W83977F Datasheet, PDF (21/181 Pages) Winbond – PLUG & PLAY 1.0A COMPLIANT

W83977F/ W83977AF
PRELIMINARY
1.3 Serial Port Interface, continued
SYMBOL PIN
I/O
DTRB
51
I/O_8t
ENCPNP
SINA
SINB
SOUTA
PENKRC
45,
IN_t
52
46
I/O_8t
SOUTB
DCDA
DCDB
RIA
RIB
53
I/O_8t
47
IN_t
54
65
IN_t
66
FUNCTION
UART B Data Terminal Ready. An active low signal informs the
modem or data set that controller is ready to communicate.
During power-on reset, this pin is pulled down internally and is
defined as ENCPNP, which provides the power-on value for
CR24 bit 1 (ENPNP). A 4.7 kΩ is recommended if intends to
pull up. (enable comply PnP mode)
Serial Input. Used to receive serial data through the
communication link.
UART A Serial Output. Used to transmit serial data out to the
communication link.
During power-on reset, this pin is pulled down internally and is
defined as PENKRC, which provides the power-on value for
CR24 bit 2 (ENKBRTC). A 4.7 kΩ is recommended if intends to
pull up. (enable KBC and RTC)
UART B Serial Output. Used to transmit serial data out to the
communication link.
Data Carrier Detect. An active low signal indicates the modem
or data set has detected a data carrier.
Ring Indicator. An active low signal indicates that a ring signal is
being received from the modem or data set.
1.4 Infrared Interface
SYMBOL PIN
I/O
IRRX (SINC) 37
IN_cs
IRTX
(SOUTC)
38 OUT_12t
IRRXH
IRSL0
GP25
(GA20)
39
I/O_12t
OUT_12t
I/O_12t
CTSC
CIRRX
40
GP24 (P16)
IN_t
IN_t
I/O_12t
P13
I/O_12t
FUNCTION
Infrared Receiver input. It functions as SIN input if UART C is
configured as a simple serial port. [W83977AF only]
Infrared Transmitter Output. It functions as SOUT output if
UART C is configured as a simple serial port. [W83977AF only]
CR2A bit3, 2=00 (default): High speed IR receiving terminal.
CR2A bit3, 2=01: IR module select 0.
CR2A bit3, 2=10: General purpose I/O port 2, bit 5. It can be
configured as GATE A20 (Keyboard P21).
CR2A bit3, 2=11: CTS input of UART C. [W83977AF only]
CR2A bit5, 4=00 (default): Consumer IR receiving terminal.
CR2A bit5, 4=01: General purpose I/O port 2, bit 4. It can be
configured as Keyboard P16 I/O port.
CR2A bit5, 4=10: Keyboard P13 I/O
Publication Release Date: March 1998
-10-
Revision 0.58