Board Components
15
Figure 3.8 The JTAG chain between the THDB-H2S board and Cyclone III Start Board
1-9
RS232 Transceiver and the 9-Pin Connector
This section describes the RS232 Transceiver and 9-Pin Connector on the THDB-H2S board
The THDB-H2S is equipped with a RS232 transceiver (U9) and a 9-pin connector (J7) to provide RS232 serial
I/O interface to the HSMC interface host board. The pin assignments of the RS232 interface are shown in
Table3.7.
Table 3.7 The pin assignments of the RS232 interface
RS232
Transceiver
Pin Number
RS232
Transceiver
Signal Name
HSMC Pin
Number
U9-11 UART_TXD 157
U9-12 UAR _RXD
T
158
1-10
SMA Connector
This section describes the SMA connector on the THDB-H2S board
The THDB-H2S board provides a SMA connector (J6) for external clock input. The pin assignments of the
SMA connector are shown in table 3.8.
Table 3.8 The pin assignments of the SMA connector
SMA
SMA
HSMC Pin
