r5s77631ay266bgv Renesas Electronics Corporation., r5s77631ay266bgv Datasheet - Page 1246

• Manufacturer Part Number: r5s77631ay266bgv
• Description: Renesas 32-bit Risc Microcomputer Superhtm Risc Engine Family Sh-4a Series
• Manufacturer: Renesas Electronics Corporation.

Section 28 Serial Communication Interface with FIFO/IrDA Interface (SCIF/IrDA)
28.5.2
Figure 28.22 shows a block diagram of the infrared data communication interface.
The infrared data communication interface selects whether serial communication data for the
SCIF2 channel is modulated/demodulated to the infrared data for transmission or reception.
When the IRMOD bit in SCSMRIR is 1, the modulated/demodulated IrDA data is input/output
from the SCIF2_TXD/SCIF2_RXD pin. When the IRMOD bit in SCSMRIR is 0, the data for the
SCIF2 channel is bypassed to the SCIF2_TXD/SCIF2_RXD pin.
When the LOOP bit in SCSMRIR is set to active, output from the infrared data modulation unit is
directly input to the demodulation unit (for loopback testing).
The selector does not use clocks for its logic. Therefore, the status of the selector after a reset or in
standby depends on only the value of SCSMRIR.
Note: This module can detect short pulses such as chattering in reception, be sure to secure the
shortest pulse width specified by the IrDA standard.
Rev. 1.00 Oct. 01, 2007 Page 1180 of 1956
REJ09B0256-0100
Infrared data communication interface
transmission
Serial data
Serial data
Channel
reception
SCIF2
Operation of Infrared Data Communication Interface
Figure 28.22 Block Diagram of Infrared Data Communication Interface
s_txd
s_rxd
IRMOD
1
0
s_txd
p_rxd
i_rxd
Demodulation unit
Modulation unit
i_rxdp_n
i_txd_n
LOOP
1
0
s_txd
i_txd_n
p_rxd
IRMOD
0
1
p_rxd
p_txd
Port logic block
SCIF2_RXD
SCIF2_TXD