SERIES AP471 ACROPACK
USER
’S MANUAL
Acromag, Inc. Tel: 248-295-0310
- 19 -
http://www.acromag.com
- 19 -
www.acromag.com
Module Location In System Register (Read Only)
(BAR0 + 0x0000 0004)
This read only register is used identify the module’s plugin location in a
system.
Table 3.4 Location Register
Note that any registers/bits not
mentioned will remain at the
default value logic low.
Bit(s)
FUNCTION
2 to 0
Module Site Location Bits. These bits identify the location on
the carrier of the AP module.
000
Carrier Site A
001
Carrier Site B
010
Carrier Site C
011
Carrier Site D
7 to 3
Module Slot Location Bits. These bits identify the slot location
of the AP module in a system. The Carrier may use backplane
signals as in a VPX system or an on-carrier DIP switch to
uniquely identify the system location of the carrier.
XXXXX
System Slot identification bits are described by the
AcroPack carrier card.
31 to 8 Not Used
I/O Registers (Read/Write)
(BAR0 + 0x0000 0008 –
0x0000 0010)
Three registers are provided to control/monitor 48 possible I/O points. Data
is read from or written to one of three groups of sixteen I/O lines, as
designated by the address and read and write signals. A read of this register
returns the status (ON/OFF) of the I/O point. A write to this register controls
the state of the open-drain output (low level true). Bit 0 of each register
corresponds to the lowest numbered I/O point, while Bit 15 corresponds to
the highest numbered I/O point. The Mask Register is used to disable writes
to I/O points designated as input channels. That is, when a line is used as an
input channel, writes to this channel must be blocked (masked) to prevent
contention between the output circuitry and any external device driving this
input line.
Outputs are configured as open-drain with resistive pull-ups installed. Thus,
on power-up or reset, the I/O registers are reset to 0, forcing the outputs to
be set high (OFF).
