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(2) Normal Data Input
During normal data input from the external device, LSI element
ME25 generates a CLKTB1 pulse, slightly delayed from data
strobe, each time a printable character or a CR code has been
received. The trailing edge of CLKTB1 then clocks data lines
DS1-DS8 into the shift register.
(3) Following a Carriage Return Code
Following the reception of a carriage return code, LSI chip
ME16 generates CLKTB2 pulses to the shift register, at the
same rate as the OSC clock. This shifts the register until
the dummy character appears at the output (TB8 goes high).
The high TB8 then terminates the CLKTB2 pulses.
(4) During Character Printing
When printing a line of characters, during each DCWO interval
(developed internally in LSI chip ME16), the video STROBE
pulse generates a CLKTB2 pulse. This clocks the next con-
secutive character to the output of the shift register, where
it
remains until the next DCWO-STROBE interval.
4-13
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