Murata Electronics North America DNT900 Manual Do Utilizador
www.RFM.com
Technical support +1.800.704.6079
Page 52 of 58
©2008 by RF Monolithics, Inc.
E-mail: tech sup@rfm.com
DNT900 - 11/05/08
Figure 5.6.2
Figure 5.6.2 shows the connectors to the right of the DNT900P mounting socket. Jumper pin set J9 allow
the DNT900P reset line to be routed to JTAG interface connector J10. J18 allows the DNT900P reset line
to be grounded. Note that the JTAG operation is usually limited to factory testing. For normal operation
pin sets J9 and J18 should not have a shorting block installed. Jumper pin sets J12 and J13 normally
have shorting plugs installed as shown in Figure 5.6.2, which connects the DNT900P UART0_TXD and
UART0_RXD pins to the respective serial data lines on the evaluation board. It is possible to connect
directly to UART0_TXD and UART0_RXD by moving the jumpers over. In this case, J1 1-1 is the input for
transmitted data and J1 1-2 is the output for received data. Note this a 3 V logic interface. Placing a short-
ing plug on jumper pin set J6 allows the DNT900P to be powered up in boot loader mode. This is used for
factory code loads and functional testing. The DNT900 has its own boot loader utility that allows the
protocol firmware to be installed with a terminal program that supports YMODEM. Pin strip J7 provides
access to various DNT900 pins as shown on the silkscreen. Pressing switch SW2 will reset the
DNT900P.
the DNT900P reset line to be routed to JTAG interface connector J10. J18 allows the DNT900P reset line
to be grounded. Note that the JTAG operation is usually limited to factory testing. For normal operation
pin sets J9 and J18 should not have a shorting block installed. Jumper pin sets J12 and J13 normally
have shorting plugs installed as shown in Figure 5.6.2, which connects the DNT900P UART0_TXD and
UART0_RXD pins to the respective serial data lines on the evaluation board. It is possible to connect
directly to UART0_TXD and UART0_RXD by moving the jumpers over. In this case, J1 1-1 is the input for
transmitted data and J1 1-2 is the output for received data. Note this a 3 V logic interface. Placing a short-
ing plug on jumper pin set J6 allows the DNT900P to be powered up in boot loader mode. This is used for
factory code loads and functional testing. The DNT900 has its own boot loader utility that allows the
protocol firmware to be installed with a terminal program that supports YMODEM. Pin strip J7 provides
access to various DNT900 pins as shown on the silkscreen. Pressing switch SW2 will reset the
DNT900P.