UT1553 데이터 시트보기 (PDF) - Aeroflex UTMC

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UT1553

Remote Terminal Multi-Protocol

Aeroflex UTMC 

3.6.1 Operational Status Register (OPS)

The OPS provides the host with the operational status of the RTMP while the RTMP is active. Figure 9 shows the information

bits stored in the OPS.

OPS Bit Definitions

Bit 15

MACT [0]

Message Active. MACT = 1 indicates that the RTMP is actively processing a message. The RTMP

clears MACT upon completing the message.

Bit 14

VMPRO [0] Valid Message Processed. VMPRO = 1 indicates that the RTMP has processed a valid 1553

message. The host clears VMPRO bit when the OPS is read.

Bit 13 ME [0]

Message Error. ME = 1 indicates that a 1553 message error has occurred. The host clears ME

when the OPS is read unless the condition that caused the MERR still persists after the register

read.

Bit 12 PE [X]

Parity Error. PE = 0 indicates that the RTMP has detected an error in the Terminal Address parity.

This bit can only be active when TAPEN = 1.

Bit 11 STACT [0] Self-Test Active. STACT = 1 indicates that the RTMP is performing a built-in self-test.

Bit 10

BDCEN [X] Broadcast Enable. BDCEN = 1 indicates that the RTMP will accept a 1553 broadcast command

as a valid command.

Bit 9

TFGEN [1]

Terminal Flag Enable. When the RTMP is in the 1553B mode, TFGEN = indicates that the

Terminal Flag option is set. Mode code 00110 (Inhibit Terminal Flag) will clear this bit.

Bit 8

CHAEN [0]

1553 Channel A Enable. CHAEN = 1 indicates that Channel A is enabled and ready to process

1553 bus messages.

Bit 7

CHBEN [0]

1553 Channel B Enable. CHBEN = 1 indicates that Channel B is enabled and ready to process

1553 bus messages.

Bit 6

MSEL [X]

Mode Select. When MSEL = 1, the RTMP is in the 1553A mode of operation. MSEL = 0 indicates

the RTMP is in the 1553B mode of operation.

Bit 5

MDRCV [0] Mode Received. MDRCV = 0 indicates that the last valid 1553 command the RTMP received

was a mode command.

Bit 4

XMTAC [0] Transmitter Active. XMTAC = 1 indicates that the RTMP’s transmitter is transmitting data.

Bit 3

ILCMD [X]

Illegal Command. ILCMD = 1 indicates that the last 1553 command the RTMP received was

illegal. ILCMD is cleared when the host reads the OPS. In 1553A mode, this bit reflects input pin

ILLCOM. In 1553B mode, this bit reflects either input pin ILLCOM or internal hardware. Internal

illegalization is reviewed in table 2.

Bit 2

CHA/B [0]

Channel A or . CHA/B = 1 indicates that the last valid 1553 command word the RTMP received

was on Channel A. CHA/ B = 0 indicates that the last valid command word was on Channel B.

Bit 1

VCMD [0]

Valid 1553 Command. VCMD = 1 indicates that the last command word the RTMP received was

valid. VCMD is reset when the host reads the OPS.

Bit 0

OE [0]

Overrun Error (Framing Error). OE = 1 indicates that the RTMP has detected an overrun error.

This bit is reset when the host performs an OPS read unless the error condition persists.

15 14

M

V

A

M

C

P

C

R

O

MSB

13 12

MP

EE

11 10

S

B

T

D

A

C

C

E

T

N

9

8

T

C

F

H

GA

EE

NN

7

6

5

4

CM

M

X

H

S

D

M

B

E

R

T

E

L

C

A

N

VC

Figure 9. The Operational Status Register

3

2

IC

LH

CA

M

/

DB

1

0

V

0

C

E

M

D

LSB

RTMP-16

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