71M6534H Demo Board User’s Manual
Page: 13 of 86
© 2005-2007 TERIDIAN Semiconductor Corporation
V2-0
1.7.1 POWER SUPPLY SETUP
There are several choices for meter power supply:
•
Internal (using phase A of the AC line voltage). The internal power supply is only suitable when phase A
exceeds 220V RMS.
•
External 5VDC connector (J1) on the Demo Board
•
External 5VDC connector (J1) on the Debug Board.
The power supply jumper JP1 must be consistent with the power supply choice. JP1 connects the AC line
voltage to the internal power supply. This jumper should usually be left in place.
1.7.2 CABLE FOR SERIAL CONNECTION (DEBUG BOARD)
For connection of the DB9 serial port to a PC, either a straight or a so-called “null-modem” cable may be used.
JP1 and JP2 are plugged in for the straight cable, and JP3/JP4 are empty. The jumper configuration is reversed
for the null-modem cable, as shown in Table 1-1.
Cable
Configuration
Mode
Jumpers on Debug Board
JP1
JP2
JP3
JP4
Straight Cable
Default
Installed Installed
--
--
Null-Modem Cable
Alternative
--
--
Installed
Installed
Table 1-1: Jumper settings on Debug Board
JP1 through JP4 can also be used to alter the connection when the PC is not configured as a DCE device.
Table 1-2 shows the connections necessary for the straight DB9 cable and the pin definitions.
PC Pin
Function
Demo Board Pin
2 TX 2
3 RX 3
5 Signal
Ground 5
Table 1-2: Straight cable connections
Table 1-3 shows the connections necessary for the null-modem DB9 cable and the pin definitions.
PC Pin
Function
Demo Board Pin
2 TX 3
3 RX 2
5 Signal
Ground 5
Table 1-3: Null-modem cable connections
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