PIC18F86J50T-I/PT Microchip Technology, PIC18F86J50T-I/PT Datasheet - Page 341

• Manufacturer Part Number: PIC18F86J50T-I/PT
• Description: IC,MICROCONTROLLER,8-BIT,PIC CPU,CMOS,TQFP,64PIN,PLASTIC
• Manufacturer: Microchip Technology
• Series: PIC® 18Fr

Specifications of PIC18F86J50T-I/PT

• Core Processor: PIC
• Core Size: 8-Bit
• Speed: 48MHz
• Connectivity: EBI/EMI, I²C, SPI, UART/USART, USB
• Peripherals: Brown-out Detect/Reset, LVD, POR, PWM, WDT
• Number Of I /o: 65
• Program Memory Size: 64KB (32K x 16)
• Program Memory Type: FLASH
• Ram Size: 3.8K x 8
• Voltage - Supply (vcc/vdd): 2 V ~ 3.6 V
• Data Converters: A/D 12x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 80-TFQFP
• Processor Series: PIC18F
• Core: PIC
• Data Bus Width: 8 bit
• Data Ram Size: 3904 B
• Interface Type: I2C, MSSP, SPI, EUSART
• Maximum Clock Frequency: 48 MHz
• Number Of Programmable I/os: 65
• Number Of Timers: 5
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• 3rd Party Development Tools: 52715-96, 52716-328, 52717-734, 52712-325, EWPIC18
• Development Tools By Supplier: PG164130, DV164035, DV244005, DV164005, PG164120, ICE2000, ICE4000, DV164136, DM183022, DM183032
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 10 bit, 12 Channel
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: AC162087 - HEADER MPLAB ICD2 18F87J50 68/84MA180021 - MODULE PLUG-IN 18F87J50 FS USBAC164328 - MODULE SKT FOR 80TQFP
• Eeprom Size: -
• Lead Free Status / Rohs Status: Details
• Other names: PIC18F86J50T-I/PTTR

23.5
Each comparator has up to eight possible combina-
tions of inputs: up to four external analog inputs, and
one of two internal voltage references.
Both comparators allow a selection of the signal from
pin, CxINA, or the voltage from the comparator refer-
ence (CV
compared to either CxINB, CxINC, CXIND or the micro-
controller’s fixed internal reference voltage (V
nominal) on the inverting channel. The comparator
inputs and outputs are tied to fixed I/O pins, defined in
Table 23-1. The available comparator configurations
and their corresponding bit settings are shown in
Figure 23-4.
TABLE 23-1:
23.5.1
Setting the CON bit of the CMxCON register
(CMxCON<7>) enables the comparator for operation.
Clearing the CON bit disables the comparator resulting
in minimum current consumption.
The CCH1:CCH0 bits in the CMxCON register
(CMxCON<1:0>) direct either one of three analog input
pins, or the Internal Reference Voltage (V
comparator V
ing mode, either an external or internal voltage
reference may be used. The analog signal present at
V
output of the comparator is adjusted accordingly.
The external reference is used when CREF = 0
(CMxCON<2>) and V
pin. When external voltage references are used, the
comparator module can be configured to have the ref-
erence sources externally. The reference signal must
be between V
pin of the comparator.
© 2009 Microchip Technology Inc.
Note 1:
IN
Comparator
- is compared to the signal at V
1
2
Comparator Control and
Configuration
REF
Available in 80-pin devices only.
COMPARATOR ENABLE AND
INPUT SELECTION
IN
) on the non-inverting channel. This is
SS
-. Depending on the comparator operat-
and V
COMPARATOR INPUTS AND
OUTPUTS
Input or Output
C1INC (V
C2INC(V
C2IND(V
C1INA (V
C1INB (V
C2INA(V
C2INB(V
IN
DD
C1OUT
C2OUT
+ is connected to the CxINA
, and can be applied to either
IN
IN
IN
IN
IN
IN
IN
-)
-)
-)
+)
+)
-)
-)
(1)
(1)
(1)
IN
+ and the digital
I/O Pin
IRV
RH6
RH4
RH5
RC5
RF6
RF5
RF7
RF5
RF2
IRV
), to the
(1)
(1)
(1)
, 1.2V
PIC18F87J50 FAMILY
The comparator module also allows the selection of an
internally generated voltage reference (CV
the comparator voltage reference module. This module
is described in more detail in Section 23.0 “Compara-
tor Module”. The reference from the comparator
voltage reference module is only available when
CREF = 1. In this mode, the internal voltage reference
is applied to the comparator’s V
23.5.1.1
In PIC18F87J10 family devices, the C and D input
channels for both comparators are linked to pins in
PORTH and cannot be reassigned to alternate analog
inputs. Because of this, 64-pin devices offer a total of 4
different configurations for each comparator. In con-
trast, 80-pin devices offer a choice of 6 configurations
for
Comparator 2. The configurations shown in Figure 23-4
are footnoted to indicate where they are not available.
23.5.2
The comparator outputs are read through the CMSTAT
register. The CMSTAT<0> reads the Comparator 1 out-
put and CMSTAT<1> reads the Comparator 2 output.
These bits are read-only.
The comparator outputs may also be directly output to
the RF1 and RF2 I/O pins by setting the COE bit
(CMxCON<6>). When enabled, multiplexors in the
output path of the pins switch to the output of the com-
parator. The TRISF<1:2> bits still function as the digital
output enable for the RF1 and RF2 pins while in this
mode.
By default, the comparator’s output is at logic high
whenever the voltage on V
The polarity of the comparator outputs can be inverted
using the CPOL bit (CMxCON<5>).
The uncertainty of each of the comparators is related to
the input offset voltage and the response time given in
the specifications, as discussed in Section 23.2
“Comparator Operation”.
Note:
Comparator
The comparator input pin selected by
CCH1:CH0 must be configured as an input
by setting both the corresponding TRISF or
TRISH bit, and the corresponding PCFG bit
in the ANCON1 register.
COMPARATOR ENABLE AND
OUTPUT SELECTION
Comparator Configurations in 64-Pin
and 80-Pin Devices
1,
and
IN
+ is greater than on V
8
IN
+ pin.
configurations
DS39775C-page 341
REF
) from
IN
for
-.