SH7751 Datasheet, PDF (848/1224 Pages) Renesas Technology Corp – 32-Bit RISC Microcomputer

18. I/O Ports
SCI I/O port block diagrams are shown in figures 18.3 to 18.5.
SCK
Reset
R
QD
SPB1IO
C
SPTRW
Reset
QR _D
SPB1DT
C
SPTRW
Internal data bus
SCI
Clock output enable signal
Serial clock output signal *
Serial clock input signal
Clock input enable signal
SPTRR
Legend:
SPTRW: Write to SPTR
SPTRR: Read SPTR
Note: * Signals that set the SCK pin function as internal clock output or external clock input according to
the CKE0 and CKE1 bits in SCSCR1 and the C/A bit in SCSMR1.
Figure 18.3 SCK Pin
Rev.4.00 Oct. 10, 2008 Page 750 of 1122
REJ09B0370-0400