MA180025 Microchip Technology, MA180025 Datasheet - Page 33

• Manufacturer Part Number: MA180025
• Description: MODULE PLUG-IN PIC18F87J90 PIM
• Manufacturer: Microchip Technology
• Series: PIC®r

Specifications of MA180025

• Accessory Type: Plug-In Module (PIM) - PIC18F87J90
• Product: Microcontroller Modules
• Silicon Manufacturer: Microchip
• Core Architecture: PIC
• Core Sub-architecture: PIC18
• Silicon Core Number: PIC18F
• Silicon Family Name: PIC18FxxJxx
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With/related Products: PICDEM LCD 2 Demonstration Board (DM163030)
• For Use With: DM163030 - KIT DEV PICDEM LCD2
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

2.4
The on-chip voltage regulator enable pin, ENVREG,
must always be connected directly to either a supply
voltage or to ground. Tying ENVREG to V
the regulator, while tying it to ground disables the
regulator. Refer to Section 25.3 “On-Chip Voltage
Regulator” for details on connecting and using the
on-chip regulator.
When the regulator is enabled, a low-ESR (< 5Ω)
capacitor is required on the V
stabilize the voltage regulator output voltage. The
V
must use a capacitor of 10 F connected to ground. The
type can be ceramic or tantalum. A suitable example is
the Murata GRM21BF50J106ZE01 (10 F, 6.3V) or
equivalent. Designers may use Figure 2-3 to evaluate
ESR equivalence of candidate devices.
It is recommended that the trace length not exceed
0.25 inch (6 mm). Refer to Section 28.0 “Electrical
Characteristics” for additional information.
When the regulator is disabled, the V
must be tied to a voltage supply at the V
Refer to Section 28.0 “Electrical Characteristics” for
information on V
Note that the “LF” versions of some low pin count
PIC18FJ parts (e.g., the PIC18LF45J10) do not have
the ENVREG pin. These devices are provided with the
voltage regulator permanently disabled; they must
always be provided with a supply voltage on the
V
FIGURE 2-3:
 2010 Microchip Technology Inc.
CAP
DDCORE
0.001
Note:
0.01
/V
0.1
10
1
DDCORE
0.01
Voltage Regulator Pins (ENVREG
and V
pin.
Data for Murata GRM21BF50J106ZE01 shown.
Measurements at 25°C, 0V DC bias.
0.1
pin must not be connected to V
DD
CAP
and V
Frequency (MHz)
/V
FREQUENCY vs. ESR
PERFORMANCE FOR
SUGGESTED V
1
DDCORE
DDCORE
10
CAP
)
.
100
/V
CAP
DDCORE
DDCORE
/V
CAP
1000 10,000
DD
DDCORE
enables
DD
pin to
level.
and
pin
PIC18F87J90 FAMILY
2.5
The PGC and PGD pins are used for In-Circuit Serial
Programming™ (ICSP™) and debugging purposes. It
is recommended to keep the trace length between the
ICSP connector and the ICSP pins on the device as
short as possible. If the ICSP connector is expected to
experience an ESD event, a series resistor is recom-
mended, with the value in the range of a few tens of
ohms, not to exceed 100Ω.
Pull-up resistors, series diodes, and capacitors on the
PGC and PGD pins are not recommended as they will
interfere with the programmer/debugger communica-
tions to the device. If such discrete components are an
application requirement, they should be removed from
the circuit during programming and debugging. Alter-
natively, refer to the AC/DC characteristics and timing
requirements information in the respective device
Flash programming specification for information on
capacitive loading limits, and pin input voltage high
(V
For device emulation, ensure that the “Communication
Channel Select” (i.e., PGCx/PGDx pins) programmed
into the device matches the physical connections for
the ICSP to the Microchip debugger/emulator tool.
For
development tools connection requirements, refer
toSection 27.0 “Development Support”.
IH
) and input low (V
more
ICSP Pins
information
IL
) requirements.
on
available
DS39933D-page 33
Microchip