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TM 11-6625-3145-14
Theory of Operation-318/338 Service
Table 4-11.
338 LSI-A INPUT SIGNALS
Signal
Names
Description
TIMER
Timer from the LSI-B occurs at a constant interval after it is cleared by the CLR INT signa l at I/O address 5F
hex
.
TRIG’D
Active high; the output of the TRIG flag. Indicates that the trigger sequencer has been triggered.
RESET
Clears the flip-flop in LSI-A that temporiarly saves the TRG’D signal.
N
Active low; the output of the N flag. It indicates that NA in the trigger sequence is complete.
STOP2
Active low; the output of the STOP flag. Indicates that the data acquisition is complete.
CARRY
Active low; set by the carry flip-flop on the A04 board, which detects a carry condition from the A CQ memory address
counter.
RDSTS
Generated at I/O address 5D
hex
by the MPU to request the status signals.
Table 4-12.
LSI-A OUTPUT SIGNALS
Signal
Names
Description
N-1
Active low; generated as a carry bit when the event/delay counter reaches full count.
INT
Active low; the output of the INT flag in LSI-A. The MPU receives INT when an interrupt in the ACQ status logic
occurs. INT is caused by any change in any status signal. The INT flag is reset by RDSTS.
WAFLG
Active low; read as NFLAG by the MPU isssuing RDSTS. WAFLG is the output of the same latch which N is latched
into by RDSTS.
DTFLG
Active high; read as TRIG’D FLAG by the MPU issuing RDSTS. DTFLG is the output of the same latch which
TRIG’D is latched into by RDSTS.
STFLG
Active high; read as STOP FLAG by the MPU issuing RDSTS. STFLG is the
output of the same latch which
STOP2 is latched into by RDSTS.
CAFLG
Active high; read as CARRY FLAG by the MPU isssuing RDSTS. CAFLG is the output of the same latch which
CARRY is latched into by RDSTS.
4-51
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Страница 313: ...TM 11 6625 3145 14 Figure 7 19 Troubleshooting Tree 8 Data Acquisition ACQ A01 A02 Sheet 4 of 6 7 60 ...
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Страница 519: ...TM 11 6625 3145 14 318 338 4434 925 318 Acquisition Module Wiring Diagram ...
Страница 520: ...TM 11 6625 3145 14 318 338 4434 926 318 338 Mainframe Wiring Diagram ...
Страница 521: ...TM 11 6625 3145 14 318 338 4434 926 338 Acquisition Module Wiring Diagram ...
Страница 522: ...TM 11 6625 3145 14 318 338 4434 928 Figure 9 1 318 A01 Input A Board Component Locations ...
Страница 526: ...TM 11 6625 3145 14 ...
Страница 528: ...TM 11 6625 3145 14 Figure 9 3 318 338 A03 ACQ Control Board Component Locations ...
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Страница 542: ...TM 11 6625 3145 14 Figure 9 8 318 338 A10 CRT Board Component Locations ...
Страница 544: ...TM 11 6625 3145 14 Figure 9 9 318 338 A11 Inverter Board component Locations ...
Страница 546: ...TM 11 6625 3145 14 Figure 9 10 318 338 A12 Regulator Board Component Locations ...
Страница 548: ...TN 11 6625 3145 14 Figure 9 11 318S1 338S1 A07 Serial RS232 Non Volatile Memory Board Component Locations ...
Страница 551: ...TM 11 6625 3145 14 Figure 9 12 338 A01 Input A Board Component Locations ...
Страница 553: ...TM 11 6625 3145 14 318 338 SERVICE ...
Страница 554: ......
Страница 555: ...PIN 058584 ...