SERIES IP1K100 INDUSTRIAL I/O PACK RECONFIGURABLE DIGITAL I/O MODULE
___________________________________________________________________________________________
- 9 -
Input/Output Registers
(Read/Write) - (Base + 02H to 07H)
Fourty-eight possible input/output channels numbered 0 through
47 may be individually accessed via these registers. The
Input/Output Channel registers are used to monitor/read or set/write
channels 0 through 47. The first eight channels are accessed at the
carrier base a03H via the low data byte. The next eight
channels are accessed at the carrier base a02H via the
high data byte. The remaining 32 channels are accessed similarily
at the carrier base a offsets shown in Table 3.3.
If the Input/Output port is to be selected as an output, you
should first set the output register bit as desired before setting the
Direction Control register. Note; if you select as output before
setting this Input/Output register, the output will be logic low as this
is the power-up/reset state of the output register bits.
Table 3.4 shows all channels and their corresponding I/O data
register bit for each of the IP1K100 models.
The register bits not listed will not be used. See the memory map to
identify the addresses required to control I/O registers.
Table 3.4: Input/Output Registers
Used Input/Output Channel Register Bits
Model
I/O Register Bits
See Table 2.1 for Pin Assignments
IP1K100-0024
Differential/RS485 Channels
±
0 to
±
23
Register Bits 0 to 23
IP1K100-2412
Differential /RS485
Channels
±
12 to
±
23
Register Bits 32 to 43
TTL Channels
0 to 23
Register Bits 0 to 23
IP1K100-4800
TTL Channels 0 to 47
Register Bits 0 to 47
Channel read/write operations use 8-bit, or 16-bit data transfers
with the lower ordered bits corresponding to the lower-numbered
channels for the register of interest. All input/output channels are
configured as inputs on a power-on or software reset. The unused
upper bits of these registers will always read low (0’s).
Direction Control Register (Read/Write) - (Base + 08H and 09H)
The data direction (input or output), of the digital I/O channels, is selected via this register. The data direction of all differential channels are set
as a group of two or four channels while data direction of all TTL channels is controlled as a group of 8 channels. Setting a bit high configures the
data direction, for the identified channels, as output. Setting the control bit low configures the corresponding channel’s data direction for input.
The default power-up state of these registers is logic low. Thus, all channels are configured as inputs on system reset or power-up. The
unused upper nibble (D15 to D12) of the register at base a 08H will always read low (0’s). All not used bits will also read low. See Table
2.1 for field I/O pin assignments corresponding to each of the RS485 and TTL channels listed below.
Direction Control Register
Model
D11
D10
D09
D08
D07
D06
D05
D04
D03
D02
D01
D00
IP1K100-0024
Not
Used
Not
Used
Not
Used
Not
Used
Not
Used
Not
Used
Ch 10,
11, 22,
23
Ch 8,9,
20, 21
Ch 6, 7
18, 19
Ch 4,5,
16, 17
Ch 2,3,
14,15
Ch 0,1,
12, 13
IP1K100-2412
Not
Used
Not
Used
Not
Used
TTL
Ch 16-
Ch 23
TTL
Ch 8-
Ch 15
TTL
Ch 0-
Ch 7
Ch 22
Ch 23
Ch 20
Ch 21
Ch 18
Ch 19
Ch 16
Ch 17
Ch 14
Ch 15
Ch 12
Ch 13
IP1K100-4800
TTL
Ch 40-
Ch 47
TTL
Ch 32-
Ch 39
TTL
Ch 24-
Ch 31
TTL
Ch 16-
Ch 23
TTL
Ch 8-
Ch 15
TTL
Ch 0-
Ch 7
Not
Used
Not
Used
Not
Used
Not
Used
Not
Used
Not
Used
Interrupt Enable Registers (Read/Write) - (Base + 0BH)
The Interrupt Enable Registers provide a mask bit for the first 8
channels. A “0” bit will prevent the corresponding input channel
from generating an external interrupt. A “1” bit will allow the
corresponding input channel to generate an interrupt. Only those
channels enabled for interrupts can generate interrupts. Interrupts
are only available on the first eight channels.
Interrupt Enable Register
MSB
LSB
Data
Bit
07
Data
Bit
06
Data
Bit
05
Data
Bit
04
Data
Bit
03
Data
Bit
02
Data
Bit
01
Data
Bit
00
Ch07
Ch06
Ch05
Ch04
Ch03
Ch02
Ch01
Ch00
The Interrupt Enable register at the carrier’s base a
offset 0BH is used to control channels 00 through 07. For example,
channel 00 is controlled via data bit-0 as seen in the prior table.
Channel read operations use 8-bit, or 16-bit data transfers. The
upper 8 bits of this register are “Not Used” and will always read low
(0’s) for D16 accesses.
All input channel interrupts are disabled (set to “0”) following a
power-on or software reset.
Interrupt Type (COS or H/L) Configuration Registers
(Read/Write) - (Base + 0DH)
The Interrupt Type Configuration Registers determine the type
of input channel transition that will generate an interrupt for each of
the 8 possible interrupting channels. A “0” bit selects interrupt on
level. An interrupt will be generated when the input channel level
