w83977atg Winbond Electronics Corp America, w83977atg Datasheet - Page 66

• Manufacturer Part Number: w83977atg
• Description: W83877tf Plus Kbc, Gp I/o, Wake-up, Fir, Cir, Pb-free
• Manufacturer: Winbond Electronics Corp America

Legacy IR Register:
This register controls the pins of IR used for handshaking with peripherals such as modem, and
controls the diagnostic mode of IR.
Bit 4: When this bit is set to logical 1, the legacy IR enters diagnostic mode by an internal loopback:
Bit 3: The legacy IR interrupt output is enabled by setting this bit to logic 1.
Advanced IR Register:
Bit 7~5
Bit 4:
Bit 3:
IRTX is forced to logical 0, and IRRX is isolated from the communication link instead of the
TSR.
AD_MD2~0 (BIT 7, 6, 5)
Advanced SIR/ASK-IR, MIR, FIR, Remote Controller Modes:
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. Operational mode selection is defined as follows. When backward operation
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
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 data; this prevents short queues of data
bytes from transmitting prematurely. This is to avoid Underrun.
000
001
010
011
100
101
110
111
μ
s long infrared pulse after physical frame end. This is
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W83977ATF/W83977ATG
High Speed MIR (1.152M bps)
Low speed MIR (0.576M bps)
SELECTED MODE
Advanced ASK-IR
Advanced SIR
Consumer IR
FIR (4M bps)
Reserved
Reserved