NJU3503
s SERIAL INPUT OUTPUT
SERIAL INPUT OUTPUT consists of the sift registers to convert from 8-bit parallel data to serial data, the 3-
bit serial clock counter, and the 3-bit serial control register. It operates as the 8-bit serial input or output. The
external or internal clock is selected as the shift clock in accordance with the Serial Input / Output control
register.
[ Block diagram of the Serial Input Output ]
INTERNAL CLOCK
COUNTER
SERIAL I/O INTERRUPT SIGNAL
DB
3
4
CONTROL REGISTER
DEMULTIPLEXER
4
4
8-bit SERIAL DATA REGISTER
4
4
MULTIPLEXER
4
DB
SELECTOR
SCK/CKOUT SDI(O)/PG1
SDO/PG0
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