71M6521 Demo Board User’s Manual
Page: 12 of 111
© 2005-2009 TERIDIAN Semiconductor Corporation
Revision 2.18
Figure 1-3: The TERIDIAN 6521 Demo Board with Debug Board Block Diagram (CT Configuration)
All analog input signals are referenced to the V3P3 (3.3V power supply to the chip).
1.6.1 POWER SUPPLY SETUP
There are several choices for meter power supply:
•
Internal (using the AC line voltage). The internal power supply is only suitable when the line voltage
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.
An adapter may have to be used for the transition between the supplied 5 VDC power supply and the 5-
VDC connector on the D6521T4A10 version of the Demo Board.
DEMONSTRATION METER
IA
NEUTRAL
IA
V3P3
V A
3.3V
V A
GND
V3P3
GND
JP1
5V DC
EEPROM
V3P3
V3P3
ICE Connector
OPTO
OPTO
OPTO
OPTO
OPTO
W h
VARh
TX
RX
5V DC
V5_DBG
GND_DBG
V5_DBG
V5_DBG
RS-232
INTERFACE
DB9
to PC
COM Port
GND_DBG
V5_DBG
OPTO
OPTO
FPGA
11/27/2006
V5_NI
CE HEARTBEAT (1Hz)
MPU HEARTBEAT (5Hz)
DEBUG BOARD (OPTIONAL)
6521
Single Chip
M eter
TMUXOUT
CKTEST
5V LCD DISPLAY
DIO6
DIO7
DIO4
DIO5
RTM INTERFACE
LOAD A
IB
LOAD B
VB
IB
JP21
External Current
Transformers
J2
GND
N/C
N/C
4
15, 16
13, 14
6
6
8
12
10
V3P3D
N/C
3
1
2
5, 7,
9, 11
DB9
to PC
COM Port
On-board
components
powered by V3P3D