P0033 Terasic Technologies Inc, P0033 Datasheet - Page 15

• Manufacturer Part Number: P0033
• Description: BOARD ADAPTER HSMC TO GPIO
• Manufacturer: Terasic Technologies Inc

Specifications of P0033

• Accessory Type: Adapter Board
• For Use With/related Products: Board with HSMC Connector
• Lead Free Status / RoHS Status: Not applicable / Not applicable

Board Components
JTAG Switch
1-8
The THDB-HTG board provides a JTAG switch (SW1) to short the JTGA signal “HSTC_TDI” and
“HSTC_TDO” together. When the THDB-HTG board is connected to a HSTC host board, this feature can
bypass the JTAG signal from host board to form a close loop of JTAG chain. For example, if users connect a
THDB-HTG with Altera DE3 board, this switch must be turned on, or the Stratix III FPGA device will not be
detected because the JTGA chain is not a close loop on DE3 board. Figure 3.6 shows the JTAG switch being
turned on.
Figure 3.6 The JTAG Switch in “ON” position
Power ON Control Pin
1-9
Pin 121 of the HSTC connector is defined as a “Power ON” control signal. This signal allows host board to
turn on/off the power supply on THDB-HTG board. When the Power ON signal is in logic low level, the 3.3V
and 5V on the expansion header will not supply any power. This feature is designed for THDB-HTG HSTC
version only.
I2C Serial EEPROM
1-10
This section describes the I2C Serial EEPROM on the THDB-HTG board
The THDB-HTG board provides a Microchip 24LC02BT EEPROM (U1) which can be configured by the I2C
interface. The size of the EEPROM is 2K-bit that can store the board information or user’s data. The detailed
pin description between EEPROM and HSMC connector is listed in the Table 3.4.
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