DM163014 Microchip Technology, DM163014 Datasheet - Page 21

• Manufacturer Part Number: DM163014
• Description: BOARD DEMO PICDEM4 12F629,16F630
• Manufacturer: Microchip Technology
• Type: MCUr

Specifications of DM163014

• Contents: Board, Cable, CD
• Processor To Be Evaluated: PIC18F1320 and PIC16F627A
• Interface Type: RS-232
• Silicon Manufacturer: Microchip
• Silicon Core Number: PIC12F629, PIC12F675, PIC16F630, PIC16F676
• Silicon Family Name: PIC12F, PIC16F And PIC18F
• Kit Contents: PICDEM 4 PCB, MCU Samples, Cables, CD
• Rohs Compliant: NA
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With/related Products: PIC12F, PIC16F, PIC18F (8,14,18 pins)
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: DM163014R; DM163014R; Q1543373

A.12 SUPERCAPACITOR

2003 Microchip Technology Inc.
The 0.33F (C5) Supercapacitor is used to demonstrate the low power capabilities of
PICmicro devices. This circuit requires all other peripherals to be disconnected from
the circuit. The Supercapacitor code, included on your PICDEM 4 CD, is configured so
that the device will remain in SLEEP most of the time, while a 32 kHz watch crystal (Y2)
connected to Timer1 keeps the PICmicro MCU running.
The device wakes up every second and toggles a port pin, and a second port pin indi-
cates the power start-up. If a power source is present, a high level is maintained;
otherwise, in the absence of power, the pin will go low.
In the event of a power failure, the Supercapacitor will supply the PICmicro MCU with
power through an internal protection diode on a port pin. If the user desires to measure
the Supercapacitor supply time, they will have to observe the power signals with an
oscilloscope or another demo board.
For Supercapacitor operation, these jumpers must be configured as follows:
• J3 - OFF (Power Supply)
• J4 - OFF (Power Supply)
• J22 - OFF (PORTA LEDs)
• J23 - ON (Supercapacitor)
• J26 - OFF (Potentiometer)
• J27 - OFF (Potentiometer)
• J28 - ON (LVD)
Note:
The Supercapacitor circuit described in this manual is used only to demon-
strate the low power capability of the device. The Supercapacitor is used as
an example for the low power source. DO NOT use this circuit as a
general design practice.
Hardware Detail
DS51337A-page 17