MIKROE-798 mikroElektronika, MIKROE-798 Datasheet - Page 31

• Manufacturer Part Number: MIKROE-798
• Description: Development Boards & Kits - PIC / DSPIC EASYPIC v7 DEVELOPMENT SYSTEM
• Manufacturer: mikroElektronika

Specifications of MIKROE-798

• Rohs: yes
• Product: Development Boards
• Tool Is For Evaluation Of: PIC18F45K22
• Core: PIC
• Interface Type: RS-232, USB
• Operating Supply Voltage: 5 V
• Description/function: Development board only, touch screen, pencil, DS1820, LCD, serial cable, GLCD not included
• Dimensions: 266 mm x 220 mm

I
2
In order to connect I
microcontroller you must enable SW4.7 and
SW4.8 switches, as shown on Figure 18-1. 1kΩ
pull-up resistors necessary for I
are already provided on SDA and SCL lines once
switches are turned on. Prior to using EEPROM in
your application, make sure to disconnect other
peripherals, LEDs and additional pull-up or pull-
down resistors from the interface lines in order
not to interfere with signal/data integrity.
Enabling I
C EEPROM
EEPROM-SCL
EEPROM-SDA
2
C EEPROM
R5
1K
2
C EEPROM to the
Figure 18-1:
Activate SW4.7 and
SW4.8 switches
to connect
microcontroller
I
EEPROM.
2
C lines to Serial
2
VCC-MCU
C communication
1K
R4
8
7
6
5
U8
24C08
VCC
WP
SDA
SCL
VSS
EEPROM is short for Electrically Erasable
Programmable Read Only Memory. It is usually
a secondary storage memory in devices containing
data that is retained even if the device looses power
supply. Because of the ability to alter single bytes
of data, EEPROM devices are used to store personal
preference and configuration data in a wide spectrum
of consumer, automotive, telecommunication, medical,
industrial, and PC applications.
EasyPIC
communication interface and has 1024 bytes of available
memory. Board contains socket for serial EEPROMs in DIP8
packaging, so you can easily exchange it with different memory
size EEPROM IC. EEPROM itself supports single byte or 16-byte (page)
write and read operations. Data rate is 400 kHz for both 3.3V and 5V
power supply.
What is I
I
systems. I²C uses only two open-drain lines, Serial Data Line (SDA) and Serial Clock (SCL), pulled up with
resistors. SCL line is driven by a master, while SDA is used as bidirectional line either by master or slave device.
Up to 112 slave devices can be connected to the same bus. Each slave must have a unique address.
A0
A1
A2
2
C is a multi-master serial single-ended bus that is used to attach low-speed peripherals to computer or embedded
1
2
3
4
VCC-MCU
™
v7 supports serial EEPROM which uses I
2
C?
VCC-MCU
C24
100nF
EEPROM-SCL
EEPROM-SDA
SW4
2
C
RC3
RC4
DATA BUS
Figure 18-1:
Schematic of
I
module
2
C EEPROM
page 31