hi-6131pqtf QuickLogic Corp, hi-6131pqtf Datasheet - Page 157

• Manufacturer Part Number: hi-6131pqtf
• Description: Mil-std-1553 / Mil-std-1760 3.3v Bc / Mt / Rt Multi-terminal Device
• Manufacturer: QuickLogic Corp

Bit No.
2 − 0
8
7
6
5
4
3
Mnemonic
RT1MC8
IXEQZ1
ILCMD1
IBR1
MERR1
IWA1
Reserved
Function
RT1 Mode Code 8 Command Interrupt.
Remote terminal RT1 processed a valid MIL-STD-1553 “reset remote terminal” mode
code command. An RTxMC8 interrupt notifies the host when the Bus Controller
commands remote terminal reset.
The state of bit 0 in the RT1 Remote Terminal Configuration Register 0x0017
determines whether the mode code response is automatic or handled by the host. If
the RT1MC8 bit is reset in the RT Interrupt Enable register when RT1 decodes a valid
“reset remote terminal” mode command, bit 0 in the RT1 Remote Terminal Configuration
Register dictates whether the reset response is automatic, or host controlled. The event
does not affect the RT Pending Interrupt Register, the Interrupt Log or the nIRQ output,
but the nRT1MC8 output pin is asserted to indicate that RT1 needs reset. In the case of
a broadcast command to RT31, both MC8 pins will be asserted.
RT1 Index Equals Zero Interrupt.
The “index equals zero” (IXEQZ) interrupt for RT1. Index counts are used in multi-
message bulk data transfers. “Index equals zero” occurs when the last expected
message was transacted.
Defined IXEQZ interrupt events comprise: (a) subaddresses using indexed buffer mode
when the index decrements from 1 to 0, or (b) subaddresses using circular buffer modes
when the pre-determined number of messages has been transacted.
RT1 Illegal Command Interrupt.
The Remote Terminal 2 encountered a valid illegal message, as defined in the RT1
Illegal Command Table.
Illegal commands are detected when a new valid command word is decoded and the
RT1 Illegalization Table bit corresponding to the received command is logic 1. (Table
bits are logic 0 for legal commands.) The RT1 Illegalization Table contains nonzero
values only when “illegal command detection” is being applied. When illegal commands
are received, RT1 responds by transmitting a status word with ME “message error” flag
set; no data words are transmitted.
If the ILCMD2 bit is reset in the RT Interrupt Enable Register when a valid illegal
command is decoded, the event does not affect the RT Pending Interrupt Register, the
Interrupt Log or the IRQ output.
RT1 Broadcast Command Received Interrupt.
Broadcast commands are enabled for Remote Terminal 1 and the terminal encountered
a valid command addressed to RT31, the broadcast command address.
RT1 Message Error Status Interrupt.
The Remote Terminal 1 set its Message Error status flag while processing a valid MIL-
STD-1553 message. Message errors are caused by Manchester encoding problems or
protocol errors.
RT1 Interrupt When Accessed.
The Remote Terminal 1 processed a valid MIL-STD-1553 command having the IWA
interrupt enabled in its RT1 Descriptor Table entry. IWA interrupts are used to notify
the host each time certain command words are encountered.
Bits 2-0 cannot be written, and read back 000.
HOLT INTEGRATED CIRCUITS
HI-6130, HI-6131
157