SH7125_08 Datasheet, PDF (490/774 Pages) Renesas Technology Corp – Renesas 32-Bit RISC Microcomputer SuperH™ RISC engine Family

Section 12 Serial Communication Interface (SCI)
12.6 Serial Port Register (SCSPTR) and SCI Pins
The relationship between SCSPTR and the SCI pins is shown in figures 12.19 and 12.20.
SCK
Reset
R
QD
SCKIO
C
Bit 3
SPTRW
Reset
R
QD
SCKDT
C
Bit 2
SPTRW
Internal data bus
Clock output enable signal*
Serial clock output signal*
Serial clock input signal*
Serial input enable signal*
SPTRW: SCSPTR write
Note: * These signals control the SCK pin according to the settings of the C/A bit in SCSMR
and bits CKE1 and CKE0 in SCSCR.
Figure 12.19 SPB1IO bit, SPB1DT bit, and SCK Pin
TXD
Reset
R
QD
SPBDT
C
Bit 0
SPTRW
Internal data bus
Transmit enable signal
Serial transmit data
SPTRW: SCSPTR write
Figure 12.20 SPB0DT bit and TXD Pin
Rev. 4.00 Jul. 25, 2008 Page 470 of 750
REJ09B0243-0400