Motorola MVME712A 用户手册

Support Information

3-10

10

DB04*

DATA bus (bit 4) 

11

GND

GROUND 

12

DB05*

DATA bus (bit 5) 

13

GND

GROUND 

14

DB06*

DATA bus (bit 6) 

15

GND

GROUND 

16

DB07*

DATA bus (bit 7) - most signiÞcant bit and the 
highest priority during the arbitration phase. 

17

GND

GROUND 

18

DBP*

DATA bus (parity) - data parity is odd. Use of 
parity is a system option. Parity is not valid 
during the arbitration phase. 

19-24

GND

GROUND 

25

Not used. 

26

TERMPWR

TERMINATOR POWER 

27-31

GND

GROUND 

32

ATN*

ATTENTION - signal driven by the initiator. 
Indicates the attention condition. 

33-35

GND

GROUND 

36

BSY*

BUS BUSY - OR-tied signal that indicates that 
the bus is being used. 

37

GND

GROUND 

38

ACK*

ACKNOWLEDGE - signal driven by an initiator 
to indicate an acknowledgment for a REQ/ACK 
data transfer handshake. 

39

GND

GROUND 

40

RST*

RESET - OR-tied signal that indicates the RESET 
condition. 

41

GND

GROUND 

42

MSG*

MESSAGE - signal driven by the target during 
the message phase. 

43

GND

GROUND 

44

SEL*

SELECT - signal used by an initiator to select a 
target or by a target to reselect an initiator. 

45

GND

GROUND