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XR18W750IL48 Datasheet(PDF) 10 Page - Exar Corporation

Part # XR18W750IL48
Description  WIRELESS UART CONTROLLER
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Manufacturer  EXAR [Exar Corporation]
Direct Link  http://www.exar.com
Logo EXAR - Exar Corporation

XR18W750IL48 Datasheet(HTML) 10 Page - Exar Corporation

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XR18W750
10
WIRELESS UART CONTROLLER
REV. 1.0.0
3.2
Parallel Mode (CPU) Interface
In the parallel mode, the CPU interface is 8 data bits wide with 3 address lines and control signals to execute
data bus read and write transactions. The XR18W750 data interface supports both the Intel and Motorola
compatible types of CPUs and is compatible to the industry standard 16C550 UART. Each bus cycle is
asynchronous using CS#, IOR# and IOW#, or CS# and R/W# inputs. A typical data bus interconnection for
Intel and Motorola mode is shown in Figure 4.
FIGURE 4. XR18W750 TYPICAL INTEL/MOTOROLA DATA BUS INTERCONNECTIONS (PARALLEL MODE)
8051
Microprocessor
S/P#
A2:A0
D7:D0
CS#
IOW#
IOR#
INT
A2:A0
D7:D0
CS#
IOW#
IOR#
RESET
A2:A0
D7:D0
UART_CS#
IOW#
IOR#
RESET
TXRDY#
RXRDY#
TXRDY#
RXRDY#
16/68#
VCC
UART
GND
INT
UART_INT
Intel Data Bus Interconnections
UART
RX
TX
CTS#
RTS#
TX
RX
RTS#
CTS#
8051
Microprocessor
S/P#
A2:A0
D7:D0
CS#
IOW#
IOR#
INT
A2:A0
D7:D0
CS#
IOW#
IOR#
RESET
A2:A0
D7:D0
UART_CS#
R/W#
VCC
RESET#
TXRDY#
RXRDY#
TXRDY#
RXRDY#
16/68#
GND
UART
GND
INT
UART_IRQ#
VCC
Motorola Data Bus Interconnections
UART
RX
TX
CTS#
RTS#
TX
RX
RTS#
CTS#


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