MIKROE-972 mikroElektronika, MIKROE-972 Datasheet - Page 37

• Manufacturer Part Number: MIKROE-972
• Description: Development Boards & Kits - ARM EASYMX PRO v7 ARM STELLARIS CORTEX-M3
• Manufacturer: mikroElektronika

Specifications of MIKROE-972

• Rohs: yes
• Product: Development Boards
• Tool Is For Evaluation Of: LM3S9B95
• Core: ARM Cortex M3
• Interface Type: CAN, I2C, SPI
• Operating Supply Voltage: 7 VAC to 23 VAC, 9 VDC to 32 VDC

EasyMx PRO
I
In order to connect I
microcontroller you must enable SW13.4 and
SW13.5 switches, as shown on Figure 23-2. 2K2
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.
2
Enabling I
DATA BUS
C EEPROM
2
C EEPROM
v7
2
C EEPROM to the
PB2
PB3
2
C communication
Figure 23-2:
Activate
SW13.4
and SW13.5
switches to
enable pull-up
resistors in I
lines of Serial
EEPROM.
SW13
2
C
EEPROM-SCL
EEPROM-SDA
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. EEPROMs come with parallel
or serial interface to the master device. 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.
EasyMx PRO
I
memory. EEPROM itself supports single byte or 16-byte (page) write and
read operations. Data rates are dependent of power supply voltage, and go up
to 400 kHz for 3.3V 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.
2
2
C is a multi-master serial single-ended bus that is used to attach low-speed peripherals to computer or embedded
C communication interface and has 1024 bytes of available
R62
2K2
™
2
VCC-3.3V
v7 for Stellaris
C?
R61
2K2
VCC-3.3V
®
8
7
6
5
supports serial EEPROM which uses
24AA01
U8
VCC
WP
SCL
SDA
VSS
A0
A1
A2
VCC-3.3V
1
2
3
4
VCC-3.3V
C38
100nF
Figure 23-1:
Schematic of
I
module
2
C EEPROM
page 37