Digi NS7520B-1-C36 Hardware Reference Manual page 310

T i m i n g D i a g r a m s
synchronous serial internal clock
SCLK
Enable
TXD
RXD
synchronous serial external clock
SCLK
Enable
TXD
RXD
2 9 8
N S 7 5 2 0 H a r d w a r e R e f e r e n c e , R e v G 9 / 2 0 0 7
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