Figure 4-8. Data Control Block Diagram

TM 11-6625-3024-14/EE641-AC-MMA-010/E154 SYSEX/TO 33AA50-5-1-1

The outputs of the Data Select latches are also

provide status inputs to the processor which

include: CONT READ IND, REPEAT ON ERROR

applied to external circuits. 4K BLOCK IND is

IND, BLOCK MODE IND, and WRITE IND.

applied to the Write Data Control circuits to inhibit

the 256-bit counter. This will allow a second

PULSE INPUT 2 from the processor is used to

counter to continue counting to 4096 bits. The

clock the selected switch data into the Data Select

SHIFT ONES IND is applied to the Write Data

Latches. CLEAR F/F signal from the processor

circuits. This signal selects an output from the Data

Word Selector (See Figure 4-3) that will allow ones

clears all latches except the Write Latch. WRITE R

to shift through the eight tracks of data. The

and WRITE S from the processor are used to set or

reset the WRITE latch on command.

remaining outputs from the Data Select Latches

Figure 4-8. Data Control Block Diagram

4-13