XR16M890_11 Datasheet, PDF (10/63 Pages) Exar Corporation – UART WITH 128-BYTE FIFO AND INTEGRATED LEVEL SHIFTERS

XR16M890
UART WITH 128-BYTE FIFO AND INTEGRATED LEVEL SHIFTERS
REV. 1.0.0
1.1.3 VLIO bus interface
The VLIO bus interface is similar to the Intel bus interface. The only difference is that the address and data
lines are shared. A typical data bus interconnection is shown below in Figure 6.
FIGURE 6. XR16M890 TYPICAL VLIO DATA BUS INTERCONNECTIONS
AD0
AD1
AD2
AD3
AD4
AD5
AD6
AD7
LLA #
U A R T _ IO R #
UART_IOW #
UART_CS#
U A R T _IN T
S LE E P /P W R D N
UART_RESET#
AD0
AD1
AD2
AD3
AD4
AD5
AD6
AD7
LLA#
IO R #
IOW #
CS#
IN T
SLE EP /P W R D N
RESET#
VCC_BUS
V L IO _ E N
TX
RX
DTR#
RTS#
CTS#
DSR#
CD#
RI#
GND
VCC_BUS
Serial Transceivers of
RS-232
RS-485
RS-422
Or Infrared
10