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Data Acquisition and
Control
IP-DIO-8506
48-bits Digital I/O Board
INDUSTRY PACK
INTRODUCTION
This is a single-width IP module with forty
eight channels of buffered digital input/output.
The I/O signals are accessed in groups of 16-bits. Each set of sixteen
signals can be selected to be inputs or outputs. At power-up or after an IP
reset, all signals default to the input state.
A control register associated with the I/O register determines whether each
group will act as inputs or outputs. It also controls the way that inputs
are sampled for input mode.
When output mode is selected, the output data reflects the last data written
to the corresponding I/O register. The buffered TTL outputs can be
programmed to be steady levels or pulses with positive true or false states.
When input mode is selected other control register bits come into play and
determine the sampling mode of the register. One common sampling clock can
be selected from a choice of four in the range 1kHz to 1MHz. Also, a common
de-bounce clock can be chosen from the following frequencies: 100Hz, 200Hz,
500Hz and 1kHz.
Writing to a group when input mode is selected has no effect.
Reading the group when output mode is selected will read back the last data
written.
A pulse parameter register determines the duration of pulsed outputs up to
100 seconds.
A further register associated with each group controls which bits may
generate an interrupt when in input mode. [Again, this function has no
effect when in output mode.]
All the above registers occupy I/O space on the IP card in three groups,
starting at offset zero+a (where a = 00, 10 or 20) as follows:
Offset Name Description
a+0 LKC Last Known Change/Data Register
a+2 CSR Control and Status Register
a+4 IMR Mask Register
a+6 DBR Debounce Register
a+8 PSR Pulse Select Register
a+A PPR Pulse Parameter Register
PRODUCT
SPECIFICATIONS
Size: Single width Industry Pack 1.8ins x 3.9 ins
Operating temp: 0 to 45 deg C ambient
Number of input/outputs: 48 (configurable as 3 groups of 16 in or 16 out )
Input level: TTL
Output level TTL 24mA, programmable logic sense high or low true
Input/output termination: 2k2 ohms to 0V or +3.3V by jumpered selection
Internal clock: 40MHz oscillator.
Clock accuracy: +/-100ppm (0.01%)
Power: +5V @ 250mA typical
3. OPERATING MODES
There are several basic operating modes set
according to the CSR (see below):-
The detailed
product literature is available for download.
HYTEC ELECTRONICS LTD
5 Cradock Road, Reading, Berkshire,
RG2 0JT, England.
Phone : +44 (0)118 9757770
Fax : +44 (0)118 9757566
Email : sales@hytec-electronics.co.uk |
