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DS90UB948-Q1: 948/947 BIST error

Part Number: DS90UB948-Q1

Hi Team,

My customer use 947 and 948, and found Screen display abnormal.

  • LOCK is high. There are data and clk in 947 and 948. 
  • When using PATTERN GENERATION, it can display seven color though Color bars are not filling the screen.
  • When use BIST to test, and read 948 0x67=0xff and 0x69=0x80. Which means BIST error flag..

console:/ # i2cset -f -y 2 0x2c 0x65 0x0                                       

console:/ # i2cset -f -y 2 0x2c 0x64 0x5                                       

console:/ # i2cset -f -y 2 0x2c 0x64 0x4                                       

console:/ # i2cset -f -y 2 0x2c 0x68 0x9

console:/ # i2cset -f -y 2 0x2c 0x66 0x19

console:/ # i2cget -f -y 2 0x2c 0x67 0xff

console:/ # i2cget -f -y 2 0x2c 0x69 0x80

console:/ # i2cget -f -y 2 0x2c 0x67 0xff

console:/ # i2cget -f -y 2 0x2c 0x69 0x80

Any advice?