An EUI-48 address can be assigned as the actual physical address of a system hardware device or node, or it can
be assigned to a software instance. Such addresses are factory-programmed by Microchip and unique. They are
permanently write-protected in an extended memory block located outside the standard 2-Kbit memory array.
Each EEPROM has a specific I
2
C address and is connected to the same TWI bus interface.
• EEPROM1 (U12) I
2
C address: 1010_010[R/W]
• EEPROM2 (U13) I
2
C address: 1010_011[R/W]
Figure 3-30. Dual Serial EEPROM Schematic
A0
5
A1
4
SDA
3
SCL
1
VCC 6
VSS 2
24AA025E48
U13
A0
5
A1
4
SDA
3
SCL
1
VCC 6
VSS 2
24AA025E48
U12
10k
0402
1%
R140
10k
0402
1%
R139
VDD_3V3
GND
VDD_3V3
10k
0402
1%
R138
10k
0402
1%
R141
GND
VDD_3V3
GND
VDD_3V3
EEPROM2_TWD
EEPROM2_TWCK
EEPROM1_TWD
EEPROM1_TWCK
0x53
0x52
On Board EEPROM's
0.1uF
10V
0402
C143
0.1uF
10V
0402
C144
Table 3-16. EEPROM Signal Descriptions
PIO
Signal Name
Shared With
Device Signal Name
Signal Description
PC14
FLEXCOM8_IO0_PC14
ECC608
ECC608_TWD
TWI data line
CAM
CAM_TWD
EEPROM1
EEPROM1_TWD
EEPROM2
EEPROM2_TWD
PC13
FLEXCOM8_IO1_PC13
ECC608
ECC608_TWCK
TWI clock line
CAM
CAM_TWCK
EEPROM1
EEPROM1_TWCK
EEPROM2
EEPROM2_TWCK
Table 3-17. 24AA025E48 TWI Addresses
Device
7-bit Client Address
Full Address with RD/WR#
24AA025E48 TWI Read (U12)
1010_010
0xA5
24AA025E48 TWI Write (U12)
0xA4
24AA025E48 TWI Read (U13)
1010_011
0xA7
24AA025E48 TWI Write (U13)
0xA6
3.4
Peripheral Interfaces
Several interfaces and connectors are implemented in the SAMA7G54-EK to enable the user to test all the features
offered by the MPU and to facilitate a reference design for future customer applications.
This section describes the following peripherals mounted on the SAMA7G54-EK board:
SAMA7G54-EK
Function Blocks
©
2022 Microchip Technology Inc.
and its subsidiaries
User Guide
DS50003273A-page 39
