W83877ATF Datasheet, PDF (53/191 Pages) Winbond – enhanced version from Winbonds most popular I/O chip W83877F

W83877ATF
3.3 IR Port
In the W83877AF includes two serial ports, that is, UART A and UART B. The second serial port,
UART B, also has built-in Infrared (IR) functions which include IrDA 1.0 SIR, IrDA 1.1 MIR (1.152M
bps), IrDA FIR (4M bps), SHARP ASK-IR, and remote control (that support NEC, RC-5, advanced
RC-5, and RECS-80 protocol).
4.3.1 Advanced UART B Register Description
When bank select enable bit (ENBNKSEL, in CR2C.bit3) is set, UART B will be switched to Advanced
UART B, and eight Register Sets can be accessed. These Register Sets control enhanced UART B,
IR function switching such as SIR, MIR, or FIR. Also, a superior traditional UART B function can be
used, such as 32-byte transmitter/receiver FIFO, non-encoding IRQ identify status register, and
automatic flow control. The MIR/FIR and remote control registers are also defined in these Register
Sets. The structure of he Register Sets is shown below.
Reg 7
Reg 6
Reg 5
Reg 4
BDL/SSR
Reg 2
Reg 1
Reg 0
Set 0
Set 1
Set 2
Set 3
Set 4
Set 5
Set 6
Set 7
All in one Reg
to Select SSR
*Set 0, 1 are legacy/Advanced UART Registers
*Set 2~7 are Advanced UART Registers
- 49 -
Publication Release Date: April 1998
Version 0.51