NAD VISO TWO Service Manual page 39

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

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