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DS125BR401ANJYR Datasheet(PDF) 5 Page - Texas Instruments |
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DS125BR401ANJYR Datasheet(HTML) 5 Page - Texas Instruments |
5 / 52 page DS125BR401A www.ti.com SNLS466A – SEPTEMBER 2013 – REVISED MARCH 2014 Terminal Functions(1) (continued) TERMINAL TERMINAL NAME I/O, TYPE TERMINAL DESCRIPTION NUMBER DEMA0, DEMA1 49, 50 I, 4-LEVEL, DEMA[1:0] controls the CHA output amplitude. The Terminals are LVCMOS defined as DEMA[1:0] only when ENSMB is de-asserted (low). Each of the 4 A channels have the same level unless controlled by the SMBus control registers. When ENSMB goes high the SMBus registers provide independent control of each lane and the DEMA[1:0] Terminals are converted to SCL and SDA. See Table 7. SD_TH 26 I, 4-LEVEL, Controls the internal Signal Detect Threshold on the INB-OUTB LVCMOS Channels. For CHB, the signal detect is used to bring the output into and out of IDLE. This allows the OOB signaling to pass with minimal distortion. See Table 3. CONTROL TERMINALS — BOTH TERMINAL AND SMBus MODES (LVCMOS) RXDET 22 I, 4-LEVEL, The RXDET Terminal controls the receiver detect function. Depending on LVCMOS the input level, a 50 Ω or >50KΩ termination to the power rail is enabled. In SAS/SATA system RXDET should be set to a Logic "1" state to keep the termination always enabled. See Table 2. RES 23 I, 4-LEVEL, Reserved: LVCMOS This input must be left Floating. VDD_SEL 25 I, FLOAT Controls the internal regulator Float = 2.5V mode Tie GND = 3.3V mode PWDN 52 I, LVCMOS Tie High = Low power - power down Tie GND = Normal Operation See Table 2. ALL_DONE 27 O, LVCMOS Valid Register Load Status Output HIGH = External EEPROM load failed or incomplete LOW = External EEPROM load passed POWER VIN 24 Power In 3.3V mode, feed 3.3V to VIN In 2.5V mode, leave floating. VDD 9, 14,36, 41, 51 Power Power supply Terminals CML/analog 2.5V mode, connect to 2.5V 3.3V mode, connect 0.1 µF cap to each VDD Terminal and GND GND DAP Power Ground pad (DAP - die attach pad). Copyright © 2013–2014, Texas Instruments Incorporated Submit Documentation Feedback 5 Product Folder Links: DS125BR401A |
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