hi-6131pqtf QuickLogic Corp, hi-6131pqtf Datasheet - Page 50

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

10.1. Bus Controller Condition Codes
For most op codes, execution is conditional, depending on evaluation of the Condition Code field. Condition Code bits
3-0 define the specific condition. Condition Code bit 4 identifies the required outcome for op code execution, true or
false (1 or 0), following evaluation of Condition Code bits 3-0. The host has read-only access to the BC condition codes
by reading the BC Condition Code Register 0x0037.
Eight of the condition codes (1000 through 1111) are set or cleared based on the outcome of the most recent message.
The remaining eight codes are General Purpose Condition Codes, GP0 through GP7. Three processes affect values
of the General Purpose Condition Code bits: (a) they may be toggled, set or cleared when the BC logic executes a FLG
(GP Flags Bits) op code. (b) they may be toggled, set or cleared when the host writes the BC General Purpose Flag
Register 0x0037. (c) only GP0 and GP1 may be set or cleared when the BC logic executes a CMT (Compare Mes-
sage Timer) op code, or a CFT (Compare Frame Timer) op code. The sixteen BC Condition Codes are summarized
in Table 5.
BC General Purpose
List Start Address
Queue Pointer
BC Instruction
BC Instruction
reg 0x0038
List Pointer
reg 0x0034
reg 0x0033
Increasing
Register
Address
Memory
HI-613x
Space
Figure 3. Bus Controller Message Sequence Structures
Parameter (pointer)
GPQ Words 1 - 62
Instruction List
Bus Controller
BC GP Queue
GPQ Word 63
GPQ Word 63
Parameter
Parameter
Op Code
Op Code
Op Code
in RAM
in RAM
HOLT INTEGRATED CIRCUITS
HI-6130, HI-6131
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6 Unused Addresses
2nd RT Status Word
Tx Command Word
Block Status Word
Data Block Pointer
Command Word *
Time to Next Msg
BC Control Word
Control / Status
RT Status Word
Loopback Word
Block in RAM
Time Tag Word
Message
* Rx Command Word
RT-RT Message Only
if RT-RT Message
Time Tag Bits 31-16
if BC Uses 32-Bit
Time Base
Message Data
Block in RAM
Data Word(s)
Data Word N
Data Word 1