[C.A.E.N]

MODEL C 219

16 CH UNIVERSAL PROGRAMMABLE I/O REGISTER

Data Sheet

[C219]

FEATURES

DESCRIPTION

The Model C 219 is a single width CAMAC module housing 16 channels independently programmable, via CAMAC functions, as input channels, output channels and/or LAM generator.

Each channel is equipped with a 4-bit CHANNEL STATUS REGISTER, writable via CAMAC, determining the working mode. 33 LEDs housed on the front panel indicate:

- the presence of a signal at each channel (1 LED per channel).
- the input or output status of each channel (1 LED per channel)
- the presence of a LAM signal (1 LED).

CAMAC FUNCTIONS

F(0) N A(0): Reads INPUT REGISTER on READ Lines R1 to R16.
F(0) N A(1): Reads STROBE STATUS REGISTER on READ Lines R1 to R3.
F(0) N A(2): Reads LAM MASK REGISTER on READ Lines R1 to R16.
F(1) N A(n): Reads CHANNEL-n STATUS REGISTER on READ Lines R1 to R4.
F(2) N A(0): Reads and clears the INPUT REGISTER on READ Lines R1 to R16.
F(2) N A(1): Reads (R1 to R3) and clears the bit 2 of the STROBE STATUS REGISTER.
F(8) N: Tests LAM line. Q response if LAM is true.
F(9) N A(0)(C, Z): Initialize the module.
F(16) N A(0): Writes OUTPUT REGISTER on WRITE Lines W1 to W16.
F(16) N A(1): Writes STROBE STATUS REGISTER on WRITE Lines W1 to W2.
F(16) N A(2): Writes LAM MASK REGISTER on WRITE Lines W1 to W16.
F(17) N A(n): Writes CHANNEL-n STATUS REGISTER on WRITE Lines W1 to W4.
F(24) N: Disables LAM line.
F(26) N: Enables LAM line.
F(27) N: Tests LAM INTERNAL STATUS (Q response if LAM is true).
NOTE: X, Q responses are generated for any of the functions above.

SPECIFICATIONS

CONNECTORS:

16, LEMO 00; 50 Ohm std. NIM level (1 per channel).
1, LEMO 00; 50 Ohm std. NIM level (STROBE signal).
1, LEMO 00; 50 Ohm std. NIM level (LAM signal).

SIGNALS:

INPUT:
- GLITCH: minimum width 10 ns.
- STROBE: maximum frequency: 30 MHz; duty cycle: 50%; minimum hold time: 25 ns; minimum set-up time: 25 ns.

WORKING LOGIC:

- Positive.
- Negative.

OPERATING MODE

Each channel may be independently programmed as far as the following characteristics are concerned:

INPUT MODE

The I/O status LED of each channel turns OFF just after the programming of the CHANNEL STATUS REGISTER.

The 16 channel pattern is stored into a 16-bit INPUT REGISTER which can be read in one of the following modes:

- INTERNAL STROBE: the input channel pattern is stored in the INPUT REGISTER at the leading edge of the N signal of the CAMAC read operation.

- EXTERNAL STROBE: the input channel pattern is stored into the INPUT REGISTER at the leading edge of the EXT. STROBE signal.

- GLITCHED MODE: the value stored in the INPUT REGISTER indicates a positive or negative transition of the input signal.

OUTPUT MODE

The I/O status LED of each channel, turns ON just after the programming of the CHANNEL STATUS REGISTER.

The CAMAC WRITE-Line status is stored into 16 bit OUTPUT REGISTER and its value is transferred to the outputs in two modes:

- transparent mode:
the stored value is immediately transferred to the outputs;

- extemal strobed mode:
the stored value is transferred to the outputs if the external STROBE signal is true.

LAM GENERATOR MODE

This mode uses a 16-bit LAM MASK REGISTER.

The LAM MASK REGISTER is a 16-bit register which is used together with the INPUT REGISTER to generate a LAM signal. For this purpose, the bit n of the LAM MASK REGISTER and the bit n of the INPUT REGISTER are ANDed (for a total of 16 ANDs) and all the 16 ANDs are ORred. As soon as one of the ANDs becomes true the OR also is true and generates a LAM signal.

If the bit 2 of the STROBE STATUS REGISTER is set, a LAM is also generated following an EXT. STROBE signal.

POWER REQUIREMENTS:

+6 V 2.4 A
-6 V 1 A (unterminated outputs)
Costruzioni Apparecchiature Elettroniche Nucleari S.p.A.
Via Vetraia, 11
I-55049 Viareggio, ITALY
Telephone +39 584 388 398
Fax +39 584 388 959
E-mail: INFO@CAEN.IT

G.M.G. 30th May, 1996