ZHCSJH7 March 2019 DS90UB940N-Q1
PRODUCTION DATA.
The DS90UB940N-Q1 can be configured for several different operating modes either through the MODE_SEL[1:0] input pins or through register bits 0x23 [4:3] (MODE_SEL1) and 0x6A [5:4] (MODE_SEL0). A pullup resistor and a pulldown resistor of suggested values may be used to set the voltage ratio of the MODE_SEL[1:0] input and VDD33 to select one of the possible selected modes.
The DS90UB940N-Q1 is capable of operating in either 1-lane or 2-lane modes for FPD-Link III. By default, the FPD-Link III receiver automatically configures the input based on 1- or 2-lane mode operation. Programming the register 0x34 [4:3] settings overrides the automatic detection. For each FPD-Link III pair, the serial data stream is composed of a 35-bit symbol.
The DS90UB940N-Q1 recovers the FPD-Link III serial data stream(s) and produces CSI-2 TX data driven to the MIPI DPHY interface. There are two CSI-2 ports (CSI0_Dn and CSI1_Dn), and each consist of one clock lane and four data lanes. The DS90UB940N-Q1 supports two CSI-2 TX ports, and each may be configured to support either two or four CSI-2 data lanes. Unused CSI-2 outputs are driven to LP11 states. The MIPI DPHY transmission operates in both differential (HS) and single-ended (LP) modes. During HS transmission, the pair of outputs operates in differential mode, and in LP mode, the pair operates as two independent single-ended traces. Both the data and clock lanes enter LP mode during the horizontal and vertical blanking periods.
The configurations outlined in Figure 28 apply to DS90UB949-Q1, DS90UB947-Q1, DS90UB929-Q1, DS90UB925Q-Q1, DS90UB925AQ-Q1, and DS90UB927Q-Q1 FPD-Link III serializers.
The configurations outlined in Figure 29 apply to DS90UB949-Q1 and DS90UB947-Q1 FPD-Link III serializers.
The device can be configured in following modes: