MIKROE-411 mikroElektronika, MIKROE-411 Datasheet - Page 19

• Manufacturer Part Number: MIKROE-411
• Description: Development Boards & Kits - PIC / DSPIC EASYPIC6 DEVELOPMENT SYSTEM
• Manufacturer: mikroElektronika

Specifications of MIKROE-411

• Rohs: yes
• Product: Development Kits
• Core: PIC
• Interface Type: CAN, IDC10, JTAG, RS-232, USB
• Operating Supply Voltage: 9 V to 32 V
• Data Bus Width: 8 bit
• Description/function: Development Board Only, Touch Screen, Pencil, DS1820, LCD, Serial Cable, GLCD are not included
• Dimensions: 265 mm x 220 mm
• Maximum Operating Temperature: + 125 C
• Minimum Operating Temperature: - 55 C
• For Use With: PIC16F887

EasyPIC6 Development System
14.0. Keypads
There are two keypads provided on the EasyPIC6 development system. These are keypad 4x4 and keypad MENU. Keypad 4x4 is a standard
alphanumeric keypad connected to the microcontroller PORTD. The performance of such a keypad is based on the ‘scan and sense’ principle
performed from within software. For example, pressing button ‘6’ will cause a logic one (1) to appear on the RD2 pin. In order to determine
which of the push buttons is pressed, a logic one (1) is applied to each of the following output pins RD4, RD5, RD6 and RD7.
Keypad MENU buttons are connected in a similar way to the PORTA buttons. The only difference is in the button arrangement. The keypad
MENU buttons are arranged so as to provide easy navigation through menus.
Figure 14-4: Keypads (4x4 and MENU) and microcontroller connection schematic
Jumper J17 is
in the pull-up
position. Pins
RD2 and RD3
are connected
to pull-down
resistors through
DIP switch SW4
C6
22pF
X1
8MHz
Keypad 4x4
22pF
VCC-MCU
C7
DIP40
MCLR
RA0
RA1
RA2
RA3
RA4
RA5
RE0
RE1
RE2
VCC
GND
OSC1
OSC2
RC0
RC1
RC2
RC3
RD0
RD1
GND
VCC
RD7
RD6
RD5
RD4
RC7
RC6
RC5
RC4
RD3
RD2
RB7
RB6
RB5
RB4
RB3
RB2
RB0
RB1
VCC-MCU
J4
VCC-
MCU
RD4
RD5
RD6
RD7
RN4
SW4
R60
220R
R59
220R
R61
220R
R62
220R
Keypad 4x4 performance
D8
D9
D10
D11
8x10K
A
BAT43
T37
T38
T39
T40
K
Side view
T42
T43
T44
T45
T46
T47
T48
T49
T50
T51
T52
T53
T58
T55
Keypad MENU
J17
VCC-MCU
T57
T54
J24
T56
MikroElektronika
T59
R58
220R
19