VSIO Digital Serial Interface Adapter Technical Specifications
AUDIO PORTS
| NOTE: Generator and Analyzer settings are independent NOTE: All clock and data signals are subject to a 24.576MHz maximum rate |
| DATA FORMAT | |
| Slots (channels) per frame (sample period): |
16 on one wire 8 on each of two wires 4 or 2 on each of four wires |
| Slot length: | 8, 16, 24 or 32 bits |
| Audio wordlength: | 8..24 bits |
| Audio alignment: | any position in slot, optional sign extension |
| Orientation: | MSB or LSB first |
| ROUTING | |
| Output slots: | all routable from Generator A or B channel, or OFF |
| Input slots: | any two routable to Analyzer A or B channel |
| CLOCKING | |
| Sample rates: | 32, 44.1, 48, 88.2, 96, 176.4 or 192kHz |
| Sync source: | dScope, EUT(SCK/LRCK) or EUT(MCK) |
| SCK and LRCK: | input or output, programmable polarities |
| LRCK format: | wordclock/one-bit, early/normal |
| MCK: | input, output or OFF, rate: 64, 128, 192, 256, 384 or 512fs |
| RAIL VOLTAGE |
| 1.8V, 2.5V, 3.3V, 5V (TTL or CMOS threshold) |
CONTROL PORT
| BIT RATE | |
| I2C mode: | 86.4kbps |
| SPI mode: | 86.4kbps |
| RAIL VOLTAGE |
| 1.8V, 2.5V, 3.3V, 5V (TTL or CMOS threshold) Note: I2C pins have 3k3 pull-up resistors fitted internally |
| MAXIMUM RATINGS | |
| NOTE: These ratings apply to both audio and control ports and are those beyond which device damage may occur. Correct operation of the VSIO Adapter is not implied over the entire range of these limits. | |
| Maximum voltage applied to input pins: | -0.5V to selected rail voltage + 0.5V |
| Minimum load applied to output pins: | 0R indefinitely |
| Maximum forced current at output pins: | 10mA |
| UNIT CONTROL | |
| The dS-NET VSIO Adapter is part of the dS-NET family of peripherals for the dScope Series III and is controlled directly from the dScope Series III. | |
| dScope Software Version | 1.11 and later |
| Connections: | 2 x male 9-way D-Sub for dS-NET upstream and downstream connections |
| Addressing: | The dS-NET address of the device is set by DIP switches on the rear panel. |
| Number of simultaneous units: | Up to 64 dS-NET devices can be addressed on one bus. |
| Direct PC Control: | The dS-NET VSIO Adapter can also be controlled directly from a PC using either RS232 or RS485 (selectable by jumpers internally) using the dS-NET protocol. |
| PHYSICAL | |
| The dS-NET VSIO Adapter is a 1u 19" rack mounting component with removable rack ears and removable feet. | |
| Mains Power inlet: | IEC inlet with integral switch plus voltage selector |
| Mains Voltage: | 100 - 120V AC or 220 - 240V AC at 47 - 63Hz user selectable. |
| Power consumption: | approx 15W |
| Weight: | 3.5kg net, 5kg packed |
| SUPPLIED ACCESSORIES | |
| IEC mains lead | x 1 |
| RS232 9-pin null modem lead | x 1 |
| 15 way data cable header | x 2 |
| 9 way data cable header | x 1 |
| 15 way extender (1m) | x 2 |
| 9 way extender (1m) | x 1 |
| Probe hooks | x 21 |
| AES3 XLR cables M-F 1m | x 3 |
Specifications subject to amendment.
ARCHITECTURE
The VSIO Adapter comprises three main sections. All of these are
controlled via dS-NET, but in other respects their operation is almost
entirely independent. This means that the three parts may be used
together or in isolation. The Generator section (at
the bottom of the diagram) takes an AES3 audio input from the dScope's
Signal Generator (from its XLR Digital Output) and transmits the audio
data to the EUT as a serial multiplex. The Analyzer
section (above the Generator) takes serial audio multiplex data from
the EUT and converts it to AES3 for transmission to the dScope's Signal
Analyzer, through its XLR Digital Input. The Control
section (top left) is a serial controller for the EUT, which allows the
user to send control data and monitor status returns in either I2C or
SPI format.
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