W83977G-A Nuvoton Technology Corporation of America, W83977G-A Datasheet - Page 18
W83977G-A
Manufacturer Part Number
W83977G-A
Description
IC I/O CONTROLLER 128-PQFP
Manufacturer
Nuvoton Technology Corporation of America
Datasheet
1.W83977G-A.pdf
(182 pages)
Specifications of W83977G-A
Pin Count
128
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
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Serial Port Interface, continued.
4.4
SOUTA
PENKRC
SOUTB
DCDA
DCDB
IRRX (SINC)
IRTX
(SOUTC)
IRRXH
IRSL0
GP25 (GA20)
CIRRX
GP24 (P16)
P13
RIA
RIB
CTSC
SYMBOL
SYMBOL
W83977F-A/ W83977G-A/ W83977AF-A/ W83977AG-A
Infrared Interface
PIN
PIN
53
47
54
65
66
46
37
38
39
40
OUT 12t
OUT 12t
I/O 12t
I/O 12t
I/O 12t
I/O 12t
I/O 8t
I/O
IN cs
I/O
IN
IN
I/O
IN t
IN t
8t
t
t
UART A Serial Output.
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.
Infrared Receiver input.
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:
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
-10
CTS
input of UART C. [W83977AF only]
It functions as SIN input if UART C is
Used to transmit serial data out to the
FUNCTION
FUNCTION
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