PIC18F87J72-I/PT Microchip Technology, PIC18F87J72-I/PT Datasheet - Page 287

• Manufacturer Part Number: PIC18F87J72-I/PT
• Description: IC PIC MCU 8BIT 14KB FLSH 80TQFP
• Manufacturer: Microchip Technology
• Series: PIC® 18Fr

Specifications of PIC18F87J72-I/PT

• Program Memory Type: FLASH
• Program Memory Size: 128KB (64K x 16)
• Package / Case: 80-TQFP
• Core Processor: PIC
• Core Size: 8-Bit
• Speed: 48MHz
• Connectivity: I²C, LIN, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, LCD, LVD, POR, PWM, WDT
• Number Of I /o: 51
• Ram Size: 3.8K x 8
• Voltage - Supply (vcc/vdd): 2 V ~ 3.6 V
• Data Converters: A/D 12x12b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Data Bus Width: 8 bit
• Data Ram Size: 4 KB
• Interface Type: SPI, USART, SPI, I2C
• Maximum Clock Frequency: 8 MHz
• Number Of Programmable I/os: 51
• Number Of Timers: 4
• Operating Supply Voltage: 2 V to 3.6 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 14
• Controller Family/series: PIC18F
• No. Of I/o's: 51
• Ram Memory Size: 3923Byte
• Cpu Speed: 48MHz
• No. Of Timers: 4
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant

22.4
The dual-channel AFE has multiple data and power con-
nections that are independent of the digital side of the
microcontroller. These connections are required to use
the AFE, and are in addition to the connection and layout
connections provided in Section 2.0 “Guidelines for
Getting Started with PIC18FJ Microcontrollers”.
All of the connections required for proper operation of
the AFE are shown in Figure 22-3.
22.4.1
The AFE has independent voltage supply requirements
that differ from the rest of the microcontroller. Digital cir-
cuits are supplied through the SV
a voltage of 2.7V to 5.5V. Typically, SV
3.3V, the same as the V
cuits are separately supplied through the SAV
FIGURE 22-3:
 2010 Microchip Technology Inc.
Key (all values are recommendations):
C1 and C2: 0.1 F, 20V ceramic
C3 and C4: 100 nF, 20V ceramic.
Bold lines show SPI connections.
Note 1:
2:
AFE Connections
VOLTAGE AND GROUND
CONNECTIONS
Any available I/O pins may be used to control ARESET and CSA. The software examples discussed in this chapter
use RD0 and RD7, respectively.
The software examples discussed in this chapter use CCP1 to generate the AFE clock source. Other clock sources
may be used, as required.
Differential
Analog
Inputs
SV
SAV
REQUIRED CONNECTIONS FOR AFE OPERATION
DD
DD
DD
(3.3V)
and AV
(5V)
DD
DD
pin, which requires
DD
pins. Analog cir-
can be tied to
CH0-
CH0+
CH1-
CH1+
C1
DD
pin,
Preliminary
PIC18F8XJ72
C2
Analog GND
C3
PIC18F87J72 FAMILY
which requires a voltage of 4.5V to 5.5V (5V ±10%).
Independent ground returns are provided through the
SVss and SAVss pins, respectively.
As with the microcontroller’s V
pins, bypass capacitors are required on the AFE power
and return pin pairs. Requirements for these capacitors
are identical to those for the V
pins.
It is recommended that designs using PIC18F87J72
family devices incorporate a separate ground return
path for analog circuits. SAVss, as well as other AFE
analog pins (e.g., REFIN-) that require grounding,
should be tied to this analog return. SV
the digital ground, along with V
log and digital grounds may be tied to a single point at
the power source.
C4
CCP1
CLKIA
SDOA
SCKA
INT0
SDO
CSA
SCK
SDI
(2)
DD
DD
SS
/V
/V
and AV
SS
SS
DS39979A-page 287
SS
and AV
and AV
can be tied to
SS
. The ana-
DD
DD
/AV
/AV
SS
SS