This page is in text format to simplify downloading it for reference. Please use a fixed-pitch font to view it. The XBar16 2.x chip is a complete, 16-port, Myrinet-SAN switch. All that a designer needs to know to use the XBar16 on a circuit board is what signal connects to each pin. Standard Myrinet-SAN connector pinouts are specified in the the ANSI/VITA 26-1998 Standard, which also provides design rules for handling the high-speed, low-voltage, controlled-impedance Myrinet-SAN signals. The use of the scan path is optional for the XBar16 2.x chips. Return to the documentation index for links to the scan-path documentation. ======================================================================== XBar16 pins/signals (names are not case-sensitive) GND 0V. VDD 2.5V +/- 5%, ~500mA max. LVDD 1.25V +/- 5%, ~250mA max. VTH connect to LVDD/2. We use two 4.99k 1% resistors, bypassed with one 0.027uF cap. BIAS connect through a 1.5k resistor to Vdd. This pin needs 1mA sourced into it. Its voltage, at 1mA, is about 1V. OAL tie through 50 ohms to LVdd (sets output impedance) OAH tie through 50 ohms to GND (sets output impedance) CREF connect to a 4MHz source CSLOW, CFAST sets channel speeds for "slow" and "fast" settings. We normally set CSLOW to 40MHz (160MB/sec), CFAST to 62.5MHz (250MB/sec), but other speeds are possible. AE "autonomous enable". If high when RST- goes high, the ports will default to autonomous mode. If low when RST- goes high, the ports will default to scanpath control. See scanpath documentation for more information. AHAE "autonomous HA enable". If high when RST- goes high, the ports will require BEATs and will shut off if illegal symbols are received in autonomous mode. This pin has no effect if autonomous mode is not enabled. See scanpath documentation for more information. RST- reset, active low. Should be held low for at least 1/4 second after power supplies are stable to ensure that the output impedence control circuitry has stabilized. SLAT-, SDI, SCLK inputs for the scanpath. See scanpath document for more information. SDO output for the scanpath. See scanpath document for more information. VP1, VP2 these pins are tied together internally. If one or more of CSLOW, CFAST, and CREF are 3.3V logic signals, VP1 and VP2 should be tied to 3.3V. If CSLOW, CFAST, and CREF are 2.5V logic signals, VP1 and VP2 should be tied to 2.5V. VP3, VP4 these pins are tied together internally. If one or more of RST-, AE, and AHAE are 3.3V logic signals, VP3 and VP should be tied to 3.3V. If RST-, AE, and AHAE are 2.5V logic signals, VP3 and VP4 should be tied to 2.5V VP5 If the serial link uses 3.3V logic signals, VP5 should be tied to 3.3V. If the serial link uses 2.5V logic signals, VP5 should be tied to 2.5V. VP5 sets the Vih(max) for SLAT- SDI, and SCLK, as well as Voh for SDO. X1, X2, X3, X4, X5 These pins should be tied to GND. The signal names for the 320 port signals, O{0, 1, ... 9, A, B, C, D, E, F}{0, 1, ... , 7, D, B} and I{0, 1, ... 9, A, B, C, D, E, F}{0, 1, ... , 7, D, B} (as defined also in the LANai specs) are formed as {Input or Output *signal*}{port number(hex)}{signal}. Please note that I00, I01, I02, I03, I04, I05, I06, I07, I0D, and O0B are for the port 0 input channel, and O00, O01, O02, O03, O04, O05, O06, O07, O0D, and I0B are for the port 0 output channel. All of these inputs have ~30Kohm pulldowns to GND so that unconnected (floating) inputs will be held low. ======================================================================== XBar16 2.x "Ballout" (432 BGA) A1 GND A2 CREF A3 O72 A4 GND A5 O7D A6 O64 A7 GND A8 O50 A9 O53 A10 GND A11 O57 A12 O40 A13 GND A14 O44 A15 O4D A16 GND A17 O32 A18 O36 A19 GND A20 O21 A21 O24 A22 GND A23 O2B A24 O12 A25 GND A26 O1D A27 O01 A28 GND A29 O07 A30 OAH A31 GND B1 X4 B2 GND B3 O70 B4 O74 B5 O77 B6 O60 B7 O63 B8 O67 B9 O6D B10 O51 B11 O54 B12 O5D B13 O41 B14 O43 B15 O47 B16 O31 B17 O33 B18 O37 B19 O3B B20 O22 B21 O26 B22 O2D B23 O11 B24 O14 B25 O16 B26 O00 B27 O03 B28 O04 B29 O0D B30 GND B31 IBIAS C1 I42 C2 I41 C3 CFAST C4 VP1 C5 O73 C6 O76 C7 O7B C8 O62 C9 O66 C10 O6B C11 O52 C12 O56 C13 O5B C14 O42 C15 O45 C16 O4B C17 O35 C18 O3D C19 O20 C20 O23 C21 O27 C22 O10 C23 O13 C24 O17 C25 O1B C26 O02 C27 O06 C28 OAL C29 X2 C30 I3B C31 I37 D1 GND D2 I45 D3 VP2 D4 CSLOW D5 O71 D6 O75 D7 LVDD D8 O61 D9 O65 D10 LVDD D11 LVDD D12 O55 D13 LVDD D14 LVDD D15 O46 D16 O30 D17 O34 D18 LVDD D19 LVDD D20 O25 D21 LVDD D22 LVDD D23 O15 D24 LVDD D25 LVDD D26 O05 D27 O0B D28 X1 D29 VTH D30 I35 D31 GND E1 I4D E2 I46 E3 I43 E4 I40 E28 I3D E29 I36 E30 I32 E31 I31 F1 I51 F2 I4B F3 I47 F4 I44 F28 I34 F29 I33 F30 I2B F31 I25 G1 GND G2 I53 G3 I50 G4 VDD G28 VDD G29 I30 G30 I26 G31 GND H1 I57 H2 I55 H3 I52 H4 VDD H28 I2D H29 I27 H30 I22 H31 I1B J1 I60 J2 I5D J3 I56 J4 I54 J28 I24 J29 I23 J30 I21 J31 I16 K1 GND K2 I61 K3 I5B K4 VDD K28 VDD K29 I20 K30 I1D K31 GND L1 I65 L2 I63 L3 I62 L4 VDD L28 VDD L29 I17 L30 I15 L31 I12 M1 I6D M2 I67 M3 I66 M4 I64 M28 I14 M29 I13 M30 I11 M31 I0B N1 GND N2 I70 N3 I6B N4 VDD N28 VDD N29 I10 N30 I0D N31 GND P1 I73 P2 I72 P3 I71 P4 VDD P28 VDD P29 I07 P30 I06 P31 I05 R1 I77 R2 I76 R3 I74 R4 I75 R28 I03 R29 I04 R30 I02 R31 I01 T1 GND T2 I7D T3 IF0 T4 I7B T28 I8B T29 I00 T30 I8D T31 GND U1 IF1 U2 IF2 U3 IF4 U4 IF3 U28 I85 U29 I84 U30 I86 U31 I87 V1 IF5 V2 IF6 V3 IF7 V4 VDD V28 VDD V29 I81 V30 I82 V31 I83 W1 GND W2 IFD W3 IE0 W4 VDD W28 VDD W29 I9B W30 I80 W31 GND Y1 IFB Y2 IE1 Y3 IE3 Y4 IE4 Y28 I94 Y29 I96 Y30 I97 Y31 I9D AA1 IE2 AA2 IE5 AA3 IE7 AA4 VDD AA28 VDD AA29 I92 AA30 I93 AA31 I95 AB1 GND AB2 IED AB3 ID0 AB4 VDD AB28 VDD AB29 IAB AB30 I91 AB31 GND AC1 IE6 AC2 ID1 AC3 ID3 AC4 ID4 AC28 IA4 AC29 IA6 AC30 IAD AC31 I90 AD1 IEB AD2 ID2 AD3 ID7 AD4 IDD AD28 VDD AD29 IA2 AD30 IA5 AD31 IA7 AE1 GND AE2 ID6 AE3 IC0 AE4 VDD AE28 VDD AE29 IA0 AE30 IA3 AE31 GND AF1 ID5 AF2 IDB AF3 IC3 AF4 IC4 AF28 IB4 AF29 IB7 AF30 IBB AF31 IA1 AG1 IC1 AG2 IC2 AG3 IC6 AG4 ICD AG28 IB0 AG29 IB3 AG30 IB6 AG31 IBD AH1 GND AH2 IC5 AH3 RST- AH4 VP3 AH5 OFB AH6 OF5 AH7 LVDD AH8 LVDD AH9 OE5 AH10 LVDD AH11 LVDD AH12 OD5 AH13 LVDD AH14 LVDD AH15 OC4 AH16 OC0 AH17 OB6 AH18 LVDD AH19 LVDD AH20 OA5 AH21 LVDD AH22 LVDD AH23 O95 AH24 O91 AH25 LVDD AH26 O85 AH27 O81 AH28 X5 AH29 SLAT- AH30 IB5 AH31 GND AJ1 IC7 AJ2 ICB AJ3 AE AJ4 VP4 AJ5 OF6 AJ6 OF2 AJ7 OEB AJ8 OE7 AJ9 OE3 AJ10 OE0 AJ11 OD7 AJ12 OD3 AJ13 OD0 AJ14 OCD AJ15 OC5 AJ16 OBB AJ17 OB5 AJ18 OB2 AJ19 OAB AJ20 OA6 AJ21 OA2 AJ22 O9B AJ23 O96 AJ24 O92 AJ25 O8B AJ26 O86 AJ27 O83 AJ28 VP5 AJ29 SCLK AJ30 IB1 AJ31 IB2 AK1 X3 AK2 GND AK3 OFD AK4 OF4 AK5 OF3 AK6 OF0 AK7 OE6 AK8 OE4 AK9 OE1 AK10 ODD AK11 OD6 AK12 OD2 AK13 OCB AK14 OC7 AK15 OC3 AK16 OC1 AK17 OB7 AK18 OB3 AK19 OB1 AK20 OAD AK21 OA4 AK22 OA1 AK23 O9D AK24 O97 AK25 O93 AK26 O90 AK27 O87 AK28 O84 AK29 O80 AK30 GND AK31 SDI AL1 GND AL2 AHAE AL3 OF7 AL4 GND AL5 OF1 AL6 OED AL7 GND AL8 OE2 AL9 ODB AL10 GND AL11 OD4 AL12 OD1 AL13 GND AL14 OC6 AL15 OC2 AL16 GND AL17 OBD AL18 OB4 AL19 GND AL20 OB0 AL21 OA7 AL22 GND AL23 OA3 AL24 OA0 AL25 GND AL26 O94 AL27 O8D AL28 GND AL29 O82 AL30 SDO AL31 GND [end]