BU92747XXX Datasheet, PDF (12/46 Pages) Rohm – IrDA Controller LSI built-in Ir remote control

BD92747XXX
Datasheet
●IrDA Controller Functional Description
・Mode description
Three IrDA communication modes (SIR, MIR and FIR) can be set.
For details of each mode, check the following table.
Mode
Baud rate
BOF
Information
portion
CRC
EOF
Insertion and deletion
of preamble
SIR
2.4k to 115.2kbps
SW
SW
SW
SW
－
MIR
0.576M, 1.152Mbps
HW
SW
HW
HW
－
FIR
4Mbps
HW
SW
HW
HW
※ SW : Software (set by IrLAP)
※ HW : Hardware (set by BU92747XXX)
HW
・Transmission/reception method The following settings for transmission/reception can be made by setting
RX_EN, TX_EN, TX_CON, and RX_CON in the control register to 0 and 1.
TX_CON RX_CON
AUTO_FLV_CP
TX_EN
RX_EN
Mode
0
0
0
0
0
Idle mode^(Note1)
0
0
0
0
1
Reception mode
0
0
0
1
0
Transmission mode
0
0
1
0
1
Automation many windows receive mode
0
1
0
0
1
Many windows receive mode
1
0
0
(Note1)Default
※ Other setting is inhibited.
0
0
Many windows transmit mode
●Time-out
Interrupt requests are issued when a time-out occurs in the FIFO buffer under the following conditions:
1 Condition causing an MIR and FIR receive time-out
When one or more bytes of data is present in the FIFO buffer, the CPU does not read the FIFO buffer data
even though 64s has elapsed after the last writing of data into the FIFO buffer from the receive shift register.
2 Condition causing an SIR receives time-out
When one or more bytes of data is present in the receive FIFO buffer, the CPU does not read the FIFO buffer data
even though the Tout time has elapsed after the last writing of data into the FIFO buffer from
the receive shift register.
Tout = 4  (1 / Baud rate)  10
3 Condition causing an MIR and FIR transmission time-out
The CPU does not access the FIFO buffer for 1ms or more in the transmission mode.
(Except for the condition of FTLV≦FLV)
4 Condition causing a many windows transmission mode time-out
The CPU does not write data for 1ms in many windows transmit mode, after setting FTLV or writing a former DATA.
(Except for the condition of FTLV≦(FLV - FLVⅡ))
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TSZ22111・15・001
12/12
TSZ02201-0E4E0F100020-1-2
24. June. 2015 Rev.001