import time
import sys

DesAddr=0xC0 #default value
SerAddr=0xB0 #default value
board.devAddr = DesAddr
board.WriteReg(0x01,0x06)
board.WriteReg(0x21,0x97)
time.sleep(1)
board.devAddr = SerAddr
--- this resets the digital logic
board.WriteReg(0x03,0xE5) 
board.WriteReg(0x03,0xC5)
board.WriteReg(0x2D,0x0F) #force 0x0f parity error
time.sleep(1)
board.devAddr = DesAddr
board.WriteReg(0x24,0x03) #enable BIST select 50MHz internal clock
time.sleep(10)
board.WriteReg(0x24,0x00) # disable BIST
time.sleep(1)
BIST_ERROR=board.ReadReg(0x25) #read bist errors
print hex(BIST_ERROR)