Physics and Engineering of Radiation Detection

726 Chapter 13. Data Acquisition Systems

P1

P2

P3

P4

P5

X

I

C

N

L

S1

S2

W24

W22

W20

W18

W16

W14

W12

W10

W8

W6

W4

W2

R24

R22

R20

R18

R16

R5

R7

R9

R11

R13

R23

R19

R17

R15

R21

G

Y2

+12

Y1

NC

NC

−12

R2

R4

R6

R8

R10

R12

R14

G

+6

+24

E

NC

−6

−24

R3

R1

W21

W23

W19

W17

W15

W13

W11

W9

W7

W5

W3

W1

Q

Z

A1

A8

F1

F2

F4

F8

F16

B

A4

A2

Busy

Function

Function

Function

Function

Function

Subaddress

Subaddress

Subaddress

Subaddress

Initialize

Response

Individual Patch Contact

Individual Patch Contact

Individual Patch Contact

Free Bus Line

Free Bus Line

Command Accept

Inhibit

Clear

Station Number

Look−at−Me

Strobe−1

Strobe−2

−12 VDC

Auxiliary −6 V Supply

Auxiliary +6 V Supply

+12 VDC

Power Return Power Return

+6 VDC

+24 VDC

Earth

Not Connected

Not Connected Not Connected

Write Bus Lines

(W24...W1)

(R24...R1)

Read Bus Lines

−6 VDC

−24 VDC

Figure 13.2.2: Pin allocation of

one of 23 normal stations in a

CAMAC crate (as viewed from

front of the crate).

B.3 CAMACLogic

The CAMAC logic conforms to the standard TTL and DTL series logic with one
exception that the signal convention is inverted such that the high state corresponds
to logic 0 and low state to logic 1.

13.2.CVMEStandard..........................

VME stands for Versa Module Europa. It was jointly introduced in 1981 by Mostek,
Motorola, Phillips, and Thompson. The original motivation of VME development
and standardization was to introduce modular approach to highly intense computing
tasks. However it was quickly adopted by researchers in other fields as well, so much
that it now probably stands as the most used system in research laboratories. Due