XR20M1280 Datasheet, PDF (2/63 Pages) Exar Corporation – I2C/SPI UART WITH 128-BYTE FIFO AND INTEGRATED LEVEL SHIFTERS

XR20M1280
I2C/SPI UART WITH 128-BYTE FIFO AND INTEGRATED LEVEL SHIFTERS
FIGURE 1. XR20M1280 BLOCK DIAGRAM
VCC_BUS
VCC_CORE
VCC_UART
REV. 1.0.0
SCK
SDA
A0/CS#
A1/SI
SO
IRQ#
RESET#
I2C/SPI#
EN485#
ENIR#
XTAL1
XTAL2
SLEEP/PWRDN#
1.62V-
3.63V
I/O
Buffers
I²C/
SPI
Bus
Interface
128-Byte
UART ^{TX FIFO}
TX
Regs
128-Byte
RX FIFO
RX
Flow Control
Fractional
BRG
GPIOs
Crystal Oscillator/
Buffer
1.62V-
3.63V
I/O
Buffers
1.62V-
3.63V
I/O
Buffers
TX
RX
RTS#
CTS#
GPIO[3:0]
VCC_GPIO
GPIO[15:4]
ORDERING INFORMATION
PART NUMBER
XR20M1280IL24-F
XR20M1280IL24TR-F
XR20M1280IL32-F
XR20M1280IL32TR-F
XR20M1280IL40-F
XR20M1280IL40TR-F
PACKAGE
QFN-24
QFN-24
QFN-32
QFN-32
QFN-40
QFN-40
NUMBER OF
GPIOS
4
4
8
8
16
16
NOTE: TR = Tape and reel, F = Green / RoHS
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
-40°C to +85°C
DEVICE STATUS
Active
Active
Active
Active
Active
Active
2