Transmit Interval

The KMXF_A629_MODULE_TI attribute holds the transmit interval of the module. The attribute value is expressed according to the current timebase (microseconds or nanoseconds) and by steps of 500 microseconds. See Transmit Interval.

Range	Value (μs)
Minimum	500
Maximum	64000

Default value: 25 ms

Synchronization Gap

The KMXF_A629_MODULE_SG attribute holds the synchronization gap of the module. The SG should be chosen to be longer than the maximum length Terminal Gap. See Synchronization Gap.

Constant	Value
VMXF_A629_MODULE_SG_16	SG of 16 (17.7 μs)
VMXF_A629_MODULE_SG_32	SG of 32 (33.7 μs)
VMXF_A629_MODULE_SG_64	SG of 64 (65.7 μs)
VMXF_A629_MODULE_SG_127	SG of 127 (127.7 μs) (default)

Interface

The KMXF_A629_MODULE_INTERFACE attribute holds the module interface, either SIM (Serial Interface Module) or TTL.

Constant	Value
VMXF_A629_MODULE_INTERFACE_SIM	SIM interface (default)
VMXF_A629_MODULE_INTERFACE_TTL	Pseudo-bus interface

RX only

The KMXF_A629_MODULE_RX_ONLY attribute holds the module RX only enable state. When enabled, this will prevent any transmission to occur.

In MXF 4.1.0 and later, this attribute returns the state of the software RX only attribute ORed with the A629 Tx Inhibit Key state at the back of the FM629 device. The A629 Tx Inhibit Key acts like a sticky bit register, meaning that if the key has been turned to inhibit transmission (RX only enable), the transmission will be disabled until this attribute is set to Disable RX only, even if the key has been turned back to allow transmission.

If a frame is started when in RX only mode, error MAXT_ERROR_BAD_TERM_MODE will be returned by mxfTxPeriodicMajorFrameStart(). If the A629 Tx Inhibit key is turned to disable transmission while a frame is running, the frame will be halted, the status bit MXF_TXPERIODIC_MJRFRAME_STATUS_HALTED will be set and the txHalted statistic incremented.

Constant	Value
VMXF_DISABLE	Disable RX only (default)
VMXF_ENABLE	Enable RX only

XPP CID Enable

The KMXF_A629_MODULE_XPP_CID_ENABLE attribute holds the module XPP CID enable state. This attribute allows using the CID of each label configured in each XPP cell. The default CID is ignored for transmission. This feature allows doing an error injection. However, the default CID is used for the CRC calculation. The supported values are:

Constant	Value
VMXF_DISABLE	Disable XPP CID (default)
VMXF_ENABLE	Enable XPP CID

Note: This attribute is meant to ease the upgrade path from older A629-BP1 product. With A629-MRT, it is best to not use this feature and instead define an XPP for each CID by using a different RT channel.

XPP DUAL Enable

The KMXF_A629_MODULE_XPP_DUAL_ENABLE attribute holds the module XPP Dual enable state. When this attribute is disabled, the module has 120 RTs (or XPPs). However, once the “DUAL XPP” mode is enabled, the available simultaneous RT is down to 60. The RT number from 60 to 119 are the second XPP for RT 0 to 59. So each DUAL XPP (ex. RT 0 and 60) can have a different configuration (TG, CID, etc). Then, when a “RT XPP switch” is called, the module processing would point to the other XPP configuration without affecting the on going scheduling. The supported values are:

Constant	Value
VMXF_DISABLE	Disable XPP Dual (default)
VMXF_ENABLE	Enable XPP Dual

XPP FIFO Aging timeout

The KMXF_A629_MODULE_XPP_FIFO_AGING attribute holds aging timeout for the module XPP FIFO. The aging timeout is used to prevent the stagnation of received events when the almost full threshold is not reached. Programming a value of “0” disables the maximum aging surveillance process. The attribute value is expressed according to the current timebase (microseconds or nanoseconds) and by steps of 64 microseconds. The supported range is:

Range	Value (μs)
Minimum	0
Maximum	16320

Default value: 1024 μs

Note: MX Foundation takes care of initializing this attribute using the optimal value. It is not recommended to change to this attribute unless told to do so by a MAX Technologies' support engineer.

XPP FIFO Almost Full Threshold

The KMXF_A629_MODULE_XPP_FIFO_AF attribute holds the number of 16-bit words of the almost full (AF) XPP FIFO. The supported range is:

Range	Value
Minimum	1 (default)
Maximum	63

Note: MX Foundation takes care of initializing this attribute using the optimal value. It is not recommended to change to this attribute unless told to do so by a MAX Technologies' support engineer.

BM FIFO Aging timeout

The KMXF_A629_MODULE_BM_FIFO_AGING attribute holds aging timeout for BM FIFO. The aging timeout is used to prevent the stagnation of received events when the almost full threshold is not reached. Programming a value of “0” disables the maximum aging surveillance process. The attribute value is expressed according to the current timebase (microseconds or nanoseconds) and by steps of 64 microseconds. The supported range is:

Range	Value (μs)
Minimum	0
Maximum	16320

Default value: 1024 μs

Note: MX Foundation takes care of initializing this attribute using the optimal value. It is not recommended to change to this attribute unless told to do so by a MAX Technologies' support engineer.

BM FIFO Almost Full Threshold

The KMXF_A629_MODULE_BM_FIFO_AF attribute holds the number of 16-bit words of the almost full (AF) BM FIFO. The supported range is:

Range	Value
Minimum	1
Maximum	2047

Default value: 32

Note: MX Foundation takes care of initializing this attribute using the optimal value. It is not recommended to change to this attribute unless told to do so by a MAX Technologies' support engineer.

Tx Aperiodic Mode

The KMXF_A629_MODULE_APERIODIC_MODE attribute holds the module Tx Aperiodic Mode enable state. When enabled, the transmission is not based on the A629 timers (TI, SG and TG) but controlled by the application. There are limitations to keep in mind when using this mode. See Aperiodic Mode section for more details.

This mode should be used only for special test cases.

Note: Only available on FM629.

Constant	Value
VMXF_DISABLE	Disable Tx Aperiodic Mode (default)
VMXF_ENABLE	Enable Tx Aperiodic Mode

Speed

The KMXF_A629_MODULE_SPEED attribute holds the module Speed.

Note: Only available on FM629-2-DU and FM629-4-DU.

Constant	Value
VMXF_A629_MODULE_SPEED_2MBPS	2 Mbps (default)
VMXF_A629_MODULE_SPEED_8MBPS	8 Mbps