ZHCSOU1 February 2023 DS90UB638-Q1
PRODUCTION DATA
The DS90UB638-Q1 includes an internal Channel Monitor Loop-through output on the CMLOUTP and CMLOUTN pins which provides a functional check of the receive channel. CMLOUT is useful in identifying gross signal conditioning issues.
#GUID-35E251D3-0B1F-4895-AC78-BEDBD510C332/SNLS5061646 includes details on selecting the RX receiver of CMLOUTP and CMLOUTN configuration. To disable the CMLOUT, either follow the instructions in table to reload register default values, or reset the DS90UB638-Q1.
FPD-Link III RX Port 0 | ||
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ENABLE MAIN LOOP-THROUGH DRIVER | 0xB0 = 0x14; 0xB1 = 0x00; 0xB2 = 0x80 0xB1 = 0x03; 0xB2 = 0x28 0xB1 = 0x04; 0xB2 = 0x28 | |
SELECT CHANNEL MUX | 0xB1 = 0x02; 0xB2 = 0x20 | |
SELECT RX PORT | 0xB0 = 0x04; 0xB1 = 0x0F; 0xB2 = 0x01 0xB1 = 0x10; 0xB2 = 0x02 | |
DISABLE MAIN LOOP-THROUGH DRIVER | 0xB0 = 0x14; 0xB1 = 0x00; 0xB2 = 0x00 0xB1 = 0x03 ; 0xB2 = 0x08 0xB1 = 0x04; 0xB2 = 0x08 | |
DESELECT CHANNEL MUX | 0xB1 = 0x02; 0xB2 = 0x20 | |
DESELECT RX PORT | 0xB0 = 0x04; 0xB1 = 0x0F; 0xB2 = 0x00 0xB1 = 0x10; 0xB2 = 0x00 |