SH7211 Datasheet, PDF (719/1228 Pages) Renesas Technology Corp – 32-Bit RISC Microcomputer SuperHTM RISC engine Family

Section 15 Serial Communication Interface with FIFO (SCIF)
15.3.11 Serial Port Register (SCSPTR)
SCSPTR controls input/output and data of pins multiplexed to SCIF function. Bits 3 and 2 can
control input/output data of SCK pin. Bits 1 and 0 can input data from RXD pin and output data to
TXD pin, so they control break of serial transmitting/receiving.
The CPU can always read and write to SCSPTR. SCSPTR is initialized to H'0050 by a power-on
reset.
Bit: 15 14 13 12 11 10 9
8
7
6
5
4
3
2
1
0
-
-
-
-
-
-
-
-
-
-
-
- SCKIO SCKDT SPB2IOSPB2DT
Initial value: 0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
R/W: R
R
R
R
R
R
R
R
R
R
R
R R/W R/W R/W R/W
Bit
Bit Name
15 to 4 —
3
SCKIO
2
SCKDT
Initial
Value
All 0
0
0
R/W Description
R Reserved
These bits are always read as 0. The write value should
always be 0.
R/W SCK Port Input/Output
Indicates input or output of the serial port SCK pin.
When the SCK pin is actually used as a port outputting
the SCKDT bit value, the CKE[1:0] bits in SCSCR
should be cleared to 0.
0: SCKDT bit value not output to SCK pin
1: SCKDT bit value output to SCK pin
R/W SCK Port Data
Indicates the input/output data of the serial port SCK
pin. Input/output is specified by the SCKIO bit. For
output, the SCKDT bit value is output to the SCK pin.
The SCK pin status is read from the SCKDT bit
regardless of the SCKIO bit setting. However, SCK
input/output must be set in the PFC.
0: Input/output data is low level
1: Input/output data is high level
Rev. 2.00 May. 08, 2008 Page 695 of 1200
REJ09B0344-0200