CONTROLS HARDWARE RELEASE NO. 71.0CONTROLS
CAMAC 187
DIGITAL OUT
ED-218567
CONTROLS HARDWARE RELEASE NO. 71.0
CAMAC 187 Module
Multiplexed Digital Output
Robert J. Ducar
Yurij S. Chernousko
October 15, 1990
1 DESCRIPTION
2 CAMAC 187 OP CODES
5 SPARES
6 DOCUMENTATION
7 PALS DOCUMENTATION
8 ASSOCIATED DOCUMENTATION
Appendix A
1 DESCRIPTION
The one-wide CAMAC 187 module provides digital output
control for applications requiring moderate amounts of control
data. The module furnishes 16 words of 16 bit data with
associated address and strobe lines for external latching.
Some amount of digital monitor is also accepted.
The module has been developed to effect control of new
mountain ranges boxes that have been designed by Stan Tawzer.
Each of these new boxes requires nearly three words of control
data and provides three bits of status. Accordingly, a single
187 module could support up to five mountain range boxes.
Development of the module was initiated to effect a
significant saving of CAMAC crate slot useage that would
otherwise be necessary if already developed modules were used.
The mountain range boxes do not have latch capability.
To provide necessary demultiplexing and latch capability, a
NIM module has also been designed to fulfill these
requirements. All connections between the 187 module, the NIM
module, and the mountain range box(es) can be realized with
ribbon cable to facilitate implementation.
All signals from the 187 module are active high and TTL
compatible. Address and data for each output word are
normally gated out for ten microseconds. A one microsecond
strobe pulse is normally issued eight microseconds after
address and data are stable. CAMAC read or write operations
to the on-board cache memory may alter the time that data is
stable before strobe. Data will, however, be stable at least
five microseconds before strobe. Control lines may be
terminated with 1K ohm resistors. The address and strobe
outputs may be terminated with 100 ohms.
Upon power-up or Z*S2 of the module, LAM is asserted and
the output strobe is inhibited until receipt of the F(16)A(15)
or F(26)A(0) operation. LAM will also be asserted if the
output strobe is inhibited by the F(24)A(0) operation.
Monitor is effected by multiplexing a single bit of data
to the 187 module for each unique state of the address lines.
These bits will be latched, irrespective of the state of LAM,
and organized as a single 16 bit word of status.
2 CAMAC 187 OP CODES
All codes return module Q and X immediately.
This module may assert LAM.
F(0) A(n) Read Control Word n n = 0 --> 15
---------
R16 (MSB) - (LSB) R1
-----------------------------------
C15 - Control Word n - C0
F(1) A(0) Read Combined External Status
---------
R16 (MSB) - (LSB) R1
-----------------------------------
MSB - External Status - C0
F(6) A(0) Read Module Number
---------
R16 - R10 | R9 - R1
------------------------------
| 0 | BB Hex, 187 Dec |
F(7) A(0) Dummy Read - No Data are Returned
---------
F(16) A(n) Write Control Word n n = 0 --> 15
----------
W16 (MSB) - (LSB) W1
-----------------------------------
C15 - Control Word n - C0
F(24) A(0) Disable Output Strobe (Set LAM)
----------
F(26) A(0) Enable Output Strobe (Reset LAM)
----------
3 CAMAC 187 MODULE - I/O ASSIGNMENTS
Rear I/O: 36 Position Edge Connector A = R B = L
POS SIGNAL POS SIGNAL
--- -------------- --- ----------------
1L COMMON 1R COMMON
2L COMMON 2R COMMON
3L C15 (MSB) 3R C14
4L C13 4R C12
5L C11 5R C10
6L C9 6R C8
7L C7 7R C6
8L C5 8R C4
9L C3 9R C2
10L C1 10R C0 (LSB)
11L COMMON 11R COMMON
12L STROBE 12R COMMON
13L COMMON 13R COMMON
14L A8 14R COMMON
15L A4 15R Mn
16L A2 16R COMMON
17L A1 17R COMMON
18L COMMON 18R COMMON
Custom 187 I/O Board
____________________
A custom I/O pc board is available for the 187 module to adapt
the board I/O to a 26 position ribbon cable connector.
Assignment of this connector is as follows:
POS SIGNAL POS SIGNAL
--- -------------- --- ----------------
1 C15 (MSB) 2 C14
3 C13 4 C12
5 C11 6 C10
7 C9 8 C8
9 C7 10 C6
11 C5 12 C4
13 C3 14 C2
15 C1 16 C0 (LSB)
17 COMMON 18 STROBE
19 COMMON 20 A8
21 A4 22 A2
23 A1 24 COMMON
25 Mn 26 COMMON
4 CAMAC 187 MODULE - FRONT PANEL
The CAMAC 187 module has the following front
panel features:
N led: Red (stretched)
LAM led: Red (not stretched)
Output Active: Green (stretched)
5 SPARES
A supply of CAMAC 187 operational spares is maintained on
the second floor of the Linac Annex.
6 DOCUMENTATION
0812-ED-218567 Schematic
0812-BD-218568 Artwork (RF-134)
0812-BD-218569 Master Drawing
0812-MD-34863 Outline Drawing
0812-MC-35522 Front Panel Mechanical
0812-MD-218570 Front Panel Silkscreen
7 PALS DOCUMENTATION
Directory: DEVL::USR$DISK3:[DUCAR.PALS]
Filenames: 18710A.DAT NAF Decoder PLS173
18733A.DAT Status Latch PLS153 (2 Required)
Also loaded at Location #34
8 ASSOCIATED DOCUMENTATION
NIM Based Demultiplexer for Mountain Range Boxes
0818-ED-218571 Schematic
0818-BD-218572 Artwork (RF-135)
0818-BD-218573 Master Drawing
MRL22A.DAT Latch Control PAL (2 Reqd)
rjd: DEVL::USR$DISK3:[DUCAR.DOC]CMC187.RNO
APPENDIX A
Mountain Range Box Specifics
#BITS Description
----- ----------------------------------------------------
17 TD - Turn Delay Range = 1 -> 99,999
7 VTD - Vernier Turn Delay LSB = 250 ps Range = 68 ns
11 BS - Bucket Number Select Range = 1 -> 1113
6 NS - Number of Sweeps Range = 1 -> 63
1 AS - Auto Stop = 1, Free Run = 0
1 Mn - Multiplexed Return Status:
Associated with CW0 - Power On = 1, Power Off = 0
Associated with CW1 - Auto Stop = 1, Free Run = 0
Associated with CW2 - Local = 1, Remote = 0
Repeat pattern modulo 3.
Associated with CW15 -
NIM Latch Module Power On = 1, Power Off = 0
Suggested Arrangement of bits in three control words:
-----------------------------------------------------
CW0 CW1 CW2
|-----------------|-------------------------|------------------|
* TD (less MSB) * 0 BS | AS 0 0 TD(MSB) * 0 0 NS | 0 VTD *
* 16 Bits * 12 Bits | 4 Bits * 8 Bits | 8 Bits *
Tawzer Suggested Arrangement of 60 position connector:
------------------------------------------------------
1 3 to 19 22 to 32 38 to 44 48 to 53 54 to 57 60
--------------------------------------------------------------------
L - TD - M L - BS - M L - VTD - M L - NS - M S S C S
GG GG 5G 3G 3G
