DataSheet_SB16C1053APCI_v106

SB16C1053APCI
PCI Target Controller with 2 Serial, 1 Parallel and MIO Bus
PCI to 2S+1P with MIO Bus Bridge
JULY 2013 REV 1.06
14
6.2 Pin Description
Table 6–1: Pin Description
Modem and Serial I/O Interface
Name
Pin
Type
Description
TXD0
TXD1
95
87
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
100
90
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#
98
88
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#
104
94
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#
99
89
O
O
Data Terminal Ready (active low): These pins indicate UART is ready to
transmit or receive data.
DSR0#
DSR1#
102
92
I
I
Data Set Ready (active low): These pins indicate modem is powered-on and
is ready for data exchange with UART.
DCD0#
DCD1#
103
93
I
I
Carrier Detect (active low): These pins indicate that a carrier has been
detected by modem.
RI0#
RI1#
101
91
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_INTF00
TXEN1_INTF10
48
50
I/O
I/O
These pin are dual mode pins. After power is supplied to the chip, the pin is
set to input mode for a while and receive INTFx[2:0] input. After that, the pins
are set to output mode and outputs TXENx as auto toggle.
TX Enable: These pins are for auto tri-state control of the RS422 or RS485
communication. When serial data is transmitted to TXD, the value set on
ATR[5] is transmitted. These pins eliminate additional glue logic outside.
Line Interface Type Select: These pins are used to select the type of Line
Transceiver interfaced in Serial port Mode. The inputted value from these pins
is shown in IIR0[5:4] of the Option register.
In 1S, 2S ALL+ mode, INTF0[2:0] are for 1
st
serial port and INTF1[2:0] are for
2
nd
serial port.
In 4S and 6S ALL+ mode, INTF0[2:0] are for 1
st
, 3
rd
, 5
th
serial ports and
INTF1[2:0] are for 2
nd
, 4
th
, 6
th
serial port. In this case, the chip read the
interface settings sequentially using GPO[1:0] output.
000b: RS232 interface is selected.
100b: RS422 1:1 interface is selected.
101b: RS422 Multi-Drop interface is selected.
110b: RS485 Non-Echo interface is selected.