UT1553B/BCRTMP-WPA 데이터 시트보기 (PDF) - Aeroflex UTMC

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UT1553B/BCRTMP-WPA

Bus Controller Remote Terminal Multi-Protocol (BCRTMP)

Aeroflex UTMC 

LEGALIZATION SIGNALS

NAME

BRDCAST

PIN NUMBER

F/P

PGA

122

D‘

MC

123

F3

LGLEN

127

F1

LGLCMD

124

F2

ERR

125

G2

DOMC

126

G3

TYPE

TTO

TTO

TTO

TUI

TO

TUI

ACTIVE

AH

AH

AL

AH

AL

AH

DESCRIPTION

Broadcast. When high, this pin indicates that the

current command is a broadcast command.

Mode Code. When high, this pin indicates that the

current command is a mode command.

Legalization Bus Enable. When low, this pin enables

the user-supplied legalization logic (if the

Legalization bus is used).

Legal Command. A high on this input signal indicates

to the BCRTMP that the current command is legal.

Error. When low, this pin indicates that a data word

parity error or a Manchester error occurred in the

current command. When this signal is asserted, the

Legalization bus bits 4-0 contain the word count for

the defective data word.

Do Mode Code. When high, this signal enables the

automatic execution of mode codes. When low, this

signal disables auto-execution.

CLOCK SIGNALS

NAME

CLK

MCLK

MCLKD2

PIN NUMBER

F/P

PGA

3

J1

TYPE ACTIVE

DESCRIPTION

TI

--

Clock. The 12MHz input clock requires a 50%

± 10% duty cycle with an accuracy of ± 0.01%. The

accuracy is required in order to meet the Manchester

encoding/decoding requirements of MIL-STD-1553.

58

K14

TI

--

Memory Clock. This is the input clock frequency the

BCRTMP uses for memory accesses. The memory cycle

time is equal to two MCLK cycles. Therefore, RAM

access time is dependent upon the chosen MCLK

frequency (6MHz minimum, 12MHz maximum). Please

see the BCRTMP DMA timing diagrams in this data sheet.

74

E15

TO

--

Memory Clock Divided by Two. This signal is the

Memory Clock input divided by two. It assists the

host subsystem in synchronizing DMA events.

BCRTMP-15

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