IBM Series 1 User Manual page 10

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Feature. This chapter
provides a qeneral description and a block--diagram of the
teletypewriter adapter feature.
Other sections of the chapter provide:
• Interface options for the teletypewriter adapter--this
includes isolated and non-isolated current loops and
voltaqe level interfaces for ElA* and TTL
(transistor-transistor loqic).
• Timinq sequences for transmit and receive operations.
• Electrical characteristics--this includes driver
and
receiver information for each method of attaching a
device to the teletypewriter adapter.
• Physical characteristics--this section provides
connector information and signal pin assignments.
~!!.~l2i~£
2.!.
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Qigi1g1
!1l1H!.!LQY.1I2Y1 199j;'y!g. This
chapter provides a qeneral description of the integrated
diqital input/output non-isolated feature.
A block
diagram
shows the reqisters and signal lines associated ~ith this
feature. The introduction includes a functional description
for: diqital input, digital output, and the external control
line s.
•
•
•
other sections of the chapter provide:
Operational characteristics--this section includes
timinq sequences for write diqital output and read
diqital input usinq external Eync.
Electrical characteristics--this includes driver and
receiver information for attaching the user's instrument
or device.
Physical characteristics--this section provides
connector information and siqnal pin assignments at the
connectors for the digital
I/O
fea ture and a t the
connectors for the customer access panel feature.
*Electronic Industries Association
2001 Eve Street. N.W.
Washington, D.C. 20006
Preface ix