XR20M1170 Datasheet, PDF (3/60 Pages) Exar Corporation – I2C/SPI UART WITH 64-BYTE FIFO

REV. 1.0.0
XR20M1170
I2C/SPI UART WITH 64-BYTE FIFO
ORDERING INFORMATION
PART NUMBER
XR20M1170IL28
XR20M1170IL24
XR20M1170IL16
XR20M1170IG24
XR20M1170IG16
PACKAGE
28-pin QFN
24-pin QFN
16-pin QFN
24-Lead TSSOP
16-Lead TSSOP
OPERATING TEMPERATURE RANGE
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
DEVICE STATUS
Active
Active
Active
Active
Active
PIN DESCRIPTIONS
Pin Description
NAME
28-QFN
PIN #
24-QFN
PIN #
16-QFN
PIN #
24-TSSOP ^16-TSSOP
PIN#
PIN #
TYPE
DESCRIPTION
I2C (SPI) INTERFACE
GPIO0
1
2
-
5
-
I/O _{General purpose I/O pin.}
GPIO1
2
3
-
6
-
I/O _{General purpose I/O pin.}
I2C/SPI#
3
4
2
7
4
I/O _I2_{C-bus or SPI interface select. I}2_{C-bus inter-}
face is selected if this pin is HIGH. SPI inter-
face is selected if this pin is LOW
RX
5
5
3
8
5
I _{UART Receive Data or Infrared Receive Data.}
UART receive data input must idle HIGH. Infra-
red receive data input must idle LOW. If this
pin is not used, tie it to VCC or pull it high via a
100k ohm resistor.
TX
6
6
4
9
6
O _{UART Transmit Data or Infrared Encoder Data.}
In the standard UART Transmit Data mode,
the TX signal will be HIGH during reset or idle
(no data). In the Infrared mode, the inactive
state (no data) for the Infrared encoder/
decoder interface is LOW. If ithis pin is not
used, it should be left unconnected.
GPIO2
7
7
-
10
-
I/O _{General purpose I/O pin.}
XTAL1
9
8
5
11
7
I _{Crystal or external clock input.}
XTAL2
10
9
6
12
8
O _{Crystal or buffered clock output.}
GPIO3
11
10
-
13
-
I/O _{General purpose I/O pin.}
GND
12
11
7
14
9
Pwr _{Power supply common, ground.}
SDA
13
12
8
15
10
O _I2_{C-bus data input/output (open-drain). If SPI}
configuration is selected, then this pin is unde-
fined and must be connected to VCC.
SCL
14
13
9
16
11
I _I2_{C-bus or SPI serial input clock.}
When the I²C-bus interface is selected, the
serial clock idles HIGH. When the SPI inter-
face is selected, the serial clock idles LOW.
3