www.diamondsystems.com
Zeta User Manual Rev 1.0
Page 29
12.4
Feature Description
12.4.1
Expansion Connector
Zeta daughter board is interfaced to Zeta base board using 40 pin expansion connector. It supports the following
interfaces.
•
Two PCIe x 1 lanes
•
HD Audio interface
•
SATA interface
•
USB2.0 interface
•
I2C interface
*Second PCIe port will be unused in the daughter board.
12.4.2
Power Supply
Zeta daughter board is powered from 5V and 3.3V on the expansion connector. The 1.5V required for the PCIe
Mini card socket is generated with a 3.3V to 1.5V LDO.
12.4.3
PCIe
PCIe lane 1 from the expansion connector is connected to PCIe Minicard socket; PCIe lane 2 from the expansion
connector is unused. PCIe Minicard socket supports full-size PCIe Minicards. Two threaded spacers are mounted
on the board for installing a full-size module. Mounting hole option for half-size module is also provided.
12.4.4
USB
USB 2.0 port 2 from the expansion connector is connected to PCIe Minicard socket. PCIe Minicard socket supports
full-size Disk-On-Module. Option to route the same USB2.0 port to 2x5 header is provided.
12.4.5
Audio
Zeta daughter board supports HD audio using Codec ALC892GR.The Codec ALC892GR supports stereo line in,
stereo line out and stereo mic in. These audio I/O signals are made available on a 2x5 header.
12.4.6
I2C
I2C interface from the expansion connector is connected to I2C expander PCA9535 for Digital IO expansion and
same I2C routed to 2x5 header along with optional USB2.0 port. By default, voltage level of I2C will be 3.3V and
onboard resistor jumper option is provided for 5V/3.3V selection.
I2C 7-bit
address
Device
Board
0100 010
I2C IO expander PCA9535
Zeta base board
0100 011
I2C IO expander PCA9535
Zeta base board
0100 100
I2C IO expander PCA9535
Zeta daughter board
Table 4: I2C address
Note:
Please contact DSC if there is an I2C address conflict
12.4.7
Digital IO
Zeta daughter board supports 16 Digital IOs via I2C expander PCA9535 on a 2x10 header. Jumper option to select
3.3V or 5V level and pull up/down option are provided.
12.4.8
LED Indicators