xr17l152im Exar Corporation, xr17l152im Datasheet - Page 4

• Manufacturer Part Number: xr17l152im
• Description: 3.3v Pci Bus Dual Uart
• Manufacturer: Exar Corporation

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DISCONTINUED
PIN DESCRIPTIONS
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ANCILLARY SIGNALS
MPIO0-MPIO7
DSR0#
DTR1#
DSR1#
RTS1#
CTS1#
EEDO
EECK
EECS
N
CD0#
CD1#
EEDI
RI0#
RI1#
RX1
TX1
AME
52-45
P
68
69
70
62
55
60
56
61
57
58
59
84
83
82
81
IN
#
T
I/O
YPE
O
O
O
O
O
O
I
I
I
I
I
I
I
I
I
UART channel 0 Data Set Ready or general purpose input (active low). This
input should be connected to VCC when not used.
UART channel 0
This input should be connected to VCC when not used.
UART channel 0 Ring Indicator or general purpose input (active low). This
input should be connected to VCC when not used.
UART channel 1 Transmit Data or infrared transmit data. Normal TXD output
idles at logic 1 condition while infrared TXD output idles at a logic 0 condition.
UART channel 1 Receive Data or infrared receive data. Normal RXD input
idles at logic 1 condition while infrared RXD input idles at a logic 0 condition.
In the infrared mode, the polarity of the incoming RXD signal can be selected
via FCTR bit-4. If this bit is a logic 0, logic 0 on the RXD input is considered a
mark and if this bit is a logic 1, a logic 0 on the RXD input is considered a
space.
UART channel 1 Request to Send or general purpose output (active low). If
this output is not used, leave it unconnected.
UART channel 1 Clear to Send or general purpose input (active low). This
input should be connected to VCC when not used.
UART channel 1 Data Terminal Ready or general purpose output (active low).
If this output is not used, leave it unconnected.
UART channel 1 Data Set Ready or general purpose input (active low). This
input should be connected to VCC when not used.
UART channel 1 Carrier Detect or general purpose input (active low). This
input should be connected to VCC when not used.
UART channel 1 Ring Indicator or general purpose input (active low). This
input should be connected to VCC when not used.
Multi-purpose inputs/outputs 0-7. The function of these pin are defined thru
the Configuration Register MPIOSEL, MPIOLVL, MPIOINV, MPIO3T and
MPIOINT
Serial clock to EEPROM. Pin has a weak internal pull-down resistor and
requires an external 10K resistor to operate correctly with the EEPROM. An
internal clock of CLK divide by 256 is used for reading the vendor and sub-
vendor ID and model number during power up or reset. However, it can be
manually clocked thru the Configuration Register REGB.
Chip select to a EEPROM device like 93C46. It is manually selectable thru the
Configuration Register REGB. Requires a pull-up 4.7K ohm resister for exter-
nal sensing of EEPROM during power up. See DAN112 for further details.
Write data to EEPROM device. It is manually accessible thru the Configura-
tion Register REGB. The L152 auto-configuration register interface logic uses
the 16-bit format.
Read data from EEPROM device. It is manually accessible thru the Configu-
ration Register REGB.
4
Carrier Detect or general purpose input (active low).
D
ESCRIPTION
3.3V PCI BUS DUAL UART
XR17L152
REV. 1.1.0