w83977atf Winbond Electronics Corp America, w83977atf Datasheet - Page 78

• Manufacturer Part Number: w83977atf
• Description: Winbond I/o
• Manufacturer: Winbond Electronics Corp America

Advanced IR Register:
Bit 7~5
Bit 4:
Bit 3:
Bit 2:
Bit 1, 0:
Advanced SIR/ASK-IR, MIR, FIR, Remote Controller Modes:
MIR, FIR Modes:
Other Modes: Not used.
MIR, FIR modes:
Other Modes: Not used.
MIR, FIR modes:
Other modes: Not used.
AD_MD2~0 - Advanced IR/Infrared Mode Select.
These registers are active when Advanced IR Select (ADV_SL, in Set2.Reg2.Bit0) is set
to 1.
occurs, these registers will be reset to 0 and fall back to legacy IR mode.
SIR_PLS - Send Infrared Pulse
Writing 1 to this bit will send a 2 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.
TX_WT - Transmission Waiting
If this bit is set to 1, the transmitter will wait for TX FIFO to reach threshold level or
transmitter time-out before it begins to transmit
bytes from transmitting prematurely. This is to avoid Underrun.
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.
RTS, DTR
Functional definitions are the same as in legacy IR mode.
Operational mode selection is defined as follows.
AD_MD2~0 (Bit 7, 6, 5)
000
001
010
011
100
101
110
111
- 59 -
High Speed MIR (1.152M bps)
Low speed MIR (0.576M bps)
data;
Advanced ASK-IR
Selected Mode
Advanced SIR
Consumer IR
FIR (4M bps)
Reserved
Reserved
this prevents short queues of data
Publication Release Date:April 1998
When backward operation
W83977ATF
PRELIMINARY
Revision 0.52