XR21V1414IM48 EXAR [Exar Corporation], XR21V1414IM48 Datasheet - Page 2

• Manufacturer Part Number: XR21V1414IM48
• Description: 4-CH FULL-SPEED USB UART
• Manufacturer: EXAR [Exar Corporation]

XR21V1414
4-CH FULL-SPEED USB UART
F
IGURE
3.3V VCC
USBD+
USBD-
GND
1. XR21V1414 B
SDA
SCL
USB Slave
Oscillator
Interface
Interface
Internal
LOCK
48MHz
I
2
C
D
IAGRAM
Status and
Fractional
Registers
Internal
2
Control
BRG
UART Channel A
UART Channel B
UART Channel C
UART Channel D
(Same as Ch A)
(Same as Ch A)
(Same as Ch A)
Modem IO
128-byte
384-byte
RX FIFO
TX FIFO
GPIOs/
TXA
RXA
GPIOA5/RTSA#
GPIOA4/CTSA#
GPIOA3/DTRA#
GPIOA2/DSRA#
GPIOA1/CDA#
GPIOA0/RIA#
TXB
RXB
GPIOB[5:0]/ModemIO
TXC
RXC
GPIOC[5:0]/ModemIO
TXD
RXD
GPIOD[5:0]/ModemIO
REV. 1.0.0