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ice:enclosure [2014/08/01 16:27] – [I/O] Michael Radunskyice:enclosure [2021/08/26 15:26] (current) – external edit 127.0.0.1
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 <tabcaption db9pindef| D-Sub 9 pin connector pin definitions.> <tabcaption db9pindef| D-Sub 9 pin connector pin definitions.>
 ^  **Pin**  ^  **Signal**  ^ ^  **Pin**  ^  **Signal**  ^
-|  1  |  GPIO1  | +|  1  |  EVENT_ADDR0  | 
-|  2  |  RXI_Serial  | +|  2  |  TX_Serial  | 
-|  3  |  TXO_Serial  |+|  3  |  RX_Serial  |
 |  4  |  5V In((leave unconnected if USB is also connected))  | |  4  |  5V In((leave unconnected if USB is also connected))  |
 |  5  |  Ground  | |  5  |  Ground  |
-|  6  |  GPIO2  |+|  6  |  EVENT_ADDR1  |
 |  7  |  No Connect  | |  7  |  No Connect  |
-|  8  |  GPIO3  | +|  8  |  EVENT_ADDR2  | 
-|  9  |  GPIO4  |+|  9  |  EVENT_Trigger  |
 </tabcaption> </tabcaption>
 </WRAP> </WRAP>
  
 == TTL Serial == == TTL Serial ==
-This provides a TTL (low-voltage) asynchronous serial interface (USART) to communicate with the ICE Platform. Note that this serial interface is **not** compatible with RS-232 signalling levels, as found on the COM ports of older PC's. The serial interface operates at 3.3V signalling levels, 115,200 Baud, 8N1 format (8 bit, no parity, 1 stop bit), and no flow control. Bus idle state is high (3.3V). The TXO (transmit out) and RXI (receive in) nomenclature is from the perspective of the device external to the Master Controller. TXO is for an external device transmitting data into the ICE Platform. RXI is for the ICE Platform sending data out to an external device. Either the TTL serial interface or USB can be used to receive commands, but **not** simultaneously (e.g. interleaved bytes).+This provides a LVTTL (low-voltage, 3.3V signalling) asynchronous serial interface (USART) to communicate with the ICE Platform. Note that this serial interface is **not** compatible with RS-232 signalling levels, as found on the COM ports of older PC's. The serial interface operates at 3.3V signalling levels, 115200 Baud, 8N1 format (8 bit, no parity, 1 stop bit), and no flow control. Bus idle state is high (3.3V). The TX (transmit out) and RX (receive in) nomenclature is from the perspective of the ICE Box. Either the TTL serial interface or USB can be used to receive commands, but **not** simultaneously (e.g. interleaved bytes).
 <WRAP center round important 60%> <WRAP center round important 60%>
-Either the TTL serial interface or USB can be used to receive commands, but **not** simultaneously (e.g. interleaved bytes).+Either the TTL serial interface or USB can be used to receive commands, but **not** simultaneously (e.g. interleaved bytes). Taking turns sending complete commands and responses is okay.
 </WRAP> </WRAP>
  
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 </WRAP> </WRAP>
  
-== GPIO == +== EVENT == 
-The GPIO pins are used for event system signalling. Voltage signalling is at 3.3V, active low. Pin definitions and usage is detailed in the [[ice:event_system|Event System]] section.+The EVENT pins are used for event system signalling. EVENT_ADDR0 is the least significant bit of the 3-bit event address. EVENT_TRIGGER is used to trigger the event. The state of the EVENT_ADDR pins will be read when on the rising edge of the EVENT_TRIGGER line. Voltage signalling is at 3.3V TTL, active high. Pin definitions and usage is detailed in the [[ice:event_system|Event System]] section.
 === Safety Interlock BNC === === Safety Interlock BNC ===
 The safety interlock signal prevents the Master Controller from releasing the safety interlocks on all attached daughter boards. The safety interlock is only applicable to daughter boards that have laser controllers. Without the safety interlocks released, daughter boards are prevented from powering on lasers. The safety interlock signal floats high to 3.3V and must be pulled down to ground to release the interlocks. It must be pulled to ground with less than 1kΩ of impedance. This pin can be permanently shorted directly to ground if safety interlock functionality is not required. The safety interlock signal prevents the Master Controller from releasing the safety interlocks on all attached daughter boards. The safety interlock is only applicable to daughter boards that have laser controllers. Without the safety interlocks released, daughter boards are prevented from powering on lasers. The safety interlock signal floats high to 3.3V and must be pulled down to ground to release the interlocks. It must be pulled to ground with less than 1kΩ of impedance. This pin can be permanently shorted directly to ground if safety interlock functionality is not required.
ice/enclosure.1406910452.txt.gz · Last modified: 2021/08/26 14:26 (external edit)