Datasheet

Section 10 Serial Communication Interface
Rev. 6.00 Aug 04, 2006 page 333 of 680
REJ09B0145-0600
2. Block Diagram
Figure 10.1 shows a block diagram of SCI1.
φ
φ
W
/4
SCK
1
SI
1
SO
1
PSS
Transmit/receive
control circuit
SCR1
SCSR1
Transfer bit counter
SDRU
SDRL
IRRS1
Transfer bit counter
Legend:
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
Figure 10.1 SCI1 Block Diagram