W83877ATG Nuvoton Technology Corporation of America, W83877ATG Datasheet - Page 15

• Manufacturer Part Number: W83877ATG
• Manufacturer: Nuvoton Technology Corporation of America

Specifications of W83877ATG

• Lead Free Status / RoHS Status: Supplier Unconfirmed

1.2 Serial Port Interface, continued
SINA
SINB
IRRX1
SOUTA
SOUTB
IRTX1
PHEFRAS
PPNPCVS
RTSB
PGOIQSEL
IRTX2
IRRX2
DTRA
DTRB
RTSA
PEN16SA
SYMBOL
PIN
30
42
38
43
35
46
36
45
95
94
OUT
I/O
I/O
I/O
I/O
I/O
I/O
I/O
IN
IN
IN
IN
IN
IN
IN
IN
IN
12t
8tc
8tc
8tc
8tc
t
t
t
t
t
t
8t
t
t
t
12t
Serial Input of COM A. Used to receive serial data from the
communication link.
Serial Input of COM B. Used to receive serial data from the
communication link.
When infrared function is selected, acts as infrared input.
UART A Serial Output. Used to transmit serial data out to the
communication link.
During power-on reset, this pin is pulled up internally and is
defined as PEN16SA, which provides the power-on value for
CR2E.bit6 ( PEN16SA ). A 4.7 k Ω is recommended when
intending to pull down at power-on reset.
UART B Serial Output. Used to transmit serial data out to the
communication link.
Infrared serial data output when COM B acts as infrared port.
UART A Data Terminal Ready. An active low informs the modem
or data set that the controller is ready to communicate.
During power-on reset, this pin is pulled down internally and is
defined as PHEFRAS, which provides the power-on value for
CR16 bit 0 (HEFRAS), and Configuration Port is defined at 250h.
A 4.7 k Ω is recommended when intending to pull up at power-on
reset, and Configuration Port is defined at 3F0h.
UART B Data Terminal Ready. An active low informs the modem
or data set that controller is ready to communicate.
UART A Request To Send. An active low informs the modem or
data set that the controller is ready to send data.
During power-on reset, this pin is pulled up internally and is
defined as PPNPCVS, which provides the power-on value for
CR16 bit 2 (PNPCVS). A 4.7 k Ω is recommended when
intending to pull down at power-on reset.
UART B Request To Send. An active low informs the modem or
data set that the controller is ready to send data.
During power-on reset, this pin is pulled down internally and is
defined as PGOIQSEL, which provides the power-on value for
CR16 bit 4 (GOIQSEL). A 4.7 k Ω is recommended when
intending to pull up at power-on reset.
Function as a InfraRed transmission data line.
Function as a InfraRed receiving line.
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W83877ATF/W83877ATG
FUNCTION