Serial Port Register (Scsptr) - Renesas RZ/A Series User Manual

RZ/A1L Group, RZ/A1LU Group, RZ/A1LC Group
14.3.11

Serial Port Register (SCSPTR)

SCSPTR controls input/output and data of pins multiplexed to the functions of this module. Bits 7 and 6 can control
input/output data of RTS pin. Bits 5 and 4 can control input/output data of CTS pin. 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.
Bit: 15
-
Initial value: 0
R/W: R
Bit Bit Name
—
15 to 8
7 RTSIO
6 RTSDT
5 CTSIO
4 CTSDT
3 SCKIO
2 SCKDT
R01UH0437EJ0600 Rev.6.00
Jan 29, 2021
14 13 12 11 10
- - - - -
0 0 0 0 0
R R R R R
Initial
Value R/W Description
All 0 R Reserved
These bits are always read as 0. The write value should always be 0.
0 R/W RTS Port Input/Output
Specifies input or output for the serial port RTS pin. When the RTS pin is actually
used as a port outputting the RTSDT bit value, the MCE bit in SCFCR should be
cleared to 0.
0: RTSDT bit value not output to RTS pin
1: RTSDT bit value output to RTS pin
1 R/W RTS Port Data
Specifies the input/output data of the serial port RTS pin. Input/output is
specified by the RTSIO bit. For output, the RTSDT bit value is output to the RTS
pin. The RTS pin status is read from the RTSDT bit regardless of the RTSIO bit
setting. However, RTS input/output must be set in the general purpose I/O ports.
0: Input/output data is low level
1: Input/output data is high level
0 R/W CTS Port Input/Output
Specifies input or output for the serial port CTS pin. When the CTS pin is
actually used as a port outputting the CTSDT bit value, the MCE bit in SCFCR
should be cleared to 0.
0: CTSDT bit value not output to CTS pin
1: CTSDT bit value output to CTS pin
1 R/W CTS Port Data
Specifies the input/output data of the serial port CTS pin. Input/output is
specified by the CTSIO bit. For output, the CTSDT bit value is output to the CTS
pin. The CTS pin status is read from the CTSDT bit regardless of the CTSIO bit
setting. However, CTS input/output must be set in the general purpose I/O ports.
0: Input/output data is low level
1: Input/output data is high level
0 R/W SCK Port Input/Output
Specifies input or output for 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
0 R/W SCK Port Data
Specifies 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 general purpose I/O ports.
0: Input/output data is low level
1: Input/output data is high level
14. Serial Communication Interface with FIFO
9 8 7 6 5
- - RTSIO RTSDT CTSIO CTSDT SCKIO SCKDT SPB2IOSPB2DT
0 0 0 1 0
R R R/W R/W R/W
4 3 2 1 0
1 0 0 0 0
R/W R/W R/W R/W R/W
14-22