The VXI Technology VM6068-1 is a 4-channel serial interface module for VXIbus systems, delivering programmable multi-protocol support and up to 5 Mbaud serial data rates. Operating as a single-wide C-size card within the VMIP™ family, this module combines RS-232, RS-422, RS-423, RS-449, RS-485, V.35, and EIA-530 interface capability with UART and HDLC/SDLC protocol support. Each module provides 4 MB of on-board buffer memory (1 MB per channel) and leverages the Motorola MC68360 QUICC controller for signal management. VXIbus register access delivers 25 µs transfer rates per 8-bit character, enabling real-time UART data up to 400 kb/s and HDLC frame rates to 323.2 kb/s across the backplane. Fully SCPI compatible with VXIplug&play drivers included, the VM6068-1 scales to 12 channels per card through multi-module configuration and integrates with other VMIP™ instruments to reduce footprint and system cost.
Technical Specifications
Serial Channels & Protocols
• 4 independent serial channels per module
• Universal Asynchronous Receiver/Transmitter (UART)
• High-Level Data Link Control (HDLC) / Synchronous Data Link Control (SDLC)
• Maximum serial data rate: 5 Mbaud
Memory & Control
• On-board buffer: 4 MB per four channels (1 MB per channel)
• Controller: Motorola MC68360 QUICC per channel group
Interface Standards
• RS-232, RS-422, RS-423, RS-449, RS-485, V.35, EIA-530 programmable support
VXIbus Performance
• Register access: 25 µs per 8-bit character
• UART mode maximum: 400 kb/s real-time over VXIbus
• HDLC mode maximum: 323.2 kb/s for 400-byte frames
Electrical (RS-485 Example)
• Output voltage: +6.0 V max. / -0.3 V min.
• Differential output: ±1.5 V min. to ±5.0 V max. (RL = 54 Ω, CL = 50 pF)
• Transition time: 120 ns max.
– Key Features
• Programmable configuration eliminates manual switch settings
• Scales to 12 channels via multi-module stacking
• SCPI compatible with included VXIplug&play drivers
• High-speed data capture with integrated memory per channel
– Compatibility & Integration
Combines with other VMIP™ family modules to create integrated multi-function instruments, reducing system complexity and cost.
