NAD VISO TWO - Page 39

XR20M1170 BLOCK DIAGRAM
I
2
C/SPI
Interface
I2C/SPI#
SO
A1/SI
A0/CS#
SCL
SDA
EN485#
ENIR#
IRQ#
Crystal Osc/Buffer
BRG
UART
Regs
XTAL2
XTAL1
64 Byte
TX FIFO
GPIOs
TX
RX
CTS#
RTS#
GPIO[7:0]
1.62V – 3.63VVCC
64 Byte
RX FIFO
UART IC : IC39
2-28