XR21B1424_17 Datasheet, PDF (4/64 Pages) Exar Corporation – Enhanced 4-Ch Full-Speed USB UART

Pin Configuration
XR21B1424
RXA 1
GPIOA5/RTSA#/RS485A 2
GPIOA4/CTSA# 3
GPIOA3/DTRA# 4
GPIOA2/DSRA# 5
GPIOA1/CDA# 6
GPIOA0/RIA#/RWKA# 7
GND 8
USBD+ 9
USBD- 10
VIO 11
VCC 12
VCC_REG 13
NC 14
NC 15
VBUS_SENSE 16
MaxLinear
XR21B1424
48 GPIOD9/RXTD
47 GPIOB0/RIB#/RWKB#
46 GPIOB1/CDB#
45 GPIOB2/DSRB#
44 GPIOB3/DTRB#
43 GPIOB4/CTSB#
42 GPIOB5/RTSB#/RS485B
41 RXB
40 TXB
39 GND
38 VIO
37 GPIOB6/CLKB#
36 GPIOB7/RS485B
35 ^GPIOB8/TXTB
34 GPIOB9/RXTB
33 ^{GPIOC0/RIC#/RWKC#}
Top View
4 / 64
exar.com/XR21B1424
Rev 1C