MA180027 Microchip Technology, MA180027 Datasheet - Page 49

• Manufacturer Part Number: MA180027
• Description: MOD PLUG-IN PIC18F87K90 PICDEM2
• Manufacturer: Microchip Technology
• Series: PIC®r

Specifications of MA180027

• Accessory Type: Plug-In Module (PIM) - PIC18F87K90
• Interface Type: I2C, SPI
• Operating Voltage: 1.8 V to 5.5 V
• Data Bus Width: 8 bit
• Maximum Operating Temperature: + 125 C
• Minimum Operating Temperature: - 40 C
• Silicon Manufacturer: Microchip
• Core Architecture: PIC
• Core Sub-architecture: PIC18
• Silicon Core Number: PIC18F
• Silicon Family Name: PIC18F8xxx
• For Use With/related Products: PICDEM LCD 2 Demonstration Board (DM163030)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: DM163030 - KIT DEV PICDEM LCD2
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

A.14 POWER SUPPLY
FIGURE A-11:
 2010 Microchip Technology Inc.
a)
VLCDBIAS = 3V, External Power
External Supply with
VLCDBIAS Regulated
(Default): This is the recom-
mended jumper setting to
operate when using external
supply. This configuration
allows the VLCDBIAS to be
of the board is higher than 3V.
regulated to 3V even if the V
Note:
EXAMPLE A
1
3
5
J15
For all examples shown above, the voltage regulation on the VLCDBIAS for 3V is not required for the
regular operation of the module or device. It is added here for additional protection for the glass since
the board is capable of generating 3.3V or 5V depending on the PIM being used.
There are four ways to supply power to the PICDEM LCD 2:
• A 3V button cell (CR2032) can be plugged into BT1.
• A 9V, 100 mA unregulated AC to DC supply can be plugged into J5. A
• A 100 mA regulated DC supply of maximum +5V can be connected to the hooks
MPLAB ICD 2 users may use the ICD to power the target board to 5V, up to 200 mA,
for the following devices only: PIC18F8490, PIC16F/LF/1946/7, PIC16F946 and
PIC16F916. The PIC18F85J90 and PIC18F87J90 families of devices do not support
this capability.
The default power on the board is 5V. The board voltage can be varied based on
resistors populated on the PIM in conjunction with the processor being used.
J15 POWER SUPPLY CIRCUIT SETTING EXAMPLES
power supply can be purchased through Microchip Technology
(Part Number AC162039).
provided.
Note:
2
4
6
DD
There is one J15 jumper associated with the power supply circuit. This
jumper must be correctly connected to select the required power supply.
Refer to Figure A-11 for jumper setting examples.
b)
Battery Operation: This is the
recommend jumper setting
when operating on a battery. In
this configuration, VLCDBIAS is
directly connected to the battery
voltage.
VLCDBIAS = Battery
EXAMPLE B
1
3
5
J15
Board Technical Information
2
4
6
c)
External Supply with VLCDBIAS
Unregulated: This is not recom-
mended to use with on-board glass
as voltage higher than 3V may
damage the glass.
If an external glass is connected to
J2 and is capable of handling
higher voltages, then this jumper
setting allows V
directly to the VLCDBIAS when an
external power supply is used.
VLCDBIAS = V
1
3
5
EXAMPLE C
J15
CC
DS51662C-page 49
to connect
2
4
6
CC