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2. Block Diagram
Figure 10-1 shows a block diagram of SCI1.
ø
PSS
ø
/4
W
SCK1
SI
1
SO
1
Notation:
SCR1:
Serial control register 1
SCSR1: Serial control status register 1
SDRU:
Serial data register U
SDRL:
Serial data register L
IRRS1:
Serial 1 interrupt request flag
PSS:
Prescaler S
Transmit/receive
control circuit
Figure 10-1 SCI1 Block Diagram
SCR1
SCSR1
Transfer bit counter
SDRU
SDRL
IRRS1
243
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