GE VMIVME-2510B 64-bit TTL Digital I/O

GE VMIVME-2510B 64-bit TTL Digital I/O

INFORMATION TTL I/O

This board may be ordered  with positive or negative true I/O options. A positive true  input option presents a high-level input voltage on each data  line whose corresponding bit on the VMEbus is a logic one.  A positive true output option presents a logic one to the  Output Data Register (ODR) which presents a high-level  output voltage on each data line. A negative true input  option presents a high-level input voltage on each data line  whose corresponding bit on the VMEbus is a logic zero. A  negative true output option presents a logic zero to the  Output Data Register which presents a high-level output  voltage on each data line.

FUNCTIONAL CHARACTERISTICS

Compatibility: VMEbus specification compatible  double-height form factor

I/O Connector Type: Dual 64-pin connector, DIN  41612

I/O Organization: Eight I/O ports; eight bits wide.  Addressable to any address within short supervisory or  short nonprivileged I/O map.

Addressing Scheme: Eight ports individually  addressable on 8- or 16-bit boundaries. Address DIP  switches provide unlimited short data I/O address map  selection.

Built-in-Test: Output data may be read back in  real-time or in an off-line mode. The off-line mode is  enabled by executing a write to the Control and Status  Register (CSR) to set the TEST MODE bits. With the  TEST MODE enabled, all outputs are in TRI-STATE.  Two TEST MODE bits are provided so that each  connector I/O (32 bits) can be tested independently if  necessary.

Fail LED: A Fail LED is provided that is illuminated  at power up and system reset. It may be extinguished  under program control upon a successful diagnostic  execution.

I/O Circuit: Transceivers support high current sink (64  mA) outputs. These octal bus transceivers are  SN74AS645 for the logic level TTL I/O option. The  open-collector option uses SN74AS641 type  transceivers. If the open-collector option is ordered, all  64 bits are output only.

FEATURES

• The direction of each 8-bit port is individually programmable 

• 64 mA sink capability 

• Separate board address decoding for control and data registers 

• Built-in-Test logic for fault detection and isolation 

• Fail LED 

• Compatible with VMIC’s Intelligent I/O Controller product line 

• High reliability DIN-type I/O connections 

• 8-, 16-, 32-bit transfers 

• Optional open-collector outputs

PHYSICAL/ENVIRONMENTAL

Temperature Range:0 to 55 °C, operating -20 to 85 °C, storage

Relative Humidity Range:20 to 80 percent,  noncondensing

Cooling: Convection

Power Requirements: +5 V at 3.786 A (maximum)

OPEN-COLLECTOR OUTPUT OPTION

A  positive true output option presents a logic one to the ODR  whose corresponding bit on the VMEbus is a logic one,  which turns the output open-collector transistor ON,  thereby supplying a ground to the load.

A negative true output option presents a logic zero to  the ODR whose corresponding bit on the VMEbus is a logic  one, which turns the open-collector output transistor OFF.