参数资料
型号: 37C669
厂商: SMSC Corporation
英文描述: DIODE SCHOTTKY SINGLE 25V 200mW 0.5V-vf 200mA-IFM 30mA-IF 2uA-IR SOD-323 3K/REEL
中文描述: 电脑98/99顺从超级I / O软盘控制器与红外线支持
文件页数: 154/164页
文件大小: 621K
代理商: 37C669
9
DESCRIPTION OF PIN FUNCTIONS
QFP/
TQFP
PIN NO.
NAME
SYMBOL
BUFFER
TYPE
DESCRIPTION
89
Transmit Data 2
TXD2/IRTX
O24
Transmit serial data output for port 2. IR
transmit data.
78
Receive Data 1
RXD1
I
Reciever serial data input for port 1.
79
Transmit Data 1
TXD1
024
Transmit serial data output for port 1.
81,91
nRequest to
Send
(System Option)
nRTS1
nRTS2
(SYSOPT)
O4
Active low Request to Send outputs for the
Serial
Port.
Handshake
output
signal
notifies modem that the UART is ready to
transmit
data.
This
signal
can
be
programmed by writing to bit 1 of Modem
Control Register (MCR).
The hardware
reset will reset the nRTS signal to inactive
mode (high).
Forced inactive during loop
mode operation.
At the trailing edge of hardware reset, the
nRTS2 input is latched to determine the
configuration base address.
0 : INDEX Base I/O Address = 3F0 Hex
1 : INDEX Base I/O Address = 370 Hex
83,93
nData Terminal
Ready
nDTR1
nDTR2
O4
Active low Data Terminal Ready outputs for
the serial port.
Handshake output signal
notifies modem that the UART is ready to
establish data communication link.
This
signal can be programmed by writing to bit
0 of Modem Control Register (MCR). The
hardware reset will reset the nDTR signal to
inactive mode (high).
Forced inactive
during loop mode operation.
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