xr20m1170 Exar Corporation, xr20m1170 Datasheet - Page 3

• Manufacturer Part Number: xr20m1170
• Description: I2c/spi Uart With 64-byte Fifo
• Manufacturer: Exar Corporation

Pin Description
REV. 1.0.0
ORDERING INFORMATION
PIN DESCRIPTIONS
I2C (SPI) INTERFACE
I2C/SPI#
GPIO0
GPIO1
GPIO2
XTAL1
XTAL2
GPIO3
N
GND
SDA
SCL
RX
TX
AME
XR20M1170IG24
XR20M1170IG16
XR20M1170IL28
XR20M1170IL24
XR20M1170IL16
P
ART
28-QFN
N
P
UMBER
10
11
12
13
14
IN
1
2
3
5
6
7
9
#
24-QFN
P
10
12
13
IN
11
2
3
4
5
6
7
8
9
#
16-QFN
24-Lead TSSOP
16-Lead TSSOP
P
28-pin QFN
24-pin QFN
16-pin QFN
IN
2
3
4
5
6
7
8
9
-
-
-
-
P
#
ACKAGE
24-TSSOP
P
10
11
12
13
14
15
16
IN
5
6
7
8
9
#
16-TSSOP
O
PERATING
P
10
3
IN
11
4
5
6
7
8
9
-
-
-
-
#
-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
T
T
Pwr Power supply common, ground.
I/O
I/O
I/O
I/O
I/O
YPE
EMPERATURE
O
O
O
I
I
I
General purpose I/O pin.
General purpose I/O pin.
I
face is selected if this pin is HIGH. SPI inter-
face is selected if this pin is LOW
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.
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.
General purpose I/O pin.
Crystal or external clock input.
Crystal or buffered clock output.
General purpose I/O pin.
I
configuration is selected, then this pin is unde-
fined and must be connected to VCC.
I
When the I
serial clock idles HIGH. When the SPI inter-
face is selected, the serial clock idles LOW.
2
2
2
C-bus or SPI interface select. I
C-bus data input/output (open-drain). If SPI
C-bus or SPI serial input clock.
I2C/SPI UART WITH 64-BYTE FIFO
R
ANGE
2
C-bus interface is selected, the
D
ESCRIPTION
D
EVICE
XR20M1170
Active
Active
Active
Active
Active
S
2
TATUS
C-bus inter-