SH7730 Datasheet, PDF (822/1188 Pages) Renesas Technology Corp – Renesas 32-Bit RISC Microcomputer SuperHTM RISC engine Family / SH7780 Series

Section 24 IrDA Interface (IrDA)
The IrDA has the following CRC calculation features.
• Generator polynomial: X¹⁶ + X¹² + X⁵ + 1
• Data input
 Input in bytes
 CRC is calculated in 8-bit units starting from the lower bits.
• CRC output: 16-bit CRC is output.
• Maximum data length: 4096 bytes
Figure 24.1 shows a block diagram of the IrDA.
Internal
data
bus
IrDA interface
UART block
(IrDA)
Infrared transmit and
receive pulse
modulator/demodulator
block
MSFCLK_OUT
MSFCLK_IN
Clock (baud rate × 16)
IROUT
TXD
RXD
UART transmit signal
UART receive signal
TXD
RXD
IRIN
Infrared transceiver
Infrared transmit pulse
Infrared receive pulse
CRC engine block
SCLK
Figure 24.1 Block Diagram of IrDA
Rev. 1.00 Sep. 19, 2007 Page 774 of 1136
REJ09B0359-0100