Features and Functions | 3 |
USB Backplane
Figure 3- 1 illustrates the 55- pin assignment of the backplane connector pin.
11 | GND | +12V | +12V | GND | USB_D+ | USB_D- | GND |
10 | GND | +12V | +12V | +12V | GND | GND | GND |
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9 | GND | +12V | +12V | +12V | GND | USB_VBUS | GND |
8 | GND | LBL0 | BRSV | GND | TRIG0 | LBR0 | GND |
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7 | GND | LBL1 | GA0 | TRIG7 | GND | LBR1 | GND |
6 | GND | LBL2 | GA1 | GND | TRIG1 | LBR2 | GND |
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5 | GND | LBL3 | GA2 | TRIG6 | GND | LBR3 | GND |
4 | GND | LBL4 | STAR TRIG | GND | TRIG2 | LBR4 | GND |
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3 | GND | LBL5 | GND | TRIG5 | GND | LBR5 | GND |
2 | GND | LBL6 | CLK10M | GND | TRIG3 | LBR6 | GND |
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1 | GND | LBL7 | GND | TRIG4 | GND | LBR7 | GND |
| Z | A | B | C | D | E | F |
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Figure3-1 55-pin backplane connector pin assignment
Table 3-1 Pin information of SSI connector
SSI timing signal | Functionality |
+12V | +12 V power from backplane |
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GND | Ground |
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BRSV | Reserved pin |
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TRIG0~TRIG7 | Trigger bus 0 ~ 7 |
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STAR_TRIG | Star trigger |
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CLK10M | 10MHz reference clock |
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USB_VBUS | USB bus power, +5 V |
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USB_D+, USB_D- | USB differential pair |
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LBL <0..7> and LBR <0..7> | Reserved pin |
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GA0, GA1, GA2 | Geographical address pin |
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U2781A User’s Guide | 29 |
