BU92747XXX Datasheet, PDF (28/46 Pages) Rohm – IrDA Controller LSI built-in Ir remote control

BD92747XXX
Datasheet
●DESCRIPTION OF REGISTER FUNCTION
Address 00h (Read/Write)
Description
Initial
value
Operation
Operational mode
D5
(Opm)
Selection of
operational mode
0: When transmission buffer is null, interrupt is generated.
0
1: When output register data is transmitted to transmission buffer,
interrupt is generated.
D4
(Divs)
D3
(Irqe)
D2
(Inv1)
D1
(Inv0)
D0
(Pwr)
Selection of divider
Permission of interrupt
Data output period,
reversal of Lo period
(Data1)
Data output period,
revered of Lo period
(Data0)
Control of clock buffer
Divider in the system clock generator
0: Carrier divider.
0
1: Base clock divider.
The system clock frequency is a reference of period setting for each
part except carrier part (Clo, Chi).
Interrupt mode
0: Mask Mode, NIRQ pin output “HIGH”.
0
1: Permit Mode, NIRQ pin output “LOW” when this bit is “1” and the
transmission buffer is null.
Data1 output format
0
0: In Data1 output, Lo part follows carrier freq.
1: In Data1 output, carrier freq. follows Lo part.
Data0 output format
0
0: In Data0 output, Lo part follows carrier freq.
1: In Data0 output, carrier freq. follows Lo part.
Clock buffer (CLKI pin) power down control
0: Power down to stop the internal clock. DOUT pin outputs “LOW”
0
and NIRQ pin outputs “HIGH”.
1: Power up.
Address 01h (Read/Write)
Description
D5
(Frmb)
Base of
frame interval
D4
(Frme)
Control of frame interval
D3-D0
(Rpt)
Repetition times
Initial
value
Operation
Base of frame interval
0: A start of header is selected as base of frame interval.
0
1: Ah end of End parts selected as base of frame interval.
Frame interval (FrmLen) sets up a time from base of frame interval to
the following start of header.
Frame interval
0
0: Disable
1: Enable, It enables the time interval to set from the current
transmission data to the next data.
IrRC (or IrTX) output times control
1h
The setting value of this register is the repetition times (When
Rpt=0h, the repetition times is 16). In case of setting this register, set
Frme and FrmLen.
Address 02h (Read/Write)
Description
D7-D0
(Base)
Base clock frequency
dividing
Initial
value
Operation
Base clock frequency control
00h
(Base clock cycle) = 1/ (XIN input freq.÷3) [Sec] (Base=00h),
(Base clock cycle)
= (2×Base) / (XIN input freq.÷3) [sec] (except for above).
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TSZ02201-0E4E0F100020-1-2
24. June. 2015 Rev.001