Section 12 Serial Communication Interface (SCI)
Rev. 3.00 Sep. 27, 2007 Page 470 of 758
REJ09B0243-0300
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.
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.
Reset
Internal data bus
Clock output enable signal
*
Serial clock output signal
*
Serial clock input signal
*
Serial input enable signal
*
Bit 3
Bit 2
Reset
Q
D
R
SCKIO
SCK
C
Q
D
R
SCKDT
SPTRW
SPTRW
C
Figure 12.19 SPB1IO bit, SPB1DT bit, and SCK Pin
SPTRW: SCSPTR
write
Internal data bus
Transmit enable signal
Bit 0
Reset
Serial transmit data
TXD
Q
D
R
SPBDT
SPTRW
C
Figure 12.20 SPB0DT bit and TXD Pin
Содержание SH7124 R5F7124
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