is used internally only
If CVROE = 1:
CVROE: Comparator Voltage Reference Output Enable bit (see Figure 10-2)
1 = V
0 = V
Unimplemented: Read as ‘0’
bit 7
Legend:
R = Readable bit
-n = Value at POR
Note 1: Buffer amplifier common mode limitations require V
VROE has no effect.
U-0
—
REF
REF
REF
REF
REF
2: VREN is fixed high for PIC16HV785 device.
output is not buffered. Power is removed from buffer amplifier.
output is buffered
output on RA1/AN1/C12IN0-/V
output on RA1/AN1/C12IN0-/V
output on RA1/AN1/C12IN0-/V
output.
U-0
—
BGST
R-0
(1)
REF
Preliminary
W = Writable bit
‘1’ = Bit is set
R/W-0
VRBB
REF
REF
REF
/ICSPCLK pin is 1.2 volt VR analog reference
/ICSPCLK pin is CV
/ICSPCLK pin is controlled by VROE
U = Unimplemented bit, read as ‘0’
‘0’ = Bit is cleared
R/W-0
VREN
(2)
R/W-0
VROE
REF
REF
© 2006 Microchip Technology Inc.
voltage
(V
DD
x = Bit is unknown
CVROE
R/W-0
- 1.4)V for buffered
U-0
—
bit 0