Chapter 2
Module Operation
DAS-429PCI/Mx: User’s Manual
page 2 - 9
Read/Write
The Channel Interrupt register indicates which channel issued the interrupt
(1 = Active). Reset the status bits by writing to this register or to the reset
register.
Write
The Receiver Data Storage Mode register is used to select the Receiver Data
Storage Mode and the Merge Mode option. ARINC-429 data words can be stored
with Time Tag and Status words appended to the data block or they can be
stored without these additional words. Set bit 00 to a logic 0 to select the
standard mode which appends both Time Tag and Status Words to each ARINC-
429 word stored in memory. Set register bit 00 to a logic 1 to select
Data Only mode.
Bit 01 controls the Receiver Merge Mode selection. A logic 0 selects the standard
independent mode which utilizes different receive buffer areas for each receive
channel. A logic 1 selects the
Merge Mode
which utilizes a single receiver buffer for
all channels. Each Receive Status Word, in this case, is tagged with Channel
Code information. The Merge Module Control registers are used only when the
Merge Mode option is selected (See
Receiver Merge Mode Control Registers,
page 2-11).
Note:
1. If Data Only Storage Mode is selected (bit 00 set to 1), storage will be
per independent channel regardless of the state of bit 01.
2. Data Only Storage Mode is not available in Lookup Table Mode.
3. The Receiver Data Storage Mode register can only be changed when all
channels are turned off (Start/Stop register = 0).
4. Merge mode merges the 4 receive channels in each bank.
2.4.4
Channel Interrupt Register
Address:
0016 (H)
Bit
Bit Name
06-15
Reserved
05
Channel 5 Interrupt Bit
04
Channel 4 Interrupt Bit
03
Channel 3 Interrupt Bit
02
Channel 2 Interrupt Bit
01
Channel 1 Interrupt Bit
00
Channel 0 Interrupt Bit
Channel Interrupt Register
2.4.5
Receiver Data Storage Mode Register
Address:
0018 (H)
Bit
Description
02-15
0
01
Merge Mode Option
0 = Independent Mode
1 = Merge Mode
00
Receive Data Storage Mode
0 = Standard Mode
1 = Store Only Data
Receiver Data Storage Mode Register
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