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Page Title:
Peripheral Equipments External to Logic Unit 1 (Channels 12, 13, 14, and 15) and Digital Input Multiplexer. |
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|  MIL-D-81347C(AS)
(3) D a t a - All data lines from a peripheral equipment shall remain
stable for a minimum of 20 milliseconds or until a Channel Input Acknowledge is received by the equip-
ment.
(4) Channel Input Acknowledge - The DIM shall transmit a
Channel Input Acknowledge signal to the peripheral when the data from the peripheral equipment has
been received by the computer. The Channel Input Acknowledge signal shall be a logical "1" signal of
2.2 microseconds minimum duration. The Channel Input Acknowledge signal indicates to the peri-
pheral equipment that it may drop its Enter line at its convenience. The TACCO, Universal Keysets
and Pilot/CRT/ORD Keysets shall not require an Input Acknowledge to reset their Enters.
3.5.1.4.1.5.5
Peripheral Equipments External to Logic Unit 1 (Channels 12,
13, 14, and 15) and Digital Input Multiplexer.
3.5. 1.4.1.5.5.1
Signal
Characteristics
(1) logical "l" = 0 + 1/2 -0.0 volt
logical "0" = 4 1 volts
(2) All signals between the DIM and the external peripheral
equipments shall be transmitted over twisted pair cables.
(3) Enter - Same as 3.5.1.4.1.5.4.1 (2)
(4) Data - The data lines from an external peripheral equipment
shall be stable at least one microsecond before the Enter line is set and shall remain stable until a
Channel Input Acknowledge signal is received from the DIM, The selective enabling of data from an
external peripheral equipment for transmission to the computer shall be performed in the DIM and
hence no Data Enable signal shall be required for the data to be transmitted from the external peri-
pheral equipment to the DIM.
(6) Channel Input Acknowledge - Same as 3.5.1 .4.1.5.4.1 (4).
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