PIC12F675-I/SN Microchip Technology, PIC12F675-I/SN Datasheet - Page 41

• Manufacturer Part Number: PIC12F675-I/SN
• Description: IC MCU CMOS FLSH-BASE 8BIT 8SOIC
• Manufacturer: Microchip Technology
• Series: PIC® 12Fr

Specifications of PIC12F675-I/SN

• Program Memory Type: FLASH
• Program Memory Size: 1.75KB (1K x 14)
• Package / Case: 8-SOIC (3.9mm Width)
• Core Processor: PIC
• Core Size: 8-Bit
• Speed: 20MHz
• Peripherals: POR, WDT
• Number Of I /o: 5
• Eeprom Size: 128 x 8
• Ram Size: 64 x 8
• Voltage - Supply (vcc/vdd): 2 V ~ 5.5 V
• Data Converters: A/D 4x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Processor Series: PIC12F
• Core: PIC
• Data Bus Width: 8 bit
• Data Ram Size: 64 B
• Interface Type: RS- 232/USB
• Maximum Clock Frequency: 20 MHz
• Number Of Programmable I/os: 6
• Number Of Timers: 2
• Operating Supply Voltage: 2 V to 5.5 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• 3rd Party Development Tools: 52715-96, 52716-328, 52717-734, 53270-913
• Development Tools By Supplier: PG164130, DV164035, DV244005, DV164005, PG164120, ICE2000, DM163014, DM164120-4
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 4-ch x 10-bit
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Connectivity: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

6.5
The comparator module also allows the selection of an
internally generated voltage reference for one of the
comparator inputs. The internal reference signal is
used for four of the eight Comparator modes. The
VRCON register, Register 6-2, controls the voltage
reference module shown in Figure 6-5.
6.5.1
The voltage reference can output 32 distinct voltage
levels, 16 in a high range and 16 in a low range.
FIGURE 6-5:
6.6
Response time is the minimum time, after selecting a
new reference voltage or input source, before the
comparator output is ensured to have a valid level. If
the internal reference is changed, the maximum delay
of the internal voltage reference must be considered
when using the comparator outputs. Otherwise, the
maximum delay of the comparators should be used
(Table 12-7).
6.7
Both the comparator and voltage reference, if enabled
before entering Sleep mode, remain active during
Sleep. This results in higher Sleep currents than shown
in the power-down specifications. The additional cur-
rent consumed by the comparator and the voltage ref-
erence is shown separately in the specifications. To
minimize power consumption while in Sleep mode, turn
off the comparator, CM2:CM0 = 111, and voltage refer-
ence, VRCON<7> = 0.
 2010 Microchip Technology Inc.
V
DD
Comparator
Comparator Reference
Comparator Response Time
Operation During Sleep
CV
CONFIGURING THE VOLTAGE
REFERENCE
REF
VREN
Input
to
COMPARATOR VOLTAGE REFERENCE BLOCK DIAGRAM
VR3:VR0
16-1 Analog
8R
MUX
R
R
16 Stages
The following equations determine the output voltages:
6.5.2
The full range of V
the construction of the module. The transistors on the
top and bottom of the resistor ladder network
(Figure 6-5) keep CV
V
fore, the CV
V
Voltage Reference can be found in Section 12.0
“Electrical Specifications”.
While the comparator is enabled during Sleep, an inter-
rupt will wake-up the device. If the device wakes up
from Sleep, the contents of the CMCON and VRCON
registers are not affected.
6.8
A device Reset forces the CMCON and VRCON
registers to their Reset states. This forces the
comparator module to be in the Comparator Reset
mode, CM2:CM0 = 000 and the voltage reference to its
off state. Thus, all potential inputs are analog inputs
with the comparator and voltage reference disabled to
consume the smallest current possible.
VRR = 1 (low range): CV
VRR = 0 (high range): CV
V
DD
DD
DD
. The tested absolute accuracy of the Comparator
. The Voltage Reference is V
/ 32)
R
Effects of a Reset
VOLTAGE REFERENCE
ACCURACY/ERROR
REF
PIC12F629/675
R
output changes with fluctuations in
SS
to V
REF
REF
REF
DD
from approaching V
= (VR3:VR0 / 24) x V
cannot be realized due to
= (V
8R
DD
DD
derived and there-
/ 4) + (VR3:VR0 x
DS41190G-page 41
VRR
SS
DD
or