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SC3

8 Serial Communication Channels, programmable RS-232/422/485 non-isolated

Serial Communication Module SC3 provides up to 8 high-speed, programmable RS-232, RS-422, RS-485, non-isolated communication channels. Each channel is programmable for either Serial Communications (SC) protocol or General Purpose I/O (GPIO) modes as either RS-422/485 (differential) or RS-232 (single ended) hardware level interfaces.

Each channel has one Transmit and one Receive signal pair (+/-) available as applicable. Synchronous (SYNC) communications mode (added feature) automatically configures the clock (clk) signal(s) on the companion pair channel: CH1-CH4 clk companion channels are CH5-CH8, respectively.

Features
  • Eight (8) high-speed, programmable RS-232, RS-422, RS-485, non-isolated communication channels
  • General Purpose Input/Output (GPIO) mode
  • Data transfers within two baud clocks for Async communications, 15 for Sync communications,
  • Digital Noise filtering on Receivers
  • A Receiver Enable/Disable function allows the user to turn selected receivers ON/OFF.
  • Note: SC3 (Rev B) product update includes the additional synchronous (SYNC) mode functionality. The SC3 SYNC mode and function capability is available for products identified with DOM > 1/2020, Mod-HW ≥ Rev. B and FPGA/Firmware ≥ Rev. 00001.00003.

Specifications
  • Number of Channels/Types: Eight (8) high-speed, programmable RS-232, RS-422, RS-485, non-isolated. Each channel is programmable for either Serial Communications (SC) protocol or General Purpose I/O (GPIO) modes as either RS-422, RS-485 (differential) or RS-232 (single ended) hardware level interfaces. Each channel has one Tx and one Rx signal pair (±) available as applicable.
  • Data Rate (SC Mode): RS422 and RS-485:1.5 Mbit/s for each channel in asynchronous differential mode (burst). RS-232: 250 KB/s. Data rate will be within 1% of commanded rate. Data can be read 4 µs after receipt in UART (typical bus transfer). These data rates are verified with all channels running simultaneously.
  • Data Transfer (SC Mode): Data transfers within 300 ns, no latency issues.
  • Receive/Transmit Buffers (SC Mode): Configurable Receive and Transmit buffers (up to 32 MB, aggregate).
  • Mode of Operation: RS-232: Single Ended, RS-422: Differential, RS-485: Differential
  • Number of Drivers & Receivers on one line max typ: RS-232: 1 driver and 1 receiver, RS-422: 1 driver and 10 receivers, RS-485: 32 drivers/receiver pairs.
  • Maximum Data Rate: RS-232: 250 kb/s, RS-422: 1.5 Mb/s, async or 10 Mb/s sync, RS-485: 1.5 Mb/s async or 10 Mb/s sync.
  • Driver Output Signal Level (Min Loaded): RS-232: ±5 V @ 3 kΩ load, RS-422: ±2 V @ 100 Ω load, RS-485: ±1.5 V @ 54 Ω load
  • Driver Load Impedance (Ohms): RS-232: 3k (min.), RS-422: 100, RS-485: 54
  • Max. Driver Current in High-Z State (Power On): RS-232: N/A, RS-422: N/A, RS-485: ±100 µA
  • Max. Driver Current in High-Z State (Power Off): RS-232: ±6 mA @ ±2 V, RS-422: ±100 µA, RS-485: 100 µA
  • Receiver Input Voltage Range: RS-232: ±15 V, RS-422: -10 V to +10 V, RS-485: -7 V to +12 V
  • Receiver Input Sensitivity:: RS-232: ±3 V, RS-422: ±200 mV RS-485: ±200 mV
  • Receiver Input Resistance (Typ.) (Ohms): RS-232: 5k (3k to 7k), RS-422: 125k (1/8 unit load) 120 (term enabled), RS-485: 125k (1/8 unit load) 120 (term enabled)
  • Power (Per 8-Channels): 5 VDC @ 200 mA, 360 mA fully loaded (54 Ω load per channel), (est.).
  • Ground: Signal common referenced to system (power) ground (non-isolated).
  • Weight: 1.5 oz. (42 g)
Block Diagram

Documentation
3/23/2020 10:16:43 AM
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