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VLYNQ Port Registers
Table 8. Control Register (CTRL) Field Descriptions (continued)
Bit
Field
Value
Description
7
INT2CFG
Interrupt to configuration register. Determines which register is written with the status contained in
interrupt packets that are received over the serial interface. Always write 1 to this bit and configure
the interrupt pointer register to point to the interrupt pending/set register.
0
Bits[31:2] of the interrupt pointer register are used to point to a system interrupt register.
1
The least significant 8 bits of the interrupt pointer register are used to point to a VLYNQ module
local register (typically the interrupt pending/set register).
6-3
Reserved
0
Reserved. Always read as 0. Writes have no effect.
2
AOPTDISABLE
Address optimization disable.
0
Address optimization is enabled, eliminating unnecessary address bytes.
1
Address optimization is disabled.
1
ILOOP
Internal loop back.
0
Normal operation.
1
Serial transmit data is wrapped back to the serial receive data.
0
RESET
Software reset. It does not reset the VLYNQ MMR registers (except for the VLYNQ status register).
You have to reprogram the VLYNQ MMRs if they must have a different value after a software reset.
0
Normal operation.
1
All internal state machines are reset, the serial interface is disabled, and the link is lost.
28
VLYNQ Port
SPRUE36A – September 2007
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