User's Manual
5. I/O Registers
5.1 PCMCIA Interface
The information in this section is provided for those who need low level PCMCIA interface
details for the DAQP card. The client driver or enabler that comes with the DAQP card will be
sufficient for most applications.
The DAQP card performs data acquisition for all host computers equipped with a version 2.10
compliant PCMCIA interface. The DAQP card has a form factor of type II (5 mm thick). The
card is highly flexible with respect to addressing and interrupt level use. It can be configured
either as a memory only interface or as an I/O interface and can be powered up or down with
the help of PCMCIA card and socket services. The DAQP card provides a single interrupt that
can be routed to any system interrupt via the PCMCIA socket controller.
There are two sets of registers on the DAQP card: the program registers and the configuration
registers.
Program registers fall under program control and belong to the DAQP card. The I/O location
of these registers is controlled by the PCMCIA socket configuration and by the contents of the
PCMCIA configuration registers.
The configuration registers are as those defined in the PCMCIA 2.10 specification and are
located in the DAQP card’s configuration space at offset 8000H. The configuration space also
contains the Card Information Structure (CIS) which is located at offset 0000H. The CIS
memory contains information about the DAQP card as defined by the PCMCIA 2.10
specification. It is recommended that configuration and power up/down control of the DAQP
card be carried out through the standard card and socket services although an enabler can be
used to complete these tasks.
Two PCMCIA configuration registers are supported by the DAQP card, (see Table 5-1): the
Configuration Option Register and the Card Configuration and Status Register.
Table 5-1. PCMCIA Configuration Registers
Card Configuration and Status Register
R/
W
0x8002
Configuration Option Register
R/W
0x8000
DescriptionAccessOffset
DAQP-208/208H/308 Users Manual 37