Timing Error Flag; Testing; Special Test Equipment; Transmit Shift Register Logic - Texas Instruments 990 Maintenance Manual

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Special Test Equipment
Status And Interrupt Logic
Status Transitions
STORECLK-
String:
Ouiput Character
Sample Routine, Output
Character . . . .
Test Equipment, Special
Testing . . . . . . .
Theory Of Operation
Ti
LINE i/O
Reset Signai
Timing Considerations
Timing Diagrams:
Receive Counter
Receive Shift Clock
Transmit Bit Counter
Transmit Go Flag . .
Transmit Shift dock Generation
Transmit Shift Register
Timing Error Flag
TU ORES--
Transfer:
Input Character
Output ,Character
. . 5.3
. 4.2.12
. . T3-3
. 1.2.1, 4.3.l.4
.3.2.6.2
.F3-5
. 5.3
4.4.5
. Section
IV
4.3.5
3.2.2
.FS-8
.FS-7
.FS-5
.FS-3
.FS-4
.FS-6
. 4.2.22
.4.3. l.5
.F3-3
.F3·2
48
Transition Detector. Receive
Transmit Bit Counter
Tr~msmit
Bit Counter Timing Diagram
Transmit Go Flag . . . . . . .
Transmit Go Flag Timing Diagram
Transmit:
Mode . . . .
Preparation To
Transmit Rates
Transmit Shift Clock Generation Timing
Diagram . . . . . . . . .
Transmit Shift Clock Generator
Transmit Shift Gating Logic
Transmit Shift Register:
Logic . . . . . . . .
Timing Diagram
Transmitted Data (XMTDE)
Troubleshooting Procedures
Unpacking
Write Request Flag
. 4.2.18
4.2.7
.FS-5
4.2.5
.FS-3
I '"'I 1
J.,:..J
4.4.1
. I. I
.FS-4
A ") t::
""T •
...,.u
4.2.4
4.2.8
.F4-3
.FS-6
.4.3.3.4
.TS-I,
5.4
. . . 2.2
. 4.2.12.3
Digital Systems Division