Product Description
The DIO 8005 is a 6U (double height) VME64x
digital I/O board constructed to the VME64x standard. It provides 128 TTL
digital I/O bits organised in four groups of 32 bits each with an input and
an output strobe. Each group of 32 bits may be programmed to act as inputs
or outputs.
When a group is in ‘input mode’, the module
features change-of-state detection and contact de-bounce. A small FIFO
memory, one for each input group, allows a historical record of the
change-of-state input data to be stored; up to 64 samples. A further
register associated with each input group controls which bits may generate
an interrupt. This function has no effect when in output mode.
When a group is in ‘output mode’, outputs
may be programmed as levels or pulses of programmed duration. A pulse
parameter register determines the duration of pulsed outputs up to 100
seconds.
All the above registers occupy I/O space on
the card in four groups, starting at offset zero+a (where a = 000hex,
100hex, 200hex or 300hex) as follows:
Offset Name Description
a+0 LKC Last Known Change/Data Register
a+4 CSR Control and Status Register
a+8 IMR Mask Register
a+C DBR De-bounce Register
a+10 PSR Pulse Select Register
a+14 PPR Pulse Parameter Register
a+18 FIFO_R FIFO Register
a+1C LKC_FIFO FIFO Memory
a+20 IRV Interrupt Request Vector
