5962F9855201VZX View Datasheet(PDF) - Aeroflex UTMC

Part Name

Description

Manufacturer

5962F9855201VZX

RadHard MicroController

Aeroflex UTMC 

Fault Register

The UT69R000 uses the Fault Register (FT) to indicate the

occurrence of a machine-error fault. A machine-error fault

cannot be disabled. The UT69R000 uses the logical OR

combination of the 16 bit FT to generate a Machine Error

interrupt, bit 14 of the PI. Any bits in the FT the UT69R000

does not use are set to a logic zero. The UT69R000 reads,

writes, and clears the FT with INR and OTR instructions. Fault

Register bits reflecting external pins are level sensitive; bit(s)

cannot be reset until the external signal is negated.

15 14 13 12 11 10 9

MEM PARITY I/O

PROT

876 543210

S ILLEGAL R BUILT-

Y

INSTRUC-

TION AND

E

IN-

TEST

F ADD FAULT S

T

MSB

LSB

Figure 12. The Fault Register (FT)

Bit Number

Bit 15

Mnemonic

CMPF

Bit 14

DMPF

Bit 13

Bit 12

Bit 11

Bit 10

Bit 9

Bit 8

Bit 7

MCHNE2

SFT8

SFT7

BTERR2

SFT6

MCHNE1

BTERR1

Description

CPU Memory Protect Fault. This bit indicates the UT69R000 has

detected an access fault on the operand but (i.e., attempted access

to write or read-protected memory). This bit is asserted only when

the UT69R000 is controlling the Operand Data Bus and the

MPROT input is asserted. [0]

DMA Memory Protect Fault. This bit indicates a DMA device has

detected an access fault (i.e., attempted access to write or read-

protected memory). This bit is asserted when the UT69R000 is

not controlling the Operand Data Bus and the MPROT input is

asserted.

Machine Error 2. This bit indicates that a user-defined machine

error has occurred. Reflects status of external input pin MCHNE2.

Software Error 8. This bit indicates that a user-defined software

machine error has occurred.

Software Error 7. This bit indicates that a user-defined software

machine error has occurred.

I/O Bus Timer Error. This bit indicates that a bus or time-out error

occurred. The bit is set if the UT69R000 is performing an I/O

access and BTERR input is asserted.

Software Error 6. This bit indicates that a user-defined software

machine error has occurred.

Machine Error 1. This bit indicates that a user-defined machine

error has occurred. It reflects the status of external input pin

MCHNE1.

Memory Bus Timer Error. This bit indicates that a bus or time-out

error occurred. The bit is set if the UT69R000 is performing a

memory access and the BTERR input is asserted.

12

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