SB16C1054PCI_Data Sheet_EN

SB16C1054PCI
PCI Target Interface Controller
with Quad-UART
JULY 2013 REV 1.04
10
Table 6–1: Pin Description
Modem and Serial I/O Interface
Name
Pin
Type
Description
TXD0
TXD1
TXD2
TXD3
23
13
1
130
O
O
O
O
Transmit Data: These pins are individual transmit data output. During the
local loop-back mode, the TXD output pin is disabled and TXD data is
internally connected to the RXD input.
RXD0
RXD1
RXD2
RXD3
26
16
4
133
I
I
I
I
Receive Data: These pins are individual receive data input. During the local
loop-back mode, the RXD input pin is disabled and RXD data is internally
connected to the TXD output.
RTS0#
RTS1#
RTS2#
RTS3#
24
14
2
131
O
O
O
O
Request to Send (active low): These pins indicate that the UART is ready to
send data to the modem, and affect transmit and receive operations only when
Auto-RTS function is enabled.
CTS0#
CTS1#
CTS2#
CTS3#
29
17
5
134
I
I
I
I
Clear to Send (active low): These pins indicate the modem is ready to
accept transmitted data from the UART, and affect transmit and receive
operations only when Auto-CTS function is enabled.
DTR0#
DTR1#
DTR2#
DTR3#
25
15
3
132
O
O
O
O
Data Terminal Ready (active low): These pins indicate UART is ready to
transmit or receive data.
DSR0#
DSR1#
DSR2#
DSR3#
30
18
6
137
I
I
I
I
Data Set Ready (active low): These pins indicate modem is powered-on and
is ready for data exchange with UART.
DCD0#
DCD1#
DCD2#
DCD3#
31
19
7
138
I
I
I
I
Carrier Detect (active low): These pins indicate that a carrier has been
detected by modem.
RI0#
RI1#
RI2#
RI3#
32
20
8
139
I
I
I
I
Ring Indicator (active low): These pins indicate the modem has received a
ringing signal from telephone line. A low to high transition on these input pins
generates a modem status interrupt, if enabled.
TXEN0
TXEN1
TXEN2
TXEN3
33
21
11
140
O
O
O
O
TX Enable: These pins are for auto tri-state control of the RS422 or RS485
communication. When serial date is transmitted to TXD, the value set on
ATR[5] is transmitted. These pins eliminate additional glue logic outside.
RXEN0#
RXEN1#
RXEN2#
RXEN3#
34
22
12
141
O
O
O
O
RX Enable: This pins are for auto tri-state control of the RS422 or RS485
communication. When serial date is transmitted to TXD, the value set on
ATR[7] is transmitted. These pins eliminate additional glue logic outside.