Motorola MVME2603-1121A, Инструкция по установке и эксплуатации

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Serial Interconnections
C-5
C
cables are permissible provided the total load capacitance
measured at the interface point and including signal terminator
does not exceed 2500pF.
EIA-530 Connections
The EIA-530 interface complements the EIA-232-D interface in
function. The EIA-530 standard defines the mechanical aspects of
this interface, which is used for transmission of serial binary data,
both synchronous and asynchronous. It is adaptable to balanced
(double-ended) as well as unbalanced (single-ended) signaling and
offers the possibility of higher data rates than EIA-232-D with the
same DB25 connector.
Table C-4 lists the EIA-530 interconnections that are available at
MVME761 serial ports 3 and 4 (J7
and J8 on the board surface) when
those ports are configured via serial interface modules as EIA-530
DCE or DTE ports.
Table C-3. EIA-232-D Interface Receiver Characteristics
Parameter
Value
Unit
Minimum Maximum
Input signal voltage
±
25 V
Input high threshold voltage
2.25
V
Input low threshold voltage 0.75 V
Input hysteresis 1.0 V
Input impedance (
−
15V < V
in
< +15V) 3000 7000
Ω