W83637HF Datasheet, PDF (23/149 Pages) Winbond – LPC I/O

W83637HF
Serial Port Interface, continued
SYMBOL PIN
I/O
DTRB#
81
O_8c
SINA
SINB
SOUTA
53
IN_t
82
54
O_8c
PENKBC
INcd
SOUTB
PEN48
DCDA#
DCDB#
RIA#
RIB#
83
O_8c
INcd
56
IN_t
84
57
IN_t
85
FUNCTION
UART B Data Terminal Ready. An active low signal informs the
modem or data set that controller is ready to communicate.
Serial Input. It is used to receive serial data through the
communication link.
UART A Serial Output. It is used to transmit serial data out to the
communication link.
During power-on reset, this pin is pulled down internally and is
defined as PENKBC, which provides the power-on value for CR24
bit 2 (PENKBC). A 4.7 kΩ resistor is recommended if intends to
pull up. (enable KBC)
UART B Serial Output. During power-on reset, this pin is pulled
down internally and is defined as PEN48, which provides the
power-on value for CR24 bit 6 (EN48). A 4.7 kΩ resistor is
recommended if intends to pull up.
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.
5.5 KBC Interface
SYMBOL
GA20M
KBRST
KCLK
KDAT
MCLK
MDAT
PIN
I/O
FUNCTION
59
O16t Gate A20 output. This pin is high after system reset. (KBC P21)
60
O16t Keyboard reset. This pin is high after system reset. (KBC P20)
62 I/OD_16cs Keyboard Clock.
63 I/OD_16cs Keyboard Data.
65 I/OD_16cs PS2 Mouse Clock.
66 I/OD_16cs PS2 Mouse Data.
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Publication Release Date: June 25, 2003
Revision 1.3