XR20M1170IL16 EXAR [Exar Corporation], XR20M1170IL16 Datasheet - Page 4

• Manufacturer Part Number: XR20M1170IL16
• Description: I2C/SPI UART WITH 64-BYTE FIFO
• Manufacturer: EXAR [Exar Corporation]

Pin Description
XR20M1170
I2C/SPI UART WITH 64-BYTE FIFO
RESET#
EN485#
ENIR#
GPIO5
GPIO4
GPIO6
GPIO7
DSR#
RTS#
DTR#
CTS#
N
IRQ#
VCC
CD#
CS#
RI#
A0
AME
28-QFN
P
15
16
17
18
19
20
21
22
23
24
25
26
IN
#
24-QFN
P
14
15
16
17
18
19
20
21
22
23
IN
-
-
#
16-QFN
P
10
11
12
13
14
15
IN
-
-
-
-
-
-
#
24-TSSOP
P
17
18
19
20
21
22
23
24
IN
1
2
-
-
#
16-TSSOP
P
12
13
14
15
16
4
IN
1
-
-
-
-
-
-
#
T
Pwr 2.25V to 3.6V power supply.
OD
I/O
I/O
I/O
I/O
YPE
O
I
I
I
I
I
Enable IR Mode (internal pull-up resistor). This
pin is sampled upon power-up. If this pin is
HIGH, then the TX output and RX input will
behave as the UART transmit data output and
UART receive data input. If this pin is LOW,
then the TX output and RX input will behave as
the infrared encoder data output and the infra-
red receive data input.
Enable Auto RS-485 Half-Duplex Mode (inter-
nal pull-up resistor). This pin is sampled upon
power-up. If this pin is HIGH, then the RTS#
output can be used for Auto RTS Hardware
Flow Control or as a general purpose output. If
this pin is LOW, then the RTS# output is the
Auto RS-485 Half-Duplex direction control pin.
Interrupt output (open-drain, active LOW).
UART Request-To-Send. This output can be
used for Auto RTS Hardware Flow Control,
Auto RS-485 Half-Duplex direction control or
as a general purpose output.
General purpose I/O pin or DTR# output.
General purpose I/O pin or DSR# input.
Reset (active LOW) - A longer than 40 ns LOW
pulse on this pin will reset the internal registers
and all outputs. The UART transmitter output
will be idle and the receiver input will be
ignored.
UART Clear-To-Send. This input can be used
for Auto CTS Hardware Flow Control or as a
general purpose input.
General purpose I/O pin or CD# input.
General purpose I/O pin or RI# input.
I
select. If I
pin along with the A1 pin allows user to change
the device’s base address. If SPI configuration
is selected, this pin is the SPI chip select pin
(Schmitt-trigger, active LOW).
2
C-bus device address select A0 or SPI chip
2
C-bus configuration is selected, this
D
ESCRIPTION
REV. 1.0.0