XR17D158_05 Datasheet, PDF (4/73 Pages) Exar Corporation – UNIVERSAL (3.3V AND 5V) PCI BUS OCTAL UART

XR17D158
UNIVERSAL (3.3V AND 5V) PCI BUS OCTAL UART
PIN DESCRIPTIONS
xr
REV. 1.2.2
NAME
RI0#
TX1
RX1
RTS1#
CTS1#
DTR1#
DSR1#
CD1#
RI1#
TX2
RX2
RTS2#
CTS2#
DTR2#
DSR2#
CD2#
PIN #
128
117
124
119
123
118
122
121
120
106
99
104
100
105
101
102
TYPE
DESCRIPTION
I UART channel 0 Ring Indicator or general purpose input (active low).
O ^{UART channel 1 Transmit Data or infrared transmit data. Normal TXD output}
idles HIGH while infrared TXD output idles LOW.
I ^{UART channel 1 Receive Data or infrared receive data. Normal RXD input}
idles HIGH. The infrared pulses typically idle LOW but can be inverted inter-
nally prior the decoder by FCTR[4].
O UART channel 1 Request to Send or general purpose output (active low).
I UART channel 1 Clear to Send or general purpose input (active low).
O UART channel 1 Data Terminal Ready or general purpose output (active low).
I UART channel 1 Data Set Ready or general purpose input (active low).
I UART channel 1 Carrier Detect or general purpose input (active low).
I UART channel 1 Ring Indicator or general purpose input (active low).
O ^{UART channel 2 Transmit Data or infrared transmit data. Normal TXD output}
idles HIGH while infrared TXD output idles LOW.
I ^{UART channel 2 Receive Data or infrared receive data. Normal RXD input}
idles HIGH. The infrared pulses typically idle LOW but can be inverted inter-
nally prior the decoder by FCTR[4].
O UART channel 2 Request to Send or general purpose output (active low).
I UART channel 2 Clear to Send or general purpose input (active low).
O UART channel 2 Data Terminal Ready or general purpose output (active low).
I UART channel 2 Data Set Ready or general purpose input (active low).
I UART channel 2 Carrier Detect or general purpose input (active low).
RI2#
TX3
RX3
RTS3#
CTS3#
DTR3#
DSR3#
CD3#
RI3#
TX4
RX4
103
I UART channel 2 Ring Indicator or general purpose input (active low).
98
O ^{UART channel 3 Transmit Data or infrared transmit data. Normal TXD output}
idles HIGH while infrared TXD output idles LOW.
91
I ^{UART channel 3 Receive Data or infrared receive data. Normal RXD input}
idles HIGH. The infrared pulses typically idle LOW but can be inverted inter-
nally prior the decoder by FCTR[4].
96
O UART channel 3 Request to Send or general purpose output (active low).
92
I UART channel 3 Clear to Send or general purpose input (active low).d.
97
O UART channel 3 Data Terminal Ready or general purpose output (active low).
93
I UART channel 3 Data Set Ready or general purpose input (active low).
94
I UART channel 3 Carrier Detect or general purpose input (active low).
95
I UART channel 3 Ring Indicator or general purpose input (active low).
88
O ^{UART channel 4 Transmit Data or infrared transmit data. Normal TXD output}
idles HIGH while infrared TXD output idles LOW.
81
I ^{UART channel 4 Receive Data or infrared receive data. Normal RXD input}
idles HIGH. The infrared pulses typically idle LOW but can be inverted inter-
nally prior the decoder by FCTR[4].
4