BU92747XXX Datasheet, PDF (22/46 Pages) Rohm – IrDA Controller LSI built-in Ir remote control

BD92747XXX
Datasheet
●FT: FIFO Trigger Level
The FTLV register sets the number of data items to be written to FIFO.
FTLV12 FTLV11 FTLV10 FTLV9 FTLV8 FTLV7 FTLV6 FTLV5 FTLV4 FTLV3 FTLV2 FTLV1 FTLV0
This register sets the number of transmission data items in a range from 0 to 5119.
Set the number of transmission data items in this register before transmission.
FTLV
●FLV: FIFO Level
The FLV register indicates the number of data items in FIFO.
FLV12 FLV11 FLV10 FLV9
FLV8
FLV7
FLV6
FLV5
FLV4
FLV3
FLV2
FLV1
FLV0
FLV
This register indicates the number of data items stored in the FIFO buffer in a range from 0 to 5119.
At the end of data transmission, FLV is automatically set to 0. (Because data writing by CPU takes place in units of
even bytes, an even number (byte) is indicated during data transmission.)
●FLVⅡ: FIFO Level
The FLVⅡregister indicates the number of data items in FIFO.
FLVⅡ FLVⅡ FLVⅡ FLVⅡ FLVⅡ FLVⅡ FLVⅡ FLVⅡ FLVⅡ FLVⅡ FLVⅡ FLVⅡ FLVⅡ
12
11
10
9
8
7
6
5
4
3
2
1
0
FLVⅡ
In the MIR and FIR many windows receive mode or AUTO_FLV_CP mode, the number of preceding frame data is indicated
by any number from 0 to 5119.
In the many windows transmit mode, the number of transmitting frame data is indicated by any number from 0 to 5119.
●FLVⅢ: FIFO Level
The FLVⅢ register indicates the number of data items in FIFO.
FLVⅢ FLVⅢ FLVⅢ FLVⅢ FLVⅢ FLVⅢ FLVⅢ FLVⅢ FLVⅢ FLVⅢ FLVⅢ FLVⅢ FLVⅢ
12
11
10
9
8
7
6
5
4
3
2
1
0
When data exists in FLVⅡ, FLVⅢ indicates the number of data bytes of the following frames
that do the reception completion in AUTO_FLV_CP mode.
FLVⅢ
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TSZ22111・15・001
22/22
TSZ02201-0E4E0F100020-1-2
24. June. 2015 Rev.001