W83877ATF Datasheet, PDF (59/191 Pages) Winbond – enhanced version from Winbonds most popular I/O chip W83877F

W83877ATF
Legacy UART Register: These registers are defined the same as in the previous description.
Advanced UART Register:
Bit 7~5 Advanced UART/SIR/ASK-IR, MIR, FIR, Remote Controller modes:
AD_MD2~0 - Advanced UART/Infrared mode Select.
These registers are active when Advanced UART Select (ADV_SL, in Set2.Reg2.Bit0) is
set to 1. Operational mode selection is defined as follows. When the backward operation
occurs these register will be reset to 0 and backward legacy UART mode.
AD_MD2~0
(Bit 7, 6, 5)
000
001
010
011
100
101
110
111
Selected Mode
Advanced UART
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
Write to 1 then automatically sends a 2 µ s infrared pulse after physical frame end,. In
order to notify SIR that the high speed infrared is still in process when this pulse is sent.
This bit will be automatically cleared by hardware.
Other modes:
Not used.
MIR, FIR modes:
TX_WT - Transmission Waiting
If this bit sets to 1, the transmitter will wait for TX FIFO to reach threshold level or
transmitter time-out which avoids short data bytes to want to transmit, before beginning to
transmit data from TX FIFO. This is in order to avoid Underrun.
Other modes:
Not used.
- 55 -
Publication Release Date: April 1998
Version 0.51