W83977F-A Datasheet, PDF (64/182 Pages) Winbond – WINBOND I/O

W83977F-A/ W83977G-A/ W83977AF-A/ W83977AG-A
AD_MD2~0
(BIT 7, 6, 5)
000
001
010
011
100
101
110
111
SELECTED MODE
Reserved
Low speed MIR (0.576M bps)
Advanced ASK-IR
Advanced SIR
High Speed MIR (1.152M bps)
FIR (4M bps)
Consumer IR
Reserved
Bit 4:
Bit 3:
MIR, FIR Modes:
SIR_PLS - Send Infrared Pulse
Writing 1 to this bit will send a 2 μ s long infrared pulse after physical frame end. This is to
signal to SIR that the high speed infrared is still in. This bit will be auto cleared by
hardware.
Other Modes: Not used.
MIR, FIR modes:
TX_WT - Transmission Waiting
If this bit is set to 1, the transmitter will wait for TX FIFO reaching threshold level or
transmitter time-out before it begins to transmit data which prevents short queues of data
bytes from transmitting prematurely. This is to avoid Underrun.
Other Modes: Not used.
Bit 2: MIR, FIR modes:
EN_DMA - Enable DMA
Enable DMA function for transmitting or receiving. Before using this, the DMA channel
should be selected first. If only RX DMA channel is set and TX DMA channel is disabled,
then the single DMA channel is used. In the single channel system, the bit of D_CHSW
(DMA channel swap, in Set 2.Reg2.Bit3) will determine if it is RX_DMA or TX_DMA
channel.
Other modes: Not used.
Bit 1, 0: RTS, DTR
Functional definitions is the same as in legacy IR mode.
-56