Dsp / Ani / Comm / Lui - GE LPS-O Instruction Manual

3 HARDWARE DESCRIPTION
The digital signal processor (DSP), located on the DSP/ANI board, contains the TMS320C52 digital signal pro-
cessor chip and its required memory. The DSP is responsible for most of the numerical calculations in the LPS-
O. It performs a recursive Fourier transform calculation to transform the digitized waveforms into phasor quan-
tities. It also handles the data acquisition through the ANI section of the board. The keypad, display and com-
munications interfaces are also on the DSP/ANI Board. Figure 3–10: BLOCK DIAGRAM OF THE DSP /
COMM / LUI MODULE is the block diagram of the DSP/ANI Board.
ADDRESS
PROGRAM
RAM
E P R O M
TMS320C52
DIGITAL SIGNAL
PROCESSOR
A/D &
LATCHES
M U X
VREF
ANI CIRCUITRY
CURRENTS / VOLTAGES
Figure 3–10: BLOCK DIAGRAM OF THE DSP / COMM / LUI MODULE
GE Power Management
DATA
DATA
DUAL-PORT
RAM
CONTROL
LOGIC
END OF
CONVERSION
SCAN
ENABLE
SYNC
ANALOG
SEQUENCER
CONTROL LOGIC
LPS-O Line Protection System
3.3 PRINTED CIRCUIT BOARD MODULES

3.3.9 DSP / ANI / COMM / LUI

CONTROL
CONTROL TIMER /
LOGIC COUNTER
REAR COMM REAR COMM
INTERFACE PL2 INTERFACE PL3
CLOCK
3
SEEP LINK
SERIAL EPROM
INTERFACE
DIGITAL I/O
INTERFACE
KEYBOARD
INTERFACE
DISPLAY / LED
INTERFACE
FRONT RS-232C
INTERFACE
3-
13