w83977ctf Winbond Electronics Corp America, w83977ctf Datasheet - Page 63

• Manufacturer Part Number: w83977ctf
• Description: Winbond I/o
• Manufacturer: Winbond Electronics Corp America

4.0 INFRARED (IR) PORTS
4.1 IR PORT
The Infrared (IR) function provides point-to-point (or multi-point to multi-point) wireless
communication which can operate under various transmission protocols including IrDA 1.0 SIR,
SHARP ASK-IR. IR port shares the same port with UART B port in W83977EF/CTF. Please refer to
section 11.5 for configuration information.
4.2 CIR PORT(For W83977CTF only)
The CIR port of the W83977CTF is an independent device, and supports an T-period mode, Over-
sampling mode and Over-sampling mode with re-sync for demodulation of cir signal. Refer to the
configuration registers for more information on disabling, address selecting and IRQ selectiing .The
function of each CIR register is described below.
4.2.1 Bank0.Reg0 - Receiver Buffer Registers (RBR) (Read)
Receiver Buffer Register is read only. When the CIR pulse train has been detected and passed by the
internal signal filter, the data samped and shifted into shifter register will write into Receiver Buffer
Register. In the CIR, this port only supports PIO mode and the address port is defined in the PnP.
4.2.2 Bank0.Reg1 - Interrupt Control Register (ICR)
Power on default <7:0> = 00000000 binary
6-3
Bit
7
2
1
0
EN_GLBI
Reserved
EN_TMR_I
En_LSR_I
EN_RX_I
Name
Read/Write
Read/Write
Read/Write
Read/Write
Read/Write
-
Enable Global Interrupt. Write 1, enable interrupt. Write
0, disable global interrupt.
Reserved
Enable Timer Interrupt.
Enable Line-Status-Register interrupt.
Receiver Thershold-Level Interrupt Enable.
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Publication Release Date: March 1999
Description
W83977EF/ CTF
PRELIMINARY
Revision A1