xr17l152im Exar Corporation, xr17l152im Datasheet - Page 5

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

XR17L152
3.3V PCI BUS DUAL UART
REV. 1.1.0
PIN DESCRIPTIONS
N
OTE
TMRCK
EN485#
TEST#
: Pin type: I=Input, O=Output, I/O= Input/output, OD=Output Open Drain.
XTAL1
XTAL2
N
ENIR
GND
VCC
VI/O
NC
AME
10, 22, 32, 43,
44, 53, 78, 88
1, 11, 23, 33,
89, 100
54, 80
63, 64
P
77
76
75
74
65
79
IN
#
PWR
PWR
PWR
T
YPE
O
I
I
I
I
I
Crystal or external clock input of up to data rate of 3.125Mbps at 33MHz 3.3V
and 8X sampling. See AC Characterization table. Caution: this input is not 5V
tolerant.
Crystal or buffered clock output.
16-bit timer/counter external clock input.
Global Infrared mode enable (active high). During power up or reset, this pin
is sampled and if it is a logic high, both UARTs are set for infrared mode. Also,
the infrared mode bit, MCR[6], is set in both channels. Software can override
this pin thereafter and enable or disable infrared mode.
Global AutoRS485 half-duplex direction control enable (active low). During
power up or reset, this pin is sampled and if it is a logic high, both UARTs are
set for Auto RS485 Mode. Also, the Auto RS485 bit, FCTR[5], is set in both
channels. Software can override this pin thereafter and enable or disable it.
Factory Test. Connect to VCC for normal operation.
5V or 3.3V power supply for the core logic.
PCI bus I/O power supply. 3.3V ONLY (PCI 2.2 Compliance).
Power supply common, ground.
No Connection.
5
D
ESCRIPTION
DISCONTINUED
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