SH7720 Datasheet, PDF (705/1524 Pages) Renesas Technology Corp – Renesas 32-Bit RISC Microcomputer SuperHTM RISC engine Family / SH7700 Series

Section 19 Infrared Data Association Module (IrDA)
UART frame
Start bit
UART frame
Data
01 0 1 00 1 1 0 1
Stop bit
IR frame
Start bit
Transmit
01
Receive
IR frame
Data
01
0 01 1
01
Stop bit
Bit cycle
3/16-bit cycle
pulse width
Figure 19.2 Transmit/Receive Operation
19.4.3 Data Format Specification
The data format of UART frames used for IrDA communication must be specified by the SCIF_0
registers. The UART frame has eight data bits, no parity bit, and one stop bit.
IrDA communication is performed in asynchronous mode, and this mode must also be specified
by the SCIF_0 registers. The sampling rate must be set to 1/16.
When using IrDA, set the SCIF_0 operating clock by setting the CKE1 and CKE0 bits in the serial
control register to 01.
The IrDA communication rate is the same as the SCIF_0 bit rate, which is specified by the
SCIF_0 registers.
For details on SCIF_0 registers, refer to section 18, Serial Communication Interface with FIFO
(SCIF).
Rev. 3.00 Jan. 18, 2008 Page 643 of 1458
REJ09B0033-0300