Phytec phyFLEX-i.MX 6 - I2 C Interface Details

Serial Interfaces
 PHYTEC Messtechnik GmbH 2013 L-773e_2
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8.4.3 MAC Address
In a computer network such as a local area network (LAN), the MAC
(Media Access Control) address is a unique computer hardware
number. For a connection to the Internet, a table is used to convert the
assigned IP number to the hardware’s MAC address.
In order to guarantee that the MAC address is unique, all addresses are
managed in a central location. PHYTEC has acquired a pool of MAC
addresses. The MAC address of the phyFLEX-i.MX 6 is located on
the bar code sticker attached to the module. This number is a 12-digit
HEX value.
8.5 I
2
C Interface
The Inter-Integrated Circuit (I
2
C) interface is a two-wire, bidirectional
serial bus that provides a simple and efficient method for data
exchange among devices. The i.MX 6 contains three identical and
independent multimaster fast-mode I
2
C modules. The interface of the
second and third module (I2C2 and I2C3) are available on the
phyFLEX-Connectors. The first module connects to the on-board
EEPROM (refer to section 6.3) and to the EMIC at U19 (see
section 15). Both I2C interfaces which are brought out on the
connector have on board resistors which are laid-out for a capacitive
load of max. 150 pF in fast mode. The following table lists the I
2
C
port on the phyFLEX-Connector:
Pin # Signal ST Voltage Domain Description
X1A68 X_I2C0_SDA I/O VDD_3V3_LOGIC I2C0 data
X1A69 X_I2C0_SCL I/O VDD_3V3_LOGIC I2C0 clock
X1A71
reference-
voltage
REF_O VDD_3V3_LOGIC
I2C0 reference
voltage
X2A1 X_I2C1_SDA I/O VDD_3V3_LOGIC I2C1 data
X2A2 X_I2C1_SCL I/O VDD_3V3_LOGIC I2C1 clock
X2A3
reference-
voltage
REF_O VDD_3V3_LOGIC
I2C1 reference
voltage
Table 20: I
2
C Interface Signal Location
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