Version 1.0
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2.8 I2C EEPROM
The UltraZed-EG SOM uses an
Atmel AT34C02D-MAHM
2-Kbit I2C EEPROM device. The Zynq
Ult MPSoC controller required for serial access is named I2C1 and it exists at MIO [25:24].
Table 18
– I2C1 TRM Pin Mapping
IO NAME
TRM SIGNAL NAME
NET NAME
PS_MIO24
SCL_OUT
MIO24_I2C1_SCL
PS_MIO25
SDA_OUT
MIO25_I2C1_SDA
The following table describes the connections to the I2C EEPROM.
Table 19
– Atmel AT34C02D Pin Mapping
EEPROM NAME EEPROM PIN
FUNCTION
NET NAME
A0
1
ADDRESS INPUT
GND
A1
2
ADDRESS INPUT
GND
A2
3
ADDRESS INPUT
GND
VSS
4
GROUND
GND
SDA
5
SERIAL ADDR/DATA
MIO25_I2C1_SDA
SCL
6
SERIAL CLOCK
MIO24_I2C1_SCL
WP
7
WRITE PROTECT
GND
VCC
8
POWER
+VCCO_PSIO0_500
The following figure describes the addressing required to access the I2C EEPROM. Please see the
appropriate device datasheet for further details regarding transactions to and from this device.
Figure 11
– I2C EEPROM Addressing
2.9 PS General Purpose Interrupt
The UltraZed-EG SOM contains a general purpose interrupt IO that is attached to PS MIO[23]. This interrupt
signal will contain a pull-up to +VCCO_PSIO0_500. The interrupt output (
INT#
) of the Texas Instruments
TCA9534
device is connected to the PS MIO [23].
Table 20
– PS Interrupt Pin Mapping
IO NAME
NET NAME
PS_MIO23
MIO23_INT_N
2.10 User I/O
2.10.1 PS MIO User Pins
The UltraZed-EG SOM provides 26 end-user PS MIO pins directly from Bank 501 of the Zynq Ult
MPSoC to the JX3 Connector. The 26 PS MIO pins connect to the Zynq Ult Processor Sub-System
for the implementation of peripherals such as USB, SPI, SDIO, CAN, UART, and I2C. These I/O pins can
also be used as general purpose I/O to connect push buttons, LEDs and/or switches to the UltraZed-EG
SOM from the end-user carrier card.